WO2025035686A1 - 薄膜板及其优化方法和薄膜容器 - Google Patents

薄膜板及其优化方法和薄膜容器 Download PDF

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Publication number
WO2025035686A1
WO2025035686A1 PCT/CN2023/142972 CN2023142972W WO2025035686A1 WO 2025035686 A1 WO2025035686 A1 WO 2025035686A1 CN 2023142972 W CN2023142972 W CN 2023142972W WO 2025035686 A1 WO2025035686 A1 WO 2025035686A1
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Prior art keywords
corrugated structure
curve
thin film
intersecting
curved surface
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Pending
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PCT/CN2023/142972
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English (en)
French (fr)
Inventor
张金伟
李晓波
刘博�
唐辉永
龙臻
程伟
高贤
杜宇
李艳辉
邢乐
陈念来
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China Petroleum Engineering Corp Ltd
China National Petroleum Corp
China Huanqiu Contracting and Engineering Corp
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China Petroleum Engineering Corp Ltd
China National Petroleum Corp
China Huanqiu Contracting and Engineering Corp
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Application filed by China Petroleum Engineering Corp Ltd, China National Petroleum Corp, China Huanqiu Contracting and Engineering Corp filed Critical China Petroleum Engineering Corp Ltd
Priority to AU2023461675A priority Critical patent/AU2023461675A1/en
Priority to JP2025561384A priority patent/JP2026513074A/ja
Priority to KR1020267007136A priority patent/KR20260042293A/ko
Publication of WO2025035686A1 publication Critical patent/WO2025035686A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/10—Numerical modelling
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces

Definitions

  • the present application relates to the technical field of cryogenic storage tanks, and in particular, to a film plate and an optimization method thereof, and a film container.
  • Film containers such as film tanks, as a kind of cryogenic storage tanks, can contain cryogenic liquid hydrogen, cryogenic liquid oxygen, cryogenic LNG, cryogenic ethylene, cryogenic ethane, cryogenic liquid ammonia, cryogenic propane, cryogenic propylene, cryogenic butane and other liquids at nearly normal pressure.
  • Membrane tanks generally have three core structures: an outer tank with greater strength and rigidity, a flexible inner tank made of metal film, and an insulating support material between the inner and outer tanks;
  • the outer tank is mainly responsible for supporting the tank body and ensuring the strength and rigidity of the storage tank;
  • the insulating material is responsible for transferring the load of the inner tank film to the outer tank, and is responsible for isolating the heat transfer between the medium and the outside world;
  • the flexible inner tank is responsible for ensuring the liquid tightness of the membrane tank, and the membrane plate is one of the key components used to construct the flexible inner tank.
  • the material of the film plate of the flexible inner tank is selected from materials with a large linear expansion coefficient such as stainless steel, it is necessary to consider the adverse effects of temperature difference, static hydraulic pressure, dynamic hydraulic pressure and other loads on the metal material, which may cause the film plate to produce shrinkage, stretching, instability and other adverse effects. Therefore, it is necessary to design a plate-like structure with multiple arched waves to deal with the above problems.
  • the arched waves on a part of the film plates are discontinuous arched waves, that is, the intersecting positions of the two waves cannot be connected.
  • the ends of each arched wave can only be formed by stretching the material, thereby increasing the forming thinning amount, elongation and residual stress of the material.
  • the position where the corrugation is disconnected is both the position of stress concentration and the position of the largest thinning amount, resulting in a superposition of leakage risks.
  • the arched waves on a part of the film plates are mutually orthogonal arched waves, and a complex pleated structure is formed at the intersection. Therefore, the design and manufacturing costs are high and the difficulty is great, and the forming accuracy is difficult to quantitatively control.
  • the purpose of the present application is to provide a film plate and its optimization method and a film container, so as to solve the technical problems that the current film plate using discontinuous arched waves will increase the material forming thinning amount, elongation, residual stress and cause leakage risk superposition, and solve the problem that the fold structure formed at the intersection position when the current film plate uses orthogonal arched waves will cause high design and manufacturing costs,
  • the technical problem is that the molding accuracy is difficult to control.
  • the present application provides a thin film plate, on which a first corrugated structure, a second corrugated structure and at least one intersecting curved surface are provided.
  • the first corrugated structure is convexly arranged and the second corrugated structure is concavely arranged, and the first corrugated structure and the second corrugated structure are cross-arranged through the intersecting curved surface; wherein a designed curved surface is defined, and the designed curved surface is a curved surface structure formed by translating a first convex curve along a first concave curve and sliding the vertex of the first convex curve on the first concave curve, and the first corrugated structure and the second corrugated structure can intersect with the designed curved surface, and the intersecting lines enclose to form the intersecting curved surface.
  • both the first convex curve and the first concave curve are curves that can be fitted by Taylor's formula.
  • the first convex curve is any one of a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve and a spline curve, and/or a combination of at least two thereof
  • the first concave curve is any one of a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve and a spline curve, and/or a combination of at least two thereof.
  • the first convex curve and the first concave curve are both parabolas, and the intersecting surface is a hyperbolic parabola.
  • the first corrugated structure and the second corrugated structure are arranged orthogonally or obliquely.
  • the first corrugated structure includes at least one first corrugation and at least one second corrugation connected to the intersecting curved surface
  • the second corrugated structure includes at least one third corrugation and at least one fourth corrugation connected to the intersecting curved surface
  • the first corrugation is a curved surface structure formed by translating the second convex curve along the first directrix
  • the second corrugation is a curved surface structure formed by translating the third convex curve along the second directrix
  • the third corrugation is a curved surface structure formed by translating the second concave curve along the third directrix
  • the fourth corrugation is a curved surface structure formed by translating the third concave curve along the fourth directrix.
  • the second convex curve and the third convex curve are both the same as the first convex curve; the second concave curve and the third concave curve are both the same as the first concave curve.
  • the first directrix is a straight line or a curve located in a first plane parallel to the plate body; the second directrix is a straight line or a curve located in a second plane parallel to the plate body; the third directrix is a straight line or a curve located in a third plane parallel to the plate body; the fourth directrix is a straight line or a curve located in a fourth plane parallel to the plate body.
  • the first plane and the second plane are the same plane; the third plane and the fourth plane are the same plane.
  • the first corrugated structure is a corrugated structure with equal width extension; or the first corrugated structure includes corrugated sections with a gradually contracting extension or a gradually expanding extension; the second corrugated structure is a corrugated structure with equal width extension; or the second corrugated structure includes corrugated sections with a gradually contracting extension or a gradually expanding extension.
  • the span range of the first corrugated structure and the second corrugated structure are both 1 mm to 1000 mm.
  • the height range of the convex arrangement of the first corrugated structure and the depth range of the concave arrangement of the second corrugated structure are both 1mm ⁇ 500mm.
  • the thickness of the plate body ranges from 0.1 mm to 10 mm.
  • the present application provides a method for optimizing a thin film plate, which is used to optimize the above-mentioned thin film plate, comprising the following steps: adjusting optimization parameters to change the structural parameters of the thin film plate; wherein the optimization parameters are at least one parameter in the mathematical expression of the first corrugated structure, the second corrugated structure, and the intersecting surface; obtaining the performance parameters of the thin film plate; repeating the above steps until the performance parameters reach a preset value.
  • the mathematical expression of the intersecting surfaces is a mathematical equation of a hyperbolic parabola
  • the optimization parameter includes at least one constant of the mathematical expression of the intersecting surfaces.
  • the structural parameters include the size, shape, curvature, peak height, valley depth and/or maximum span of the first corrugated structure, the second corrugated structure and the intersecting curved surface.
  • the performance parameters include the displacement compensation capability, strength, fatigue performance and/or progressive deformation performance of the first corrugated structure, the second corrugated structure and the intersecting curved surface.
  • the performance parameters of the thin film plate are obtained, including the following steps: establishing a three-dimensional model of the thin film plate according to the adjusted optimization parameters and the mathematical expression of the intersecting surfaces; and obtaining its performance parameters by simulation calculation of the three-dimensional model of the thin film plate.
  • the present application also provides a film container, comprising at least one of the above-mentioned film plates.
  • the film plate and film container of the present application are provided with a relatively convex first corrugated structure and a relatively concave second corrugated structure and an intersecting curved surface connecting the first corrugated structure and the second corrugated structure on the plate body, and by defining a design curved surface defined by a convex curve and a concave curve, the first corrugated structure and the second corrugated structure intersect with the design curved surface to form an intersecting curved surface.
  • the first corrugated structure, the second corrugated structure and the intersecting curved surface can cooperate with each other to improve the displacement compensation ability of the film plate, thereby helping to improve the liquid tightness and air tightness of the film container; on the other hand, it is helpful to reduce the elongation of the plate body when the intersecting curved surface is pressed, the thinning amount of forming is small, and the residual stress is small, so that the structural size is stable after finalization; on the other hand, the design curved surface can be limited by limiting the concave curve and the convex curve, and then the intersecting curved surface can be limited, so that it is convenient to optimize the performance of the engineering structure by adjusting the parameters of the mathematical expression, and to facilitate mold processing and press-forming manufacturing of the film plate, so it is helpful to reduce the cost and difficulty of design and manufacturing, and the molding accuracy is easy to control.
  • the optimization method of the film plate of the present application utilizes at least one parameter in the mathematical expression of the first corrugated structure, the second corrugated structure and the intersecting surface as an optimization parameter, and changes the structural parameters of the film plate by adjusting the optimization parameter, thereby optimizing the performance of the film plate and making the performance of the film plate meet the design requirements.
  • FIG1 is a perspective schematic diagram of a film plate in Example 1 of the present application.
