WO2018006612A1 - Flexible tooling structure with stringers having changeable positions - Google Patents

Flexible tooling structure with stringers having changeable positions Download PDF

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Publication number
WO2018006612A1
WO2018006612A1 PCT/CN2017/075460 CN2017075460W WO2018006612A1 WO 2018006612 A1 WO2018006612 A1 WO 2018006612A1 CN 2017075460 W CN2017075460 W CN 2017075460W WO 2018006612 A1 WO2018006612 A1 WO 2018006612A1
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flexible tooling
tooling
flexible
longitudinal
distribution
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PCT/CN2017/075460
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French (fr)
Chinese (zh)
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王博
郝鹏
杜凯繁
毕祥军
王斌
张希
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大连理工大学
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Priority to JP2018549802A priority Critical patent/JP6633225B2/en
Publication of WO2018006612A1 publication Critical patent/WO2018006612A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces

Definitions

  • the invention relates to the field of experimental tooling design of main bearing members of aerospace structures, and proposes a flexible tooling structure with variable position of the purlins.
  • the experimental check of the stiffness and strength of the bullet body section is an essential cross section in the structural design process.
  • the experimental load is transmitted to the projectile section of the bullet to be checked through the experimental tooling, and the experimental load distribution is formed.
  • the real load received by the section is transmitted from its adjacent section to form a real Load distribution. Whether the two load distributions are the same or not is related to the accuracy of the calibration experiment.
  • the experimental load distribution of the traditional uniform tooling form is usually uniform, and in order to meet the needs of equipment installation, pipeline laying, heat dissipation, etc., the inevitable opening in the thin-walled reinforced section of the projectile structure affects the symmetry of the structure. The asymmetry of this structure makes the real load distribution uneven.
  • the small-diameter projectile structure has a small diameter-thickness ratio, its asymmetry is weak, and the real load distribution is relatively uniform.
  • the traditional uniform experimental tooling meets the experimental load distribution requirements.
  • the large-diameter, thin-walled, ultra-light and other design requirements of heavy-duty launch vehicles and large aircrafts in China the large-diameter projectiles have a large diameter-thickness ratio, the asymmetry of the structure is significant, and the structural deformation no longer satisfies the flat section assumption.
  • Traditional uniform test tooling has been unable to meet the experimental load distribution requirements. Therefore, the design work of a new generation of experimental tooling is imminent.
  • the invention mainly solves the problem of experimental load distribution simulation of heavy-duty launch vehicle in China, and proposes a flexible tooling structure with variable position of the purlin to realize the accurate simulation of the experimental load distribution.
  • the utility model comprises a flexible tool upper end frame, a flexible tool lower end frame, a flexible tooling horizontal beam and a flexible tool longitudinal stringer.
  • the upper and lower end frames and the horizontal and vertical girders can be manufactured by a welding process.
  • the flexible tooling transverse beam and the flexible tooling vertical beam are alternately distributed to form a grid type.
  • the upper end of the flexible tooling lateral beam extends from the upper end frame of the flexible tooling, and the lower end of the flexible tooling lateral beam extends from the lower end frame of the flexible tooling.
  • the longitudinal distribution of the flexible tooling is determined according to the experimental load distribution to be simulated, and the flexible tooling transverse beam is evenly distributed along the axial direction.
  • Flexible tooling The longitudinal stringer distribution is variable, and the number of flexible tooling longitudinal stringers is determined by the experimental load distribution to be simulated.
  • Flexible tooling transverse girders and flexible tooling The diameter of the cylindrical surface of the longitudinal beam is the same as the diameter of the section to be tested connected thereto.
  • the horizontal purlin and the longitudinal purlin are both rectangular cross sections.
  • the flexible tooling structure of the present invention Uniform experimental tooling for the calibration experiment distributes the load evenly to the section to be checked, resulting in unrealistic load distribution of the calibration experiment, affecting the accuracy of the calibration experiment, and proposing flexible tooling with variable position of the purlin. structure.
  • the flexible tooling stiffness distribution has designability, which makes the stiffness distribution of the flexible tooling consistent with the stiffness distribution of the real boundary, greatly improving the force transmission path of the experimental tooling and improving The accuracy of the cylinder structure check experiment.
  • Figure 1 is a schematic view of the structure of the present invention.
  • FIG. 2( a ) is a structural view of a flexible tooling according to an embodiment of the present invention.
  • Figure 2 (b) is a real boundary tooling structure diagram.
  • Figure 3 (a) is a comparison of the axial displacement index of the real boundary tool and the conventional tooling according to the embodiment of the present invention
  • Figure 3 (b) For comparison between the axial displacement indexes of the real boundary tool and the flexible tooling according to the embodiment of the present invention.
  • the invention adopts the aluminum alloy material to manufacture a flexible tooling structure with variable position of the purlin, and achieves the purpose of accurate simulation of the experimental load distribution.
  • a flexible tooling structure with variable position of a purlin includes a flexible tool upper end frame 1 and a flexible tool lower end frame 2 , flexible tooling horizontal purlins 3 and flexible tooling vertical purlins 4 .
  • the flexible structure can be fabricated by a welding process.
  • the transverse purlins are staggered with the longitudinal purlins to form a grid type.
  • the upper end of the transverse beam extends from the upper end frame, and the lower end of the lateral beam extends out of the lower end frame.
  • the longitudinal beam distribution is determined according to the experimental load distribution to be simulated, and the longitudinal beam distribution is variable.
  • the number of said longitudinal beams is determined according to the experimental load distribution to be simulated.
  • the lateral beams are evenly distributed along the axial direction.
  • transverse girders and the longitudinal girders have the same cylindrical surface diameter as the diameter of the section to be tested connected thereto.
  • the transverse beam and the longitudinal stringer are both rectangular cross sections.
  • FIG. 2(a) and 2(b) are comparison diagrams of a flexible tooling structure and a real boundary tooling structure according to an embodiment of the present invention
  • the present invention gives a comparison diagram of the flexible tooling structure and the real boundary structure of the embodiment, the flexible tooling structure including the section to be checked 5 and the flexible tooling 6
  • the real boundary structure consists of a check section 5 and a real boundary section 7 .
  • the diameter of the section to be checked is 2 meters, the height is 2.4 meters, the height of the flexible tooling is 0.8 meters, and the longitudinal beam distribution angle is [14.67, 16.81, 3.54, 3.35, 7.25, 3.92, 3.70, 3.14, 16.78] , true boundary diameter 2 m, height 2.4 m, opening height 0.6 Meter, opening width 0.6 m.