  • FIG2 is a schematic diagram of the relationship between the designed curved surface and the first convex curve and the first concave curve in the first embodiment of the present application;
  • FIG3 is a schematic diagram of the relationship between the intersecting curved surfaces and the intersection lines in the first embodiment of the present application
  • FIG4 is a top view of the film plate in Example 1 of the present application.
  • FIG5 is a side view of the film plate in Example 1 of the present application.
  • FIG6 is a front view of the film plate in Example 1 of the present application.
  • FIG7 is a perspective schematic diagram of a film plate in Example 2 of the present application.
  • FIG8 is a top view of the film plate in the third embodiment of the present application.
  • FIG9 is a three-dimensional schematic diagram of intersecting curved surfaces in Embodiment 3 of the present application.
  • FIG10 is a perspective schematic diagram of a film plate in Embodiment 4 of the present application.
  • FIG11 is a perspective schematic diagram of a film plate in Embodiment 5 of the present application.
  • FIG12 is a perspective schematic diagram of a film plate in Example 6 of the present application.
  • FIG13 is a three-dimensional schematic diagram of a designed curved surface of a film plate in Example 6 of the present application.
  • FIG14 is a three-dimensional schematic diagram of intersecting curved surfaces in Embodiment 6 of the present application.
  • FIG15 is a perspective schematic diagram of a film plate in Embodiment 7 of the present application.
  • FIG16 is a schematic diagram of optimizing the design of intersecting curved surfaces in the present application.
  • FIG. 17 is a partial schematic diagram of a film container in the present application.
  • the present application provides a thin film plate 100, including a plate body 1, on which a first corrugated structure 2, a second corrugated structure 3 and at least one intersecting curved surface 4 are provided, the first corrugated structure 2 is convexly arranged, and the second corrugated structure 3 is The corrugated structure 3 is concavely arranged, and the first corrugated structure 2 and the second corrugated structure 3 are cross-arranged through an intersecting curved surface 4; wherein a designed curved surface 5 is defined, and the designed curved surface 5 is a curved surface structure formed by the first convex curve A1 translating along the first concave curve B1 and the vertex of the first convex curve A1 sliding on the first concave curve B1, the first corrugated structure 2 and the second corrugated structure 3 can intersect with the designed curved surface 5, and the intersection line X encloses the intersecting curved surface 4.
  • intersection line formed by the intersection of the first corrugated structure 2 and the second corrugated structure 3 with the designed curved surface 5 is the intersection line X
  • the intersection line X between the first corrugated structure 2 and the second corrugated structure 3 and the designed curved surface 5 is the outer contour line of the intersecting curved surface 4; wherein, the first corrugated structure 2 intersects with the designed curved surface 5 along the direction of the tangent Q2 at the vertex of the first concave curve B1
  • the second corrugated structure 3 intersects with the designed curved surface 5 along the direction of the tangent Q1 at the vertex of the first convex curve A1, so that the displacement compensation capabilities of the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4 can be coordinated more.
  • the present application defines the design curved surface 5 formed by the first convex curve A1 translating along the first concave curve B1 and the vertex of the first convex curve A1 sliding on the first concave curve B1, only for the purpose of clearly describing the shape of the structure of the intersecting curved surface 4 possessed by the film plate 100 of the present application, and the design curved surface 5 is not the structure possessed by the film plate 100 of the present application.
  • the intersecting curved surfaces 4 having the same shape but described in different ways should also be within the protection scope of the present application.
  • first corrugated structure 2 and the second corrugated structure 3 are not limited to corrugated structures that must bend and extend in a specific direction. Instead, for the convenience of description, two corrugated structures extending in different directions and bending in opposite directions relative to the plate body 1 are defined as the first corrugated structure 2, such as the peak structure from the perspective of the figure; and the other is positioned as the second corrugated structure 3, such as the trough structure from the perspective of the figure.
  • the first corrugated structure 2 includes at least one first corrugation 21 and at least one second corrugation 22, which are the same or different, formed by the translation of at least one convex curve along at least two directrixes, and the at least first corrugation 21 and at least the second corrugation 22 are connected by at least one intersecting curved surface 4.
  • the second corrugated structure 3 includes at least one third corrugation 31 and at least one fourth corrugation 32, which are the same or different, formed by the translation of at least one concave curve along at least two directrixes, and the at least one third corrugation 31 and at least one fourth corrugation 32 are connected by at least one intersecting curved surface 4.
  • the first corrugation 21 and the second corrugation 22 intersect with the design curved surface 5 along the direction of the tangent Q2 at the vertex of the first concave curve B1 to form a first intersecting line X1 and a second intersecting line X2 connected thereto
  • the third corrugation 31 and the third corrugation 32 intersect with the design curved surface 5 along the direction of the tangent Q1 at the vertex of the first convex curve A1 to form a third intersecting line X3 and a fourth intersecting line X4 connected thereto.
  • the film plate 100 of the present application is provided with a relatively convex first corrugated structure 2 and a relatively concave second corrugated structure 3 and an intersecting curved surface 4 connecting the first corrugated structure 2 and the second corrugated structure 3 on the plate body 1, and a design curved surface 5 defined by a convex curve A1 and a concave curve B1 is defined, and the first corrugated structure 2 and the second corrugated structure 3 intersect with the design curved surface 5 to form an intersecting curved surface 4.
  • the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4 can cooperate with each other to improve the displacement compensation ability of the film plate 100, thereby facilitating the improvement of the liquid tightness and the air tightness of the film container; on the other hand, it is facilitating the reduction in forming and the residual stress of the plate body 1 when the intersecting curved surface 4 is pressed.
  • the concave curve and convex curve of the design surface 5 can be limited to achieve the definition of the intersecting surface 4, so that it is convenient to optimize the performance of the engineering structure by adjusting the parameters of the mathematical expression, and to facilitate mold processing and press-forming manufacturing of the film plate, thus helping to reduce the cost and difficulty of design and manufacturing, and the molding accuracy is easy to control.
  • the intersecting curved surface 4 and the designed curved surface 5 can be completely the same, that is, the intersection line X between the first corrugated structure 2 and the second corrugated structure 3 and the designed curved surface 5 is the outer contour line of the designed curved surface 5.
  • the intersecting curved surface 4 can also be a part of the designed curved surface 5.
  • the plate body 1 is generally a flat plate.
  • the shape of the plate body 1 is not specifically limited; it can be set to a square as in the embodiment of the present application; it can also be set to a rectangle, trapezoid, triangle, arc or other shapes as in other embodiments of the present application.
  • the thickness of the plate body 1 ranges from 0.1 mm to 10 mm, preferably from 0.1 mm to 3 mm.
  • the center point O1 of the intersecting curved surface 4 that is, the intersection point where the vertex of the convex curve A1 and the vertex of the concave curve B1 intersect, can be set flush with the plane reference point O2 of the plate body 1, so that when the intersecting curved surface 4 is pressed and formed on the plate body 1, the elongation is small, the thinning amount of forming is small, the residual stress is small, and the structural size of the intersecting curved surface 4 is more stable after being formed.
  • the intersection angle between the first corrugated structure 2 and the third corrugated structure 3, and the distribution angle between the multiple corrugations in the first corrugated structure 2 and the distribution angle between the multiple corrugations in the second corrugated structure 3 may not be specifically limited, and it is only necessary to make the multiple corrugations of the first corrugated structure 2 and the multiple corrugations of the second corrugated structure 3 intersect with the intersecting curved surface 4.
  • first corrugated structure 2 and the second corrugated structure 3 are corrugated structures extending in two straight directions, and the first corrugated structure 2 and the second corrugated structure 3 may be arranged orthogonally, generally in the shape of a "cross", or may be arranged obliquely, generally in the shape of an "X".
  • the number of corrugations of the first corrugated structure 2, the number of corrugations of the second corrugated structure 3, and the number of intersecting curved surfaces 4 on the plate body 1 may not be specifically limited, as long as a first corrugation 21, a second corrugation 22 of the first corrugated structure 2, and a third corrugation 31 and a fourth corrugation 32 of the second corrugated structure 3 are connected to an intersecting curved surface 4.
  • the number of corrugations of the first corrugated structure 2 and the number of corrugations of the second corrugated structure 3 may be the same, for example, two respectively, the two corrugations of the first corrugated structure 2 are arranged in one direction and connected to an intersecting curved surface 4, and the two corrugations of the second corrugated structure 3 are arranged in another direction and connected to the intersecting curved surface 4.
  • the number of corrugations in the first corrugated structure 2 and the number of corrugations in the second corrugated structure 3 may also be different and cross-shaped in a grid shape.
  • the three corrugations of the first corrugated structure 2 are arranged in one direction and connected by two intersecting curved surfaces 4, and the four corrugations of the second corrugated structure 3 are grouped in pairs, and the two groups of corrugations are connected to the two intersecting curved surfaces 4;
  • the four corrugations of the first corrugated structure 2 are arranged in one direction and connected by three intersecting curved surfaces 4, and the six corrugations of the second corrugated structure 3 are grouped in pairs, and the three groups of corrugations are connected to the three intersecting curved surfaces 4.
  • the first corrugation 21 is a curved surface structure formed by translating the second convex curve A2 along the first directrix Z1.
  • 22 is a curved surface structure formed by translating the third convex curve A3 along the second directrix Z2
  • the third corrugation 31 is a curved surface structure formed by translating the second concave curve B2 along the third directrix Z3
  • the fourth corrugation 32 is a curved surface structure formed by translating the third concave curve B3 along the fourth directrix Z4.
  • the second convex curve A2 and the third convex curve A3 can be the same or different, and the second convex curve A2 and the third convex curve A3 can be the same as the first convex curve A1 or different; similarly, the second concave curve B2 and the third concave curve B3 can be the same or different, and can be the same as the first concave curve B1 or different.
  • the first directrix Z1 and the second directrix Z2 may be the same or different; similarly, the third directrix Z3 and the fourth directrix Z4 may be the same or different; in addition, the first directrix Z1 may be a straight line or a curve located in a first plane parallel to the plate body 1; the second directrix Z2 may be a straight line or a curve located in a second plane parallel to the plate body 1; the third directrix Z3 may be a straight line or a curve located in a third plane parallel to the plate body 1; the fourth directrix Z4 may be a straight line or a curve located in a fourth plane parallel to the plate body 1.
  • first plane and the second plane may be the same plane, or may be two planes with a height difference above the plate body 1; similarly, the third plane and the fourth plane may be the same plane, or may be two planes with a height difference below the plate body 1. Therefore, the extension lengths of the first corrugation 21, the second corrugation 22, the third corrugation 31 and the fourth corrugation 32 may be specifically defined, and may be the same or different.
  • the span range (i.e., the crest or trough width) of the first corrugated structure 2 and the second corrugated structure 3 are both 1 mm to 1000 mm.
  • the height of the first corrugated structure 2 protruding relative to the plate body 1 (i.e., the crest height) and the depth of the second corrugated structure 3 recessed relative to the plate body 1 (i.e., the trough depth) are both 1 mm to 500 mm.
  • the first corrugated structure 2 can be a corrugated structure with equal width extension, that is, the convex curve of the first corrugated structure 2 is limited to a constant span during the translation process; the first corrugated structure 2 can also include a corrugated segment with a gradually contracting extension or a gradually expanding extension, that is, the convex curve of the first corrugated structure 2 is limited to a gradually decreasing or increasing span during the translation process to form a gradually changing corrugated segment; similarly, the second corrugated structure 3 can be a corrugated structure with equal width extension, that is, the concave curve of the second corrugated structure 3 is limited to a constant span during the translation process; or the second corrugated structure 3 includes a corrugated segment with a gradually contracting extension or a gradually expanding extension, that is, the concave curve of the second corrugated structure 3 is limited to a gradually decreasing or increasing span during the translation process to form a gradually changing corrugated segment.
  • the intersecting surface 4 is connected to the first corrugation 21 and the second corrugation 22 via a first transition surface
  • the intersecting surface 4 is connected to the third corrugation 31 and the third corrugation 32 via a second transition surface.
  • the first transition surface includes a first arc transition surface
  • the second transition surface includes a second arc transition surface
  • the first arc transition surface can be a curved surface structure formed by the translation of the convex curve A1 along an arc
  • the second arc transition surface can be a curved surface structure formed by the translation of the concave curve B1 along an arc.
  • the two ends of the intersecting surface 4 in the direction of the tangent Q2 are connected to the first corrugation 21 and the second corrugation 22 via two first arc transition surfaces.
  • the two ends of the intersecting surface 4 in the direction of the tangent Q1 are connected to the first corrugation 21 and the second corrugation 22 via two second arc transition surfaces.
  • the third corrugation 31 and the fourth corrugation 32 are connected.
  • the present application provides some mathematical description methods, so that mathematical expressions can be used to accurately describe the intersecting surface 4, the first corrugated structure 2 and the second corrugated structure 3, so that the intersecting surface 4, the first corrugated structure 2 and the second corrugated structure 3 can be accurately processed according to the mathematical expressions.
  • the structure of the film plate 100 can also be adjusted by adjusting the parameters in the mathematical expressions, thereby optimizing the performance of the film plate 100, which is beneficial to modeling, stress analysis, structural design, theoretical calculation, mold processing, press manufacturing and other works of the film plate 100.
  • the specific optimization method is described in the second implementation mode, which will not be repeated here. Specifically:
  • the concave curve A1 and the convex curve B1 defining the intersecting surface 4, as well as any convex curve defining the first corrugated structure 2 and any convex curve defining the second corrugated structure 3, can all be fitted by Taylor's formula to determine their mathematical expressions.
  • Taylor's formula can be fitted to obtain mathematical expressions of a variety of curves, including parabolas, catenaries, arcs, trigonometric functions, inverse trigonometric function curves, exponential function curves, logarithmic function curves, and spline curves whose mathematical expressions have been standardized, as well as other curves whose mathematical expressions have not been standardized.
  • the Taylor formula can be used to approximate a variety of curve functions with n-order polynomials, and can approximate the curve within a certain domain of the function within a certain error range.
  • the Taylor formula is used to approximate the following expression to a cosine curve:
  • the concave curve A1 and the convex curve B1 that define the intersecting surface 4, as well as any convex curve that defines the first corrugated structure 2 and any concave curve that defines the second corrugated structure 3, can be any one of a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve and a spline curve, that is, a curve described by a mathematical expression; or at least a combination of the two, that is, the concave curve A1 and the convex curve B1 that define the intersecting surface 4, as well as any convex curve that defines the first corrugated structure 2 and any concave curve that defines the second corrugated structure 3, can be a curve formed by connecting multiple curve segments with different mathematical expressions.
  • Embodiment 1 shown in FIGS. 1 to 6 is a typical and special preferred embodiment of the present application, and is characterized in that:
  • the convex curve defining the first corrugated structure 2 is the same as the convex curve defining the intersecting curved surface 4, that is, the mathematical expressions of the two are the same;
  • the concave curve defining the second corrugated structure 3 is the same as the convex curve defining the intersecting curved surface 4, that is, the mathematical expressions of the two are the same. Therefore, by defining a concave curve and a convex curve, the shapes of the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4 can be defined, so it is easier to describe mathematically, which is conducive to the processing of the thin film plate 100. Engineering and design.
  • the distribution angle between the multiple corrugations in the first corrugated structure 2 and the multiple corrugations in the second corrugated structure 3 is 90 degrees, that is, the axis of the first corrugated structure 2 and the axis of the second corrugated structure 3 are orthogonal to each other, so that the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4 can cooperate with each other to further improve the displacement compensation capability of the film plate 100, thereby further improving the liquid tightness and air tightness of the film container.
  • the shape of the intersecting surface 4 is exactly the same as that of the designed surface 5, and the convex curve defining the first corrugated structure 2, the concave curve defining the second corrugated structure 3, and the concave curve and convex curve defining the intersecting surface 4 are all parabolas, that is, the designed surface 5 and the intersecting surface 4 are the same hyperbolic paraboloid, so that a concave curve and a convex curve can be mathematically described by a simpler mathematical expression.
  • the film plate 100 of this embodiment can be simplified as follows: two parabolas with opposite openings can be translated and slid along two mutually orthogonal lines to form the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4, and finally form the film plate 100 together with the plate body 1.
  • a first design directrix is defined, and the first design directrix includes a first straight line segment (i.e., a first directrix Z1), a first intermediate curve segment (i.e., a concave curve B1), and a second straight line segment (i.e., a second directrix Z2) connected to each other; wherein the first straight line segment and the second straight line segment are extended along the tangent line Q2, and the first intermediate curve segment is the same as the concave curve B1; the convex curve A1 is translated along the first straight line segment, the first intermediate curve segment, and the second straight line segment as a generatrix in sequence, and the vertex of the convex curve slides on the first design directrix, thereby forming a first corrugation 21, an intersecting curved surface 4, and a second corrugation in sequence.
  • a first straight line segment i.e., a first directrix Z1
  • a first intermediate curve segment i.e., a concave curve B
  • the second design directrix which includes a third straight line segment (also known as the third directrix Z3), a second intermediate curve segment (also known as the convex curve A1) and a fourth straight line segment (also known as the third directrix Z4) connected to each other; wherein the third straight line segment and the fourth straight line segment are extended along the tangent Q1, and the second intermediate curve segment is the same as the convex curve; the concave curve is translated along the third straight line segment, the second intermediate curve segment and the fourth straight line segment as the generatrix in sequence, and the vertex of the concave curve slides on the second design directrix, thereby forming a third corrugation 31, the same intersecting curved surface 4 and a fourth corrugation 32 in sequence.
  • the center point O1 of the intersecting curved surface 4 is set flush with the plane reference point O2 of the plate body 1.
  • the intersecting surface 4 may have different shapes.
  • the first convex curve A1, the second convex curve A2, the third convex curve A3, the first concave curve B1, the second concave curve B2 and the third concave curve B3 are all arcs, that is, the first corrugation 21, the second corrugation 22, the third corrugation 31 and the fourth corrugation 32 are all parts of a cylindrical surface, and the intersecting curved surface 4 is a part of a torus surface.
  • the third embodiment shown in FIG. 8 and FIG. 9 is different from the first embodiment in that:
  • the distribution angle between the multiple corrugations in the first corrugated structure 2 and the multiple corrugations in the second corrugated structure 3 is not 90 degrees, that is, the first corrugated structure 2 and the second corrugated structure 3 are not orthogonally arranged. Specifically, the angle between the first convex curve A1 and the first concave curve B1 is not 90 degrees.
  • the fourth embodiment shown in FIG. 10 is different from the first embodiment in that:
  • the first corrugated structure 2 and/or the second corrugated structure 3 are corrugated structures with non-uniform width extension.
  • the first corrugated structure 2 and/or the second corrugated structure 3 are corrugated structures with non-linear extension.
  • the third corrugation 31 in the second corrugated structure 3 includes a first equal-width corrugated section 311 connected to the intersecting curved surface 4 and extending with equal width, a tapered corrugated section 312 connected to the first equal-width corrugated section 311 and extending with tapered extension, and a second equal-width corrugated section 313 connected to the tapered corrugated section 312 and extending with equal width, wherein the width (i.e., span) of the first equal-width corrugated section 311 is greater than the width of the second equal-width corrugated section 313.