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  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

Disclosed is a flexible tooling structure with stringers having changeable positions, which belongs to the technical field of experiment tooling of main bearing members of aerospace structures. The flexible tooling structure comprises a flexible tooling upper end frame (1), a flexible tooling lower end frame (2), flexible tooling transverse stringers (3) and flexible tooling longitudinal stringers (4). The flexible tooling longitudinal stringers (4) having changeable positions are used for simulating experiment load distribution conditions. By changing the distribution angles of the longitudinal stringers (4), the designability of the rigidity distribution of the flexible tooling can be achieved such that the rigidity distribution of the flexible tooling is consistent with the rigidity distribution of the real boundary, so that the force transmission path of the experiment tooling is significantly improved, and the accuracy of the check experiment of a cylindrical shell structure is improved.

Description

一种桁条位置可变的柔性工装结构 Flexible tooling structure with variable purlin position
技术领域 Technical field
本发明涉及 航空航天结构主承力构件实验工装设计领域 ，提出一种桁条位置可变的柔性工装结构。 The invention relates to the field of experimental tooling design of main bearing members of aerospace structures, and proposes a flexible tooling structure with variable position of the purlins.
背景技术 Background technique
弹箭体部段刚度和强度的实验校核是结构设计过程中必不可少的横节。实验载荷通过实验工装传递到待校核的弹箭体部段上，形式实验载荷分布，而弹箭体结构服役过程中，部段受到的真实载荷由其相邻部段传递而来，形成真实载荷分布。两种载荷分布相同与否关系到校核实验的准确性。传统均匀工装形式的实验载荷分布通常是均匀的，而为满足设备安装、管线铺设、散热等需要，弹箭体结构的薄壁加筋部段中不可避免地存在的开口影响了结构的对称性，这种结构的非对称性使得真实载荷分布不均匀。小直径弹箭体部段结构具有较小的径厚比，其非对称性弱，真实载荷分布较均匀，传统的均匀实验工装满足实验载荷分配需求。但伴随我国重型运载火箭和大飞机的大直径、薄壁、超轻等设计需求，大直径弹箭体具有较大的径厚比，结构的非对称性显著，结构变形不再满足平截面假设，传统的均匀实验工装已经不能满足实验载荷分配需求。因此，新一代的实验工装设计工作迫在眉睫。 The experimental check of the stiffness and strength of the bullet body section is an essential cross section in the structural design process. The experimental load is transmitted to the projectile section of the bullet to be checked through the experimental tooling, and the experimental load distribution is formed. When the projectile is in service, the real load received by the section is transmitted from its adjacent section to form a real Load distribution. Whether the two load distributions are the same or not is related to the accuracy of the calibration experiment. The experimental load distribution of the traditional uniform tooling form is usually uniform, and in order to meet the needs of equipment installation, pipeline laying, heat dissipation, etc., the inevitable opening in the thin-walled reinforced section of the projectile structure affects the symmetry of the structure. The asymmetry of this structure makes the real load distribution uneven. The small-diameter projectile structure has a small diameter-thickness ratio, its asymmetry is weak, and the real load distribution is relatively uniform. The traditional uniform experimental tooling meets the experimental load distribution requirements. However, with the large-diameter, thin-walled, ultra-light and other design requirements of heavy-duty launch vehicles and large aircrafts in China, the large-diameter projectiles have a large diameter-thickness ratio, the asymmetry of the structure is significant, and the structural deformation no longer satisfies the flat section assumption. Traditional uniform test tooling has been unable to meet the experimental load distribution requirements. Therefore, the design work of a new generation of experimental tooling is imminent.
发明内容 Summary of the invention
本发明主要解决我国重型运载火箭实验载荷分布模拟问题，提出一种桁条位置可变的柔性工装结构，实现实验载荷分布的准确模拟的目的。 The invention mainly solves the problem of experimental load distribution simulation of heavy-duty launch vehicle in China, and proposes a flexible tooling structure with variable position of the purlin to realize the accurate simulation of the experimental load distribution.