  • the second corrugation 22 in the second corrugated structure 3 is formed by translation of a concave curve along a curve in a plane parallel to the plate
  • the fifth embodiment shown in FIG. 11 is different from the first embodiment in that:
  • the first corrugation 21 and the second corrugation 22 of the first corrugated structure 2 are arranged non-coaxially and/or the third corrugation 31 and the fourth corrugation 32 of the second corrugated structure 3 are arranged non-coaxially.
  • the third plane parallel to the plate body 1 where the third directrix Z3 defining the third corrugation 31 is located and the fourth plane parallel to the plate body 1 where the fourth directrix Z4 defining the fourth corrugation 32 is located are the same plane
  • the third directrix Z3 and the fourth directrix Z4 are two parallel lines in the plane.
  • the third directrix Z3 and the fourth directrix Z4 are two parallel lines in two parallel planes, that is, there is a height difference between the two in the thickness direction of the plate body 1.
  • FIG. 12 , FIG. 13 and FIG. 14 is different from the first embodiment in that:
  • the convex curve defining the first corrugation 21, the convex curve defining the second corrugation 22, the convex curve defining the third corrugation 31 and/or the convex curve defining the fourth corrugation 32 are non-parabolas.
  • the design surface 5 is a hyperbolic parabola.
  • the intersecting surface 4 is not a hyperbolic parabola and is a part of the design surface 5.
  • the convex curve defining the first corrugation 21, the convex curve defining the second corrugation 22, the convex curve defining the third corrugation 31 and the convex curve defining the fourth corrugation 32 all include an arc segment C1 and two parabola segments C2 connected to the two ends of the arc segment C1.
  • the intersection line X where the first corrugation 21, the second corrugation 22, the third corrugation 31 and the fourth corrugation 32 intersect with the design surface 5 encloses the intersecting surface
  • the seventh embodiment shown in FIG. 15 is different from the first embodiment in that:
  • the convex height of the first corrugated structure 2 is higher than the concave depth of the second corrugated structure 3, and accordingly, the center point O1 of the intersecting curved surface 4 is located above the plane reference point O2 of the plate body 1.
  • the present application also provides a method for optimizing the thin film plate 100, which is used to optimize the thin film plate 100.
  • Optimization includes the following steps: adjusting optimization parameters to change the structural parameters of the thin film plate 100; wherein the optimization parameters are at least one parameter in the mathematical expression of the first corrugated structure 2, the second corrugated structure 3 and the intersecting surface 4; obtaining the performance parameters of the thin film plate 100; repeating the above steps until the performance parameters reach the preset value.
  • the optimization method of the thin film plate 100 of the present application uses at least one parameter in the mathematical expression of the intersecting surface 4 as an optimization parameter, and changes the structural parameters of the thin film plate 100 by adjusting the optimization parameter, thereby optimizing the performance of the thin film plate 100 and making the performance of the thin film plate 100 meet the design requirements.
  • the shape of the intersecting surface 4 is determined by the first convex curve A1 and the first concave curve B1, and in combination with Figures 1 to 3, in some special cases, the first convex curve A1 is equivalent to the second convex curve A2 and the third convex curve A3, and the first concave curve B1 is respectively equivalent to the second concave curve B2 and the third concave curve B3, therefore, once the mathematical expression of the intersecting surface 4 is determined, the mathematical expressions of the first convex curve A1 and the first concave curve B1 are also determined, that is, the mathematical expressions of the second convex curve A2 and the third convex curve A3 and the second concave curve B2 and the third concave curve B3 are also determined, that is, by defining a concave curve and a convex curve, the definition of the intersecting surface 4, the first corrugated structure 2 and the second corrugated structure 3 can be achieved.
  • the structures of the first corrugated structure 2 and the second corrugated structure 3 will also change accordingly, thereby changing the structural parameters of the film plate 100.
  • the intersecting surface 4 changes to the shape of the intersecting surface 4’, and accordingly, the first convex curve A1 changes to the first convex curve A1’, and the first concave curve B1 changes to the first concave curve B1’.
  • the first convex curve A1, the second convex curve A2, the third convex curve A3, the first concave curve B1, the second concave curve B2 and the third concave curve B3 are all parabolas. Therefore, the mathematical expression of the intersecting surface 4 is the mathematical equation of a hyperbolic paraboloid, and the optimization parameter includes at least one constant of the mathematical equation of the intersecting surface 4. Specifically, the specific mathematical equation of the intersecting surface 4 is related to the established reference coordinate system, so it may not be specifically limited.
  • constant h and constant b are fixed, and only constant a is selected as the optimization parameter for adjustment.
  • the value ranges of variables x, variable y and variable z are limited.
  • the mathematical expression of the intersecting surface 4 can also be in the following form: or
  • one or more constants among constant h, constant v, constant u, constant a and constant b can be selected as optimization parameters for adjustment.
  • the structural parameters include the size, shape, curvature, peak height, valley depth and/or maximum span of the first corrugated structure 2 , the second corrugated structure 3 and the intersecting curved surface 4 .
  • obtaining the performance parameters of the thin film plate 100 includes the following steps: establishing a three-dimensional model of the thin film plate 100 according to the adjusted optimization parameters and the mathematical expression of the intersecting curved surface 4; and obtaining its performance parameters by simulation calculation of the three-dimensional model of the thin film plate 100.
  • the performance parameters include the displacement compensation capability, strength, fatigue performance and/or progressive deformation performance of the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4.
  • the present application optimizes the thin film plate 100 by first conducting theoretical research based on the three-dimensional model, and obtaining performance parameters through simulation calculations, and then determining whether it can meet engineering requirements; there is no need to first manufacture the actual thin film plate 100, and then conduct experiments based on the actual thin film plate 100 to obtain its performance parameters, or first scan the actual thin film plate 100 into a three-dimensional model through three-dimensional scanning and other methods, and then perform operations such as mold repair to obtain a three-dimensional model that is relatively close to the actual thin film plate 100, and finally conduct theoretical research based on the three-dimensional model; therefore, the process of optimizing the thin film plate 100 in the present application is simple and low-cost, which is conducive to the iteration of the thin film plate 100 and makes it more in line with design requirements.
  • the film plate 100 can be optimized by adjusting the parameters of the mathematical expression so that its performance can meet the engineering requirements. Moreover, by adjusting the parameters of the mathematical expression for optimization, the film plate 100 can have different performances in different directions, providing an operational, accurate calculation and design method for meeting different engineering requirements.
  • the main function of the film plate 100 in the present application is to realize the displacement compensation function in two intersecting directions (such as two orthogonal directions) while maintaining a certain strength and stability, and the displacement required to be compensated in the two intersecting directions can be set to be the same or different according to engineering requirements, therefore, based on such an adjustment idea, the film plate 100 is optimized so that the displacement compensation function of the film plate 100 in the two intersecting directions meets the design requirements.
  • the thin film plate 100 is processed. Specifically, a press mold is first opened according to the optimization parameters determined after the adjustment and the target mathematical expression of the intersecting surface 4, and then the plate body 1 is pressed into the thin film plate 100 having the first corrugated structure 2, the second corrugated structure 3 and the intersecting surface 4 using the press mold.
  • the present application further provides a film container, including at least one film plate 100 .
  • the film plate 100 in this embodiment has the same specific structure, working principle and beneficial effects as the film plate 100 in the first embodiment, and will not be repeated here.
  • one of the first corrugated structure 2 and the second corrugated structure 3 on the film plate 100 is concave toward the inside of the tank, and the other is concave toward the outside of the tank.
  • the flexible inner tank of the film container is formed by splicing a plurality of film sheets 100.
  • the four corners of the square film sheets 100 are trimmed; any side edge of the film sheet 100 can also be pressed and flattened before welding.

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Abstract

一种薄膜板及其优化方法和薄膜容器，薄膜板包括板体，板体上设有第一波纹结构、第二波纹结构以及至少一相交曲面，第一波纹结构凸起设置，第二波纹结构凹陷设置，且第一波纹结构和第二波纹结构通过相交曲面交叉设置；其中，定义一设计曲面，设计曲面为第一凸曲线沿第一凹曲线平移且第一凸曲线的顶点在第一凹曲线上滑动形成的曲面结构，第一波纹结构和第二波纹结构能与设计曲面相贯，且相贯线围合形成相交曲面。

Description

薄膜板及其优化方法和薄膜容器
相关申请
本申请要求于2023年8月15日递交的申请号为202311027994.1的中国专利申请的优先权，并引用上述专利申请公开的内容作为本申请的一部分。
技术领域
本申请涉及低温储罐技术领域，特别地，有关于一种薄膜板及其优化方法和薄膜容器。
背景技术
薄膜容器，如薄膜罐，作为一种低温储罐，可在接近常压下盛装低温液氢、低温液氧、低温LNG、低温乙烯、低温乙烷、低温液氨、低温丙烷、低温丙烯、低温丁烷等液体。
薄膜罐一般有三大核心结构，分别为：具有较大强度和刚性的外罐、金属薄膜制成的柔性内罐，以及介于内罐和外罐之间的绝热支撑材料；其中，外罐主要负责支撑罐体，保证储罐的强度和刚度；绝热材料负责将内罐薄膜的载荷传递至外罐，同时负责隔绝介质与外界的热量传递；柔性内罐负责保证薄膜罐的液密性，而薄膜板则是构建柔性内罐所用的关键零部件之一。
当柔性内罐的薄膜板的材料选用不锈钢等线膨胀系数较大的材料时，需要考虑金属材料受温差、静液压、动液压等载荷而造成薄膜板产生收缩、拉伸、失稳等不利影响，因此需要设计为具有多个拱形波的板状结构，以应对上述问题。
现有技术中，一部分薄膜板上的拱形波为间断式的拱形波，即两波交错的位置无法贯通，在压型加工时只能靠材料的拉伸来形成各拱形波的端头，从而增大了材料的成型减薄量、延伸率以及残余应力，并且波纹断开的位置，既是应力集中的位置，也是减薄量最大的位置，造成泄漏风险叠加；还有一部分薄膜板上的拱形波为互相正交的拱形波，相交位置形成复杂的褶皱结构，因此设计及制造的成本高、难度大，且成型精度难以定量控制。
发明内容
本申请的目的是提供一种薄膜板及其优化方法和薄膜容器，以解决目前薄膜板采用间断式拱形波会增大材料的成型减薄量、延伸率、残余应力以及造成泄漏风险叠加的技术问题，并解决了目前薄膜板采用正交拱形波时相交位置形成的褶皱结构会造成设计及制造的成本高、 难度大，且成型精度难以控制的技术问题。
本申请的上述目的可采用下列技术方案来实现：
本申请提供一种薄膜板，板体上设有第一波纹结构、第二波纹结构以及至少一相交曲面，第一波纹结构凸起设置和第二波纹结构凹陷设置，且第一波纹结构和第二波纹结构通过相交曲面交叉设置；其中，定义一设计曲面，设计曲面为第一凸曲线沿第一凹曲线平移且第一凸曲线的顶点在第一凹曲线上滑动形成的曲面结构，第一波纹结构和第二波纹结构能与设计曲面相贯，且相贯线围合形成相交曲面。
本申请的实施方式中，第一凸曲线和第一凹曲线均为能通过泰勒公式拟合的曲线。
本申请的实施方式中，第一凸曲线为抛物线、悬链线、圆弧、三角函数曲线、反三角函数曲线、指数函数曲线、对数函数曲线以及样条曲线中的任意一者和/或至少两者的组合，第一凹曲线为抛物线、悬链线、圆弧、三角函数曲线、反三角函数曲线、指数函数曲线、对数函数曲线以及样条曲线中的任意一者和/或至少两者的组合。
本申请的实施方式中，第一凸曲线和第一凹曲线均为抛物线，相交曲面为双曲抛物面。
本申请的实施方式中，第一波纹结构和第二波纹结构正交设置或者斜交设置。
本申请的实施方式中，第一波纹结构包括与相交曲面连接的至少一第一波纹和至少一第二波纹，第二波纹结构包括与相交曲面连接的至少一第三波纹和至少一第四波纹，第一波纹为第二凸曲线沿第一准线平移形成的曲面结构，第二波纹为第三凸曲线沿第二准线平移形成的曲面结构，第三波纹为第二凹曲线沿第三准线平移形成的曲面结构，第四波纹为第三凹曲线沿第四准线平移形成的曲面结构。
本申请的实施方式中，第二凸曲线和第三凸曲线均与第一凸曲线相同；第二凹曲线和第三凹曲线均与第一凹曲线相同。
本申请的实施方式中，第一准线为位于与板体平行的第一平面内的直线或曲线；第二准线为位于与板体平行的第二平面内的直线或曲线；第三准线为位于与板体平行的第三平面内的直线或曲线；第四准线为位于与板体平行的第四平面内的直线或曲线。
本申请的实施方式中，第一平面和第二平面为同一平面；第三平面和第四平面为同一平面。
本申请的实施方式中，第一波纹结构为等宽延伸设置的波纹结构；或者第一波纹结构包括渐缩延伸设置或渐扩延伸设置的波纹段；第二波纹结构为等宽延伸设置的波纹结构；或者第二波纹结构包括渐缩延伸设置或渐扩延伸设置的波纹段。
本申请的实施方式中，第一波纹结构和第二波纹结构的跨度范围均为1mm～1000mm。
本申请的实施方式中，第一波纹结构的凸设高度范围和第二波纹结构的凹设深度范围均 为1mm～500mm。
本申请的实施方式中，板体的厚度范围为0.1mm～10mm。
本申请提供一种薄膜板的优化方法，用于对上述薄膜板进行优化，包括以下步骤：调节优化参数，从而改变薄膜板的结构参数；其中，优化参数为第一波纹结构、第二波纹结构以及相交曲面的数学表达式中的至少一参数；获得薄膜板的性能参数；重复上述步骤，直至性能参数达到预设值。
本申请的实施方式中，相交曲面的数学表达式为双曲抛物面的数学方程，优化参数包括相交曲面的数学表达式的至少一常数。
本申请的实施方式中，结构参数包括第一波纹结构、第二波纹结构以及相交曲面的尺寸、形状、曲率、波峰高度、波谷深度和/或最大跨度。
本申请的实施方式中，性能参数包括第一波纹结构、第二波纹结构以及相交曲面的位移补偿能力、强度、疲劳性能和/或递进变形性能。
本申请的实施方式中，获得薄膜板的性能参数，包括以下步骤：根据调整后的优化参数以及相交曲面的数学表达式，建立薄膜板的三维模型；利用薄膜板的三维模型仿真计算获得其性能参数。
本申请的实施方式中，性能参数达到预设值之后，还包括以下步骤：根据最终调整确定的优化参数以及相交曲面的目标数学表达式。
本申请还提供一种薄膜容器，包括至少一上述薄膜板。
本申请的特点及优点是：
本申请的薄膜板及薄膜容器，通过在板体上设置相对凸起的第一波纹结构和相对凹陷的第二波纹结构以及连接第一波纹结构和第二波纹结构的相交曲面，并通过定义由一凸曲线和一凹曲线限定形成的设计曲面，通过第一波纹结构和第二波纹结构与该设计曲面相贯形成相交曲面，一方面能使第一波纹结构、第二波纹结构以及相交曲面共同配合提高薄膜板的位移补偿能力，从而有利于提高薄膜容器的液密性和气密性；另一方面有利于降低板体在压型相交曲面时的延伸率、成型减薄量小以及残余应力小，使其定型后结构尺寸稳定；再一方面能通过限定凹曲线和凸曲线便能实现对设计曲面的限定，进而也就能实现对相交曲面的限定，从而便于实现通过调节数学表达式的参数来优化工程结构的性能，以及便于实现模具加工和薄膜板的压型制造，因此有利于降低设计及制造的成本和难度，且成型精度易于控制。
本申请的薄膜板的优化方法，利用第一波纹结构、第二波纹结构和相交曲面的数学表达式中的至少一参数作为优化参数，通过调整优化参数来改变薄膜板的结构参数，从而能实现对薄膜板的性能优化，使薄膜板的性能符合设计要求。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例一中薄膜板的立体示意图；
图2为本申请实施例一中设计曲面与第一凸曲线和第一凹曲线的关系示意图；
图3为本申请实施例一中相交曲面与相贯线的关系示意图；
图4为本申请实施例一中薄膜板的俯视图；
图5为本申请实施例一中薄膜板的侧视图；
图6为本申请实施例一中薄膜板的正视图；
图7为本申请实施例二中薄膜板的立体示意图；
图8为本申请实施例三中薄膜板的俯视图；
图9为本申请实施例三中相交曲面的立体示意图；
图10为本申请实施例四中薄膜板的立体示意图；
图11为本申请实施例五中薄膜板的立体示意图；
图12为本申请实施例六中薄膜板的立体示意图；
图13为本申请实施例六中薄膜板的设计曲面的立体示意图；
图14为本申请实施例六中相交曲面的立体示意图；
图15为本申请实施例七中薄膜板的立体示意图；
图16为本申请中对相交曲面进行优化设计的示意图；
图17本申请中薄膜容器的局部示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
实施方式一
结合图1、图2以及图3所示，本申请提供一种薄膜板100，包括板体1，板体1上设有第一波纹结构2、第二波纹结构3以及至少一相交曲面4，第一波纹结构2凸起设置，第二波 纹结构3凹陷设置，且第一波纹结构2和第二波纹结构3通过相交曲面4交叉设置；其中，定义一设计曲面5，设计曲面5为第一凸曲线A1沿第一凹曲线B1平移且第一凸曲线A1的顶点在第一凹曲线B1上滑动形成的曲面结构，第一波纹结构2和第二波纹结构3能与设计曲面5相贯，且相贯线X围合形成相交曲面4。