为实现上述目的，本发明采用的技术方案是： In order to achieve the above object, the technical solution adopted by the present invention is:
一种桁条位置可变的柔性工装结构 ， 包括柔性工装上端框、柔性工装下端框、柔性工装横向桁条和柔性工装纵向桁条。上下端框及横纵桁条可由焊接工艺来加工制造。柔性工装横向桁条与柔性工装纵向桁条交错分布，形成格栅型。柔性工装横向桁条的上端延伸出柔性工装上端框，柔性工装横向桁条的下端延伸出柔性工装下端框。 a flexible tooling structure with variable purlin position, The utility model comprises a flexible tool upper end frame, a flexible tool lower end frame, a flexible tooling horizontal beam and a flexible tool longitudinal stringer. The upper and lower end frames and the horizontal and vertical girders can be manufactured by a welding process. The flexible tooling transverse beam and the flexible tooling vertical beam are alternately distributed to form a grid type. The upper end of the flexible tooling lateral beam extends from the upper end frame of the flexible tooling, and the lower end of the flexible tooling lateral beam extends from the lower end frame of the flexible tooling.
其中，所述的 柔性工装 纵向桁条分布根据待模拟的实验载荷分布而确定， 柔性工装 横向桁条沿着轴向均匀分布。 柔性工装 纵向桁条分布可变， 柔性工装 纵向桁条的数目根据待模拟的实验载荷分布而确定。 柔性工装 横向桁条和 柔性工装 纵向桁条所在圆柱面直径与其连接的待实验部段的直径相同。 Wherein, the longitudinal distribution of the flexible tooling is determined according to the experimental load distribution to be simulated, and the flexible tooling transverse beam is evenly distributed along the axial direction. Flexible tooling The longitudinal stringer distribution is variable, and the number of flexible tooling longitudinal stringers is determined by the experimental load distribution to be simulated. Flexible tooling transverse girders and flexible tooling The diameter of the cylindrical surface of the longitudinal beam is the same as the diameter of the section to be tested connected thereto.
其中， 所述的横向桁条和纵向桁条均为矩形截面。 Wherein, the horizontal purlin and the longitudinal purlin are both rectangular cross sections.
本发明的柔性工装结构， 针对校核实验采用的均匀实验工装将载荷均匀的分配到待校核部段上，导致了校核实验载荷分配不真实，影响校核实验的准确性问题，提出桁条位置可变的柔性工装结构。该结构通过优化设计技术，改变纵向桁条的分布角度，实现柔性工装刚度分布具有可设计性，使得柔性工装的刚度分布与真实边界的刚度分布一致，大幅改善实验工装的传力路径，并提高筒壳结构校核实验的准确性。 The flexible tooling structure of the present invention, Uniform experimental tooling for the calibration experiment distributes the load evenly to the section to be checked, resulting in unrealistic load distribution of the calibration experiment, affecting the accuracy of the calibration experiment, and proposing flexible tooling with variable position of the purlin. structure. By optimizing the design technology and changing the distribution angle of the longitudinal beam, the flexible tooling stiffness distribution has designability, which makes the stiffness distribution of the flexible tooling consistent with the stiffness distribution of the real boundary, greatly improving the force transmission path of the experimental tooling and improving The accuracy of the cylinder structure check experiment.
附图说明 DRAWINGS
图 1 为 本发明的结构示意图。 Figure 1 is a schematic view of the structure of the present invention.
图 2 （ a ）为本发明实施例柔性工装结构图； 2( a ) is a structural view of a flexible tooling according to an embodiment of the present invention;
图 2 （ b ）为真实边界工装结构图。 Figure 2 (b) is a real boundary tooling structure diagram.
图 3 （ a ） 为本发明实施例真实边界工装与传统工装的轴向位移指标对比图； 图 3 （ b ） 为本发明实施例真实边界工装与柔性工装的轴向位移指标对比图。 Figure 3 (a) is a comparison of the axial displacement index of the real boundary tool and the conventional tooling according to the embodiment of the present invention; Figure 3 (b) For comparison between the axial displacement indexes of the real boundary tool and the flexible tooling according to the embodiment of the present invention.
图中： 1 柔性工装上端框； 2 柔性工装下端框； 3 柔性工装纵向桁条； 4 柔性工装横向桁条； 5 待校核部段； 6 柔性工装； 7 真实边界部段。 In the figure: 1 flexible tool upper end frame; 2 flexible tooling lower end frame; 3 flexible tooling vertical beam; 4 flexible tooling horizontal beam; 5 Pending section; 6 flexible tooling; 7 true boundary section.