由于第一波纹结构2和第二波纹结构3与设计曲面5相交形成的交线即为相贯线X，因此，第一波纹结构2和第二波纹结构3与设计曲面5的相贯线X即为相交曲面4的外轮廓线；其中，第一波纹结构2沿第一凹曲线B1的顶点处的切线Q2方向与设计曲面5相贯，第二波纹结构3沿第一凸曲线A1的顶点处的切线Q1方向与设计曲面5相贯，使得第一波纹结构2、第二波纹结构3以及相交曲面4的位移补偿能力能够配合得更加协调。
应当说明的是，本申请定义第一凸曲线A1沿第一凹曲线B1平移且第一凸曲线A1的顶点在第一凹曲线B1上滑动形成的设计曲面5，只是为了清楚地描述本申请的薄膜板100所具有的相交曲面4这一结构的形状，而设计曲面5并非本申请的薄膜板100所具有的结构。并且对于形状相同而描述方式不同的相交曲面4也应在本申请的保护范围内。
此外，第一波纹结构2和第二波纹结构3并非限定为必须朝特定方向弯曲和延伸的波纹结构，而是为了便于描述，将沿不同方向延伸且相对于板体1朝相反方向弯曲的两个波纹结构，其中一个定义为第一波纹结构2，如图视角下的波峰结构；另一个定位为第二波纹结构3，如图视角下的波谷结构。
具体的，第一波纹结构2包括至少一凸曲线沿至少两准线平移形成的相同或不同的至少一第一波纹21和至少一第二波纹22，至少第一波纹21和至少第二波纹22通过至少一相交曲面4相连接。第二波纹结构3包括至少一凹曲线沿至少两准线平移形成的相同或不同的至少一第三波纹31和至少一第四波纹32，至少一第三波纹31和至少一第四波纹32通过至少一相交曲面4相连接。其中，第一波纹21和第二波纹22沿第一凹曲线B1的顶点处的切线Q2方向与设计曲面5相贯形成相连接的第一相贯线X1和第二相贯线X2，第三波纹31和第三波纹32沿第一凸曲线A1的顶点处的切线Q1方向与设计曲面5相贯形成相连接的第三相贯线X3和第四相贯线X4。
本申请的薄膜板100，通过在板体1上设置相对凸起的第一波纹结构2和相对凹陷的第二波纹结构3以及连接第一波纹结构2和第二波纹结构3的相交曲面4，并通过定义由一凸曲线A1和一凹曲线B1限定形成的设计曲面5，通过第一波纹结构2和第二波纹结构3与该设计曲面5相贯形成相交曲面4，一方面能使第一波纹结构2、第二波纹结构3以及相交曲面4共同配合提高薄膜板100的位移补偿能力，从而有利于提高薄膜容器的液密性和气密性；另一方面有利于降低板体1在压型相交曲面4时的延伸率、成型减薄量小以及残余应力小， 使其定型后结构尺寸稳定；再一方面能通过限定设计曲面5的凹曲线和凸曲线便能实现对相交曲面4的限定，从而便于实现通过调节数学表达式的参数来优化工程结构的性能，以及便于实现模具加工和薄膜板的压型制造，因此有利于降低设计及制造的成本和难度，且成型精度易于控制。
结合图2和图3所示，本申请的实施方式中，相交曲面4和设计曲面5可以完全相同，即第一波纹结构2和第二波纹结构3与设计曲面5的相贯线X即为设计曲面5的外轮廓线。当然，相交曲面4也可以是设计曲面5的一部分。
板体1大体呈一平面板。板体1的形状不具体限定；可以如本申请的实施例中设置为正方形；也可以如本申请的其他实施例中设置为长方形、梯形、三角形、弧形或其他形状。具体的，板体1的厚度范围为0.1mm～10mm，优选0.1mm～3mm。
结合图4、图5及图6所示，本申请的实施方式中，相交曲面4的中心点O1，也即凸曲线A1的顶点和凹曲线B1的顶点相交的交点，可以与板体1的平面基准点O2齐平设置，使得相交曲面4在板体1上压制成型时，延伸率小、成型减薄量小、残余应力小，相交曲面4定型后结构尺寸更稳定。当然也可以存在高度差。
对于限定第一波纹结构2的凸曲线、限定第二波纹结构3的凹曲线，第一波纹结构2和第三波纹结构3之间的交叉角度，以及第一波纹结构2中多个波纹之间的分布角度以及第二波纹结构3的多个波纹之间的分布角度均可以不具体限定，只需使第一波纹结构2的多个波纹以及第二波纹结构3的多个波纹均能与相交曲面4相贯即可。例如，第一波纹结构2和第二波纹结构3为沿两直线方向延伸的波纹结构，第一波纹结构2和第二波纹结构3可以正交设置，大体呈“十”字形；也可以斜交设置，大体呈“Ⅹ”字形。
并且，板体1上第一波纹结构2的波纹数量、第二波纹结构3的波纹数量以及相交曲面4的数量均可以不具体限定，只需第一波纹结构2的一第一波纹21、一第二波纹22以及第二波纹结构3的第三波纹31和第四波纹32与一相交曲面4连接即可。第一波纹结构2的波纹数量和第二波纹结构3的波纹数量可以相同，例如，分别均为两个，第一波纹结构2的两个波纹沿一方向排布并与一相交曲面4连接，第二波纹结构3的两个波纹沿另一方向排布并与该相交曲面4连接。第一波纹结构2的波纹数量和第二波纹结构3的波纹数量也可以不相同，交叉呈网格状，例如，第一波纹结构2的三个波纹沿一方向排布并通过两个相交曲面4相连接，第二波纹结构3的四个波纹两两为一组，两组波纹与两相交曲面4相连接；又例如，第一波纹结构2的四个波纹沿一方向排布并通过三个相交曲面4相连接，第二波纹结构3的六个波纹两两为一组，三组波纹与三个相交曲面4连接。
具体的，第一波纹21为第二凸曲线A2沿第一准线Z1平移形成的曲面结构，第二波纹 22为第三凸曲线A3沿第二准线Z2平移形成的曲面结构，第三波纹31为第二凹曲线B2沿第三准线Z3平移形成的曲面结构，第四波纹32为第三凹曲线B3沿第四准线Z4平移形成的曲面结构。
其中，第二凸曲线A2和第三凸曲线A3可以相同，也可以不同，并且第二凸曲线A2和第三凸曲线A3可以均与第一凸曲线A1相同，也可均不同；同样的，第二凹曲线B2和第三凹曲线B3可以相同，也可以不同，并且可以均与第一凹曲线B1相同，也可以均不同。
其中，第一准线Z1和第二准线Z2可以相同，也可以不同；同样的，第三准线Z3和第四准线Z4可以相同，也可以不同；此外，第一准线Z1可以为位于与板体1平行的第一平面内的直线或曲线；第二准线Z2可以为位于与板体1平行的第二平面内的直线或曲线；第三准线Z3可以为位于与板体1平行的第三平面内的直线或曲线；第四准线Z4可以为位于与板体1平行的第四平面内的直线或曲线。并且，第一平面和第二平面可以为同一平面，也可以为板体1的上方的具有高度差的两个平面；同样的，第三平面和第四平面可以为同一平面，也可以为板体1的下方的具有高度差的两个平面。因此，第一波纹21、第二波纹22、第三波纹31以及第四波纹32的延伸长度可以具体限定，可以相同，也可以不同。
具体的，第一波纹结构2和第二波纹结构3的跨度范围(也即波峰或波谷宽度)均为1mm～1000mm。第一波纹结构2相对于板体1凸起的高度(也即波峰高度)和第二波纹结构3相对于板体1凹陷的深度(也即波谷深度)均为1mm～500mm。
此外，第一波纹结构2可以为等宽延伸设置的波纹结构，即限定第一波纹结构2的凸曲线在平移过程中跨度恒定不变；第一波纹结构2也可以包括渐缩延伸设置或渐扩延伸设置的波纹段，即限定第一波纹结构2的凸曲线在平移过程中跨度逐渐减小或增大而形成有渐变的波纹段；同样的，第二波纹结构3可以为等宽延伸设置的波纹结构，即限定第二波纹结构3的凹曲线在平移过程中跨度恒定不变；或者第二波纹结构3包括渐缩延伸设置或渐扩延伸设置的波纹段，即限定第二波纹结构3的凹曲线在平移过程中跨度逐渐减小或增大而形成有渐变的波纹段。
本申请的实施方式中，为了避免相交曲面4与第一波纹结构2和第二波纹结构3的连接处出现应力集中的现象，相交曲面4与第一波纹21和第二波纹22之间通过第一过渡曲面相连接，相交曲面4与第三波纹31和第三波纹32之间通过第二过渡曲面相连接。具体的，第一过渡曲面包括第一圆弧过渡面，第二过渡曲面包括第二圆弧过渡面，其中，第一圆弧过渡面可以为凸曲线A1沿一圆弧平移形成的曲面结构，第二圆弧过渡面可以为凹曲线B1沿一圆弧平移形成的曲面结构。相交曲面4在切线Q2方向上的两端通过两第一圆弧过渡面与第一波纹21和第二波纹22连接。相交曲面4在切线Q1方向上的两端通过两第二圆弧过渡面与 第三波纹31和第四波纹32连接。
不论是限定相交曲面4的凹曲线和凸曲线，还是限定第一波纹结构2的凸曲线和限定第二波纹结构3的凸曲线，均可以不具体限定，但为了便于加工和设计，本申请提供一些数学描述方式，以采用数学表达式能实现对相交曲面4、第一波纹结构2以及第二波纹结构3精确的描述，从而能根据数学表达式实现对相交曲面4、第一波纹结构2以及第二波纹结构3的精确加工，也可以通过调整数学表达式中的参数实现对薄膜板100的结构的调整，进而实现对薄膜板100的性能的优化，从而有利于对薄膜板100进行建模、应力分析、结构设计、理论计算、模具加工、压型制造等工作。其中，具体的优化方法在实施方式二中进行描述，在此先不赘述。具体的：
限定相交曲面4的凹曲线A1和凸曲线B1，以及限定第一波纹结构2的任一凸曲线和限定第二波纹结构3的任一凸曲线，均可以通过泰勒公式(Taylor公式)拟合来确定其数学表达式。泰勒公式能拟合获得多种曲线的数学表达式，包括数学表达式已经标准化的抛物线、悬链线、圆弧、三角函数、反三角函数曲线、指数函数曲线、对数函数曲线以及样条曲线，还包括数学表达式未标准化的其他曲线。
其中，泰勒公式可用n次多项式近似表达多种曲线函数，在一定误差范围内可近似拟合该函数的某一定义域内的曲线。例如采用泰勒公式将下述表达式近似拟合为余弦曲线：
此外，限定相交曲面4的凹曲线A1和凸曲线B1，以及限定第一波纹结构2的任一凸曲线和限定第二波纹结构3的任一凹曲线，均可以为抛物线、悬链线、圆弧、三角函数曲线、反三角函数曲线、指数函数曲线、对数函数曲线以及样条曲线中的任意一者，即由一种数学表达方描述的曲线；或者至少两者的组合，即限定相交曲面4的凹曲线A1和凸曲线B1，以及限定第一波纹结构2的任一凸曲线和限定第二波纹结构3的任一凹曲线，可以为数学表达式不同的多个曲线段连接而成的曲线。
为了便于理解和实施本申请，下面提供一些优选实施例：
如图1至图6所示的实施例一，为本申请的一种典型和特殊的优选实施例，特点在于：
限定第一波纹结构2的凸曲线和限定相交曲面4的凸曲线相同，即两者的数学表达式相同；限定第二波纹结构3的凹曲线和限定相交曲面4的凸曲线相同，即两者的数学表达式相同。因此，通过限定一凹曲线和一凸曲线，便能实现对第一波纹结构2、第二波纹结构3以及相交曲面4三者的形状进行限定，因此更易于数学描述，从而有利于进行薄膜板100的加 工和设计。
第一波纹结构2中多个波纹和第二波纹结构3中多个波纹之间的分布角度为90度，即第一波纹结构2的轴线和第二波纹结构3的轴线互相正交，使第一波纹结构2、第二波纹结构3以及相交曲面4共同配合能进一步地提高薄膜板100的位移补偿能力，从而进一步地提高薄膜容器的液密性和气密性。
相交曲面4与设计曲面5的形状完全相同，且限定第一波纹结构2的凸曲线，限定第二波纹结构3的凹曲线，以及限定相交曲面4的凹曲线和凸曲线均为抛物线，即设计曲面5和相交曲面4为相同的双曲抛物面，从而能通过更简单的数学表达式对一凹曲线和一凸曲线进行数学描述。
因此，本实施例的薄膜板100就可以简化为：开口相反的两抛物分别沿互相正交的两准线平移滑动便能形成第一波纹结构2、第二波纹结构3以及相交曲面4，最终和板体1组成了薄膜板100。
具体的，定义第一设计准线，该第一设计准线包括相连接的第一直线段(也即第一准线Z1)、第一中间曲线段(也即凹曲线B1)以及第二直线段(也即第二准线Z2)；其中，第一直线段和第二直线段沿切线Q2方向延伸设置，第一中间曲线段与凹曲线B1相同；凸曲线A1作为母线依次沿第一直线段、第一中间曲线段以及第二直线段平移且凸曲线的顶点在第一设计准线上滑动，从而依次形成一第一波纹21、相交曲面4以及一第二波纹22；同理，定义第二设计准线，该第二设计准线包括相连接的第三直线段(也即第三准线Z3)、第二中间曲线段(也即凸曲线A1)以及第四直线段(也即第三准线Z4)；其中，第三直线段和第四直线段沿切线Q1延伸设置，第二中间曲线段与凸曲线相同；凹曲线作为母线依次沿第三直线段、第二中间曲线段以及第四直线段平移且凹曲线的顶点在第二设计准线上滑动，从而依次形成一第三波纹31、同一相交曲面4以及第四波纹32。相交曲面4的中心点O1与板体1的平面基准点O2齐平设置。
其中，相交曲面4的数学表达式可以为z/h＝x2/a-y2/b；当然由于数学表达式的形式不同以及x、y、z三个变量的值域、定义域的取值范围也不同，使得相交曲面4可以具有不同的形状。
如图7所示的实施例二，与实施例一的区别在于：
第一凸曲线A1、第二凸曲线A2、第三凸曲线A3、第一凹曲线B1、第二凹曲线B2以及第三凹曲线B3均为圆弧，也即第一波纹21、第二波纹22、第三波纹31以及第四波纹32均为圆柱面的一部分，而相交曲面4则为圆环面的一部分。
如图8和图9所示的实施例三，与实施例一的区别在于：
第一波纹结构2中多个波纹和第二波纹结构3中多个波纹之间的分布角度非90度，也即第一波纹结构2和第二波纹结构3非正交设置。具体的，第一凸曲线A1与第一凹曲线B1之间的夹角非90度。
如图10所示的实施例四，与实施例一的区别在于：
第一波纹结构2和/或第二波纹结构3非等宽延伸的波纹结构。第一波纹结构2和/或第二波纹结构3非直线延伸的波纹结构。具体的，第二波纹结构3中的第三波纹31包括与相交曲面4连接并等宽延伸的第一等宽波纹段311、与第一等宽波纹段311连接并渐缩延伸的渐缩波纹段312以及与渐缩波纹段312连接并等宽延伸的第二等宽波纹段313，其中第一等宽波纹段311的宽度(也即跨度)大于第二等宽波纹段313的宽度。第二波纹结构3中的第二波纹22为一凹曲线沿平行于板体1的平面内的曲线(也即第四准线Z4为曲线)平移形成。
如图11所示的实施例五，与实施例一的区别在于：
第一波纹结构2的第一波纹21和第二波纹22非同轴设置和/或第二波纹结构3的第三波纹31和第四波纹32的非同轴设置。具体的，限定第三波纹31的第三准线Z3所在的平行于板体1的第三平面和限定第四波纹32的第四准线Z4所在的平行于板体1的第四平面为同一平面，而第三准线Z3和第四准线Z4为该平面内的两平行线。当然，第三准线Z3和第四准线Z4为平行的两平面内的两平行线，即两者在板体1的厚度方向上存在高度差。
如图12、图13以及图14所示的实施例六，与实施例一的区别在于：
限定第一波纹21的凸曲线、限定第二波纹22的凸曲线、限定第三波纹31的凸曲线和/或限定第四波纹32的凸曲线非抛物线。设计曲面5为双曲抛物面。相交曲面4非双曲抛物面，并且为设计曲面5的一部分。具体的，限定第一波纹21的凸曲线、限定第二波纹22的凸曲线、限定第三波纹31的凸曲线以及限定第四波纹32的凸曲线均包括圆弧线段C1以及与圆弧线段C1的两端连接的两抛物线段C2。设计曲面5的数学表达式为z＝x*y。第一波纹21、第二波纹22、第三波纹31以及第四波纹32与该设计曲面5相贯的相贯线X围合形成相交曲面4。
如图15所示的实施例七，与实施例一的区别在于：
相交曲面4的中心点O1与板体1的平面基准点O2之间存在高度差。具体的，第一波纹结构2的凸起高度高于第二波纹结构3的凹陷深度，相应的，相交曲面4的中心点O1位于板体1的平面基准点O2的上方。
实施方式二
结合图16所示，本申请还提供一种薄膜板100的优化方法，用于对上述薄膜板100进行 优化，包括以下步骤：调节优化参数，从而改变薄膜板100的结构参数；其中，优化参数为第一波纹结构2、第二波纹结构3以及相交曲面4的数学表达式中的至少一参数；获得薄膜板100的性能参数；重复上述步骤，直至性能参数达到预设值。
本申请的薄膜板100的优化方法，利用相交曲面4的数学表达式中的至少一参数作为优化参数，通过调整优化参数来改变薄膜板100的结构参数，从而能实现对薄膜板100的性能优化，使薄膜板100的性能符合设计要求。
由于相交曲面4的形状是由第一凸曲线A1和第一凹曲线B1决定的，而结合图1至图3所示，某些特殊情况下第一凸曲线A1又等同于第二凸曲线A2和第三凸曲线A3，第一凹曲线B1又分别等同于第二凹曲线B2和第三凹曲线B3，因此，相交曲面4的数学表达式一旦确定，则第一凸曲线A1和第一凹曲线B1的数学表达式也就确定，亦即第二凸曲线A2和第三凸曲线A3以及第二凹曲线B2和第三凹曲线B3的数学表达式也就确定，也就是说，通过限定一凹曲线和一凸曲线便能实现对相交曲面4、第一波纹结构2以及第二波纹结构3三者的限定。进一步地，通过调整相交曲面4的数学表达式中的参数，在改变相交曲面4的结构的同时，第一波纹结构2和第二波纹结构3的结构也会相应的改变，从而改变薄膜板100的结构参数。如图15所示，优化参数调整后，相交曲面4改变为相交曲面4’的形状，相应的，第一凸曲线A1改变为第一凸曲线A1’，第一凹曲线B1改变为第一凹曲线B1’。
结合图1至图3所示，本申请的一些实施例中，第一凸曲线A1、第二凸曲线A2、第三凸曲线A3以及第一凹曲线B1、第二凹曲线B2和第三凹曲线B3均为抛物线，因此，相交曲面4的数学表达式为双曲抛物面的数学方程，优化参数包括相交曲面4的数学方程的至少一常数。具体的，相交曲面4的具体数学方程与建立的基准坐标系有关，因此可以不具体限定。如本实施例中，相交曲面4的数学方程为双曲抛物面的标准方程：z/h＝x2/a2-y2/b2，其中，可以选取常数h、常数a以及常数b其中一个或多个常数作为进行调整的优化参数，如实施例中，常数h和常数b固定不变，仅选取常数a作为优化参数进行调整。并且为了限定相交曲面4在交叉的两方向上的跨度以及凹设的深度，对变量x、变量y以及变量z的取值范围进行限定。
如本申请的另一些实施例中，相交曲面4的数学表达式还可以为如下型式：或者
其中，可以选取常数h、常数v、常数u、常数a以及常数b其中一个或多个常数作为进行调整的优化参数。
本申请的实施方式中，结构参数包括第一波纹结构2、第二波纹结构3以及相交曲面4的尺寸、形状、曲率、波峰高度、波谷深度和/或最大跨度。