具体实施方式 detailed description
下面结合附图和实施例对本发明进行详细说明。 The invention will now be described in detail in conjunction with the drawings and embodiments.
本发明采用铝合金材料制造一种桁条位置可变的柔性工装结构， 实现实验载荷分布的准确模拟的目的。 The invention adopts the aluminum alloy material to manufacture a flexible tooling structure with variable position of the purlin, and achieves the purpose of accurate simulation of the experimental load distribution.
参考图 1 ，根据本发明提供的桁条位置可变的柔性工装结构，包括柔性工装上端框 1 、柔性工装下端框 2 、柔性工装横向桁条 3 和柔性工装纵向桁条 4 。该柔性结构可由焊接工艺来加工制造。横向桁条与纵向桁条交错分布，形成格栅型。横向桁条的上端延伸出上端框，横向桁条的下端延伸出下端框。 Referring to FIG. 1, a flexible tooling structure with variable position of a purlin according to the present invention includes a flexible tool upper end frame 1 and a flexible tool lower end frame 2 , flexible tooling horizontal purlins 3 and flexible tooling vertical purlins 4 . The flexible structure can be fabricated by a welding process. The transverse purlins are staggered with the longitudinal purlins to form a grid type. The upper end of the transverse beam extends from the upper end frame, and the lower end of the lateral beam extends out of the lower end frame.
其中，所述的纵向桁条分布根据待模拟的实验载荷分布而确定，纵向桁条分布可变。 Wherein, the longitudinal beam distribution is determined according to the experimental load distribution to be simulated, and the longitudinal beam distribution is variable.
其中，所述的纵向桁条的数目根据待模拟的实验载荷分布而确定。 Wherein, the number of said longitudinal beams is determined according to the experimental load distribution to be simulated.
其中， 所述的横向桁条沿着轴向均匀分布。 Wherein, the lateral beams are evenly distributed along the axial direction.
其中，所述的横向桁条和纵向桁条所在圆柱面直径与其连接的待实验部段的直径相同。 其中， 所述的横向桁条和纵向桁条均为矩形截面。 Wherein, the transverse girders and the longitudinal girders have the same cylindrical surface diameter as the diameter of the section to be tested connected thereto. among them, The transverse beam and the longitudinal stringer are both rectangular cross sections.
图 2 （ a ）和图 2 （ b ） 为本发明实施例柔性工装结构与真实边界工装结构对比图； 参考图 2 （ a ）和图 2 （ b ），本发明给出了实施例柔性工装结构与真实边界结构对比图，柔性工装结构包括 待校核部段 5 和柔性工装 6 ；真实边界结构包括带校核部段 5 和真实边界部段 7 。待校核部段直径 2 米，高度 2.4 米，柔性工装高度 0.8 米，纵向桁条分布角度为 [14.67, 16.81, 3.54, 3.35, 7.25, 3.92, 3.70, 3.14, 16.78] ，真实边界直径 2 米，高度 2.4 米，开口高度 0.6 米，开口宽度 0.6 米。 2(a) and 2(b) are comparison diagrams of a flexible tooling structure and a real boundary tooling structure according to an embodiment of the present invention; (a) and FIG. 2(b), the present invention gives a comparison diagram of the flexible tooling structure and the real boundary structure of the embodiment, the flexible tooling structure including the section to be checked 5 and the flexible tooling 6 The real boundary structure consists of a check section 5 and a real boundary section 7 . The diameter of the section to be checked is 2 meters, the height is 2.4 meters, the height of the flexible tooling is 0.8 meters, and the longitudinal beam distribution angle is [14.67, 16.81, 3.54, 3.35, 7.25, 3.92, 3.70, 3.14, 16.78] , true boundary diameter 2 m, height 2.4 m, opening height 0.6 Meter, opening width 0.6 m.
参考图 3 （ a ）和图 3 （ b ），本发明给出的柔性工装结构模拟的载荷分布于真实载荷分布相同，而传统的均匀工装与真实载荷分布明显不同。这说明，本发明 使得柔性工装的刚度分布与真实边界的刚度分布一致，大幅改善实验工装的传力路径，并提高筒壳结构校核实验的准确性。 Refer to Figure 3 (a) and Figure 3 (b) The load distribution of the flexible tooling structure simulated by the present invention is the same as the real load distribution, and the conventional uniform tooling is significantly different from the real load distribution. This illustrates the invention The stiffness distribution of the flexible tooling is consistent with the stiffness distribution of the real boundary, the force transmission path of the experimental tooling is greatly improved, and the accuracy of the cylinder structure checking experiment is improved.