本申请的实施方式中，获得薄膜板100的性能参数，包括以下步骤：根据调整后的优化参数以及相交曲面4的数学表达式，建立薄膜板100的三维模型；利用薄膜板100的三维模型仿真计算获得其性能参数。其中，性能参数包括第一波纹结构2、第二波纹结构3以及相交曲面4的位移补偿能力、强度、疲劳性能和/或递进变形性能。
由此可知，本申请对薄膜板100进行优化，可以先基于三维模型进行理论研究，仿真计算获得性能参数，进而判断是否可以满足工程需求；而无需先制造出薄膜板100的实物，再基于薄膜板100的实物进行实验来获得其性能参数，或者先通过三维扫描等方法将薄膜板100的实物扫描为三维模型，再经过修模等操作，才能得到与薄膜板100的实物比较接近的三维模型，最后再基于该三维模型进行理论研究；因此，本申请对薄膜板100进行优化的过程简单且成本低，从而利于薄膜板100的迭代，使其更符合设计要求。
如图16所示，本申请的实施例中，通过对常数a进行调整，分别获得了a＝1时的相交曲面4以及a＝0.5时的相交曲面4’，进而获得两种薄膜板100的性能参数，发现当a＝1和a＝0.5时获得的相交曲面4和相交曲面4’在应用于薄膜板100上所能实现的位移补偿能力、所表现出的强度、稳定性等性能有所差异。因此，基于这样的调整思路，便可以通过调整数学表达式的参数来对薄膜板100进行优化，使其性能可以满足工程需求。并且，通过调整数学表达式的参数进行优化可以使薄膜板100在不同方向上具有不同性能，为适用不同的工程需求提供了可操作、可精确计算和设计的方法。此外，由于本申请中薄膜板100的主要功能就是在保持一定的强度和稳定性的前提下，实现交叉的两方向(如两正交方向)的位移补偿功能，而在交叉的两方向上所需要补偿的位移量可以根据工程需求设置为相同或不同，因此，基于这样的调整思路实现薄膜板100进行优化，使薄膜板100在交叉的两方向上的位移补偿功能均达到设计要求。
本申请的实施方式中，性能参数达到预设值之后，还包括以下步骤：根据最终调整确定的优化参数以及相交曲面4的目标数学表达式，加工出薄膜板100。具体的，先根据调整后确定的优化参数以及相交曲面4的目标数学表达式开设压型模具，然后利用该压型模具将板体1压制成具有第一波纹结构2、第二波纹结构3以及相交曲面4的薄膜板100。
实施方式三
如图17所示，本申请还提供一种薄膜容器，包括至少一薄膜板100。本实施方式中薄膜板100与实施方式一中薄膜板100的具体结构、工作原理以及有益效果均相同，在此不再赘 述。其中，薄膜板100上的第一波纹结构2和第二波纹结构3，其中一个朝罐内凹设，另一个朝罐外凹设。
具体的，通过多个薄膜板100拼接制成薄膜容器的柔性内罐。为便于根据所需拼接成的形状将薄膜板100进行裁剪，如本实施例中将方形的薄膜板100的四个角落进行切边；还可以将薄膜板100的任意侧边进行压边操作后将其压平后进行焊接。
以上所述仅为本申请的几个实施例，本领域的技术人员依据申请文件公开的内容可以对本申请实施例进行各种改动或变型而不脱离本申请的精神和范围。

Claims (20)

  1. 一种薄膜板，其特征在于，包括板体，所述板体上设有第一波纹结构、第二波纹结构以及至少一相交曲面，所述第一波纹结构凸起设置，所述第二波纹结构凹陷设置，且所述第一波纹结构和所述第二波纹结构通过所述相交曲面交叉设置；
    其中，定义一设计曲面，所述设计曲面为第一凸曲线沿第一凹曲线平移且所述第一凸曲线的顶点在所述第一凹曲线上滑动形成的曲面结构，所述第一波纹结构和所述第二波纹结构能与所述设计曲面相贯，且相贯线围合形成所述相交曲面。
  2. 根据权利要求1所述的薄膜板，其特征在于，
    所述第一凸曲线和所述第一凹曲线均为能通过泰勒公式拟合的曲线。
  3. 根据权利要求1所述的薄膜板，其特征在于，
    所述第一凸曲线为抛物线、悬链线、圆弧、三角函数曲线、反三角函数曲线、指数函数曲线、对数函数曲线以及样条曲线中的任意一者和/或至少两者的组合，所述第一凹曲线为抛物线、悬链线、圆弧、三角函数曲线、反三角函数曲线、指数函数曲线、对数函数曲线以及样条曲线中的任意一者和/或至少两者的组合。
  4. 根据权利要求1所述的薄膜板，其特征在于，
    所述第一凸曲线和所述第一凹曲线均为抛物线，所述相交曲面为双曲抛物面。
  5. 根据权利要求1所述的薄膜板，其特征在于，
    所述第一波纹结构和所述第二波纹结构正交设置或者斜交设置。
  6. 根据权利要求1至5中任一项所述的薄膜板，其特征在于，
    所述第一波纹结构包括与所述相交曲面连接的至少一第一波纹和至少一第二波纹，所述第二波纹结构包括与所述相交曲面连接的至少一第三波纹和至少一第四波纹，所述第一波纹为第二凸曲线沿第一准线平移形成的曲面结构，所述第二波纹为第三凸曲线沿第二准线平移形成的曲面结构，所述第三波纹为第二凹曲线沿第三准线平移形成的曲面结构，所述第四波纹为第三凹曲线沿第四准线平移形成的曲面结构。
  7. 根据权利要求6所述的薄膜板，其特征在于，
    所述第二凸曲线和所述第三凸曲线均与所述第一凸曲线相同；所述第二凹曲线和所述第三凹曲线均与所述第一凹曲线相同。
  8. 根据权利要求6所述的薄膜板，其特征在于，
    所述第一准线为位于与所述板体平行的第一平面内的直线或曲线；
    所述第二准线为位于与所述板体平行的第二平面内的直线或曲线；
    所述第三准线为位于与所述板体平行的第三平面内的直线或曲线；
    所述第四准线为位于与所述板体平行的第四平面内的直线或曲线。
  9. 根据权利要求8所述的薄膜板，其特征在于，
    所述第一平面和所述第二平面为同一平面；所述第三平面和所述第四平面为同一平面。
  10. 根据权利要求1至5中任一项所述的薄膜板，其特征在于，
    所述第一波纹结构为等宽延伸设置的波纹结构；或者所述第一波纹结构包括渐缩延伸设置或渐扩延伸设置的波纹段；
    所述第二波纹结构为等宽延伸设置的波纹结构；或者所述第二波纹结构包括渐缩延伸设置或渐扩延伸设置的波纹段。
  11. 根据权利要求1所述的薄膜板，其特征在于，
    所述第一波纹结构和所述第二波纹结构的跨度范围均为1mm～1000mm。
  12. 根据权利要求1所述的薄膜板，其特征在于，
    所述第一波纹结构的凸设高度范围和所述第二波纹结构的凹设深度范围均为1mm～500mm。
  13. 根据权利要求1所述的薄膜板，其特征在于，
    所述板体的厚度范围为0.1mm～10mm。
  14. 一种薄膜板的优化方法，其特征在于，用于对权利要求1至13中任一项所述的薄膜板进行优化，包括以下步骤：
    调节优化参数，从而改变所述薄膜板的结构参数；其中，所述优化参数为所述第一波纹结构、所述第二波纹结构以及所述相交曲面的数学表达式中的至少一参数；
    获得所述薄膜板的性能参数；
    重复上述步骤，直至所述性能参数达到预设值。
  15. 根据权利要求14所述的薄膜板的优化方法，其特征在于，
    所述相交曲面的数学表达式为双曲抛物面的数学方程，所述优化参数包括所述相交曲面的数学表达式的至少一常数。
  16. 根据权利要求14所述的薄膜板的优化方法，其特征在于，
    所述结构参数包括所述第一波纹结构、所述第二波纹结构以及所述相交曲面的尺寸、形状、曲率、波峰高度、波谷深度和/或最大跨度。
  17. 根据权利要求14所述的薄膜板的优化方法，其特征在于，
    所述性能参数包括所述第一波纹结构、所述第二波纹结构以及所述相交曲面的位移补偿能力、强度、疲劳性能和/或递进变形性能。
  18. 根据权利要求14所述的薄膜板的优化方法，其特征在于，所述获得所述薄膜板的性 能参数，包括以下步骤：
    根据调整后的所述优化参数以及所述相交曲面的数学表达式，建立所述薄膜板的三维模型；
    利用所述薄膜板的三维模型仿真计算获得其性能参数。
  19. 根据权利要求14所述的薄膜板的优化方法，其特征在于，所述性能参数达到预设值之后，还包括以下步骤：根据最终调整确定的所述优化参数以及所述相交曲面的目标数学表达式。
  20. 一种薄膜容器，其特征在于，包括至少一权利要求1至13中任一项所述的薄膜板。
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CN109482725A (zh) * 2018-11-30 2019-03-19 宁波凯荣船用机械有限公司 薄膜型液化天然气液货舱维护系统不锈钢波纹板生产线及制作工艺
CN112145954A (zh) * 2020-09-21 2020-12-29 浙江振申绝热科技股份有限公司 一种膜式低温储罐的金属内罐的罐底结构
CN116401726A (zh) * 2023-06-08 2023-07-07 北京理工大学 一种基于曲面密度分布的梯度极小曲面结构的设计方法

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