Claims (2)

1. 一种桁条位置可变的柔性工装结构 ，其特征在于， 包括柔性工装上端框、柔性工装下端框、柔性工装横向桁条和柔性工装纵向桁条；柔性工装横向桁条与柔性工装纵向桁条交错分布，形成格栅型；柔性工装横向桁条的上端延伸出柔性工装上端框，柔性工装横向桁条的下端延伸出柔性工装下端框；A flexible tooling structure having a variable position of a purlin, characterized in that The utility model comprises an upper end frame of a flexible tooling, a lower end frame of a flexible tooling, a transverse beam of a flexible tooling and a longitudinal beam of a flexible tooling; the transverse beam of the flexible tooling is arranged alternately with the longitudinal beam of the flexible tooling to form a grid type; the upper end of the transverse beam of the flexible tooling is extended. The upper end frame of the flexible tooling is extended, and the lower end of the lateral beam of the flexible tooling extends out of the lower end frame of the flexible tooling;
所述的 柔性工装 纵向桁条分布根据待模拟的实验载荷分布而确定， 柔性工装 纵向桁条分布可变， 柔性工装 纵向桁条的数目根据待模拟的实验载荷分布而确定；The flexible tooling longitudinal string distribution is determined according to the experimental load distribution to be simulated, and the flexible tooling longitudinal string distribution is variable, flexible tooling The number of longitudinal beams is determined according to the experimental load distribution to be simulated;
所述的 柔性工装 横向桁条沿着轴向均匀分布；The flexible tooling transverse beam is evenly distributed along the axial direction;
所述的 柔性工装 横向桁条和 柔性工装 纵向桁条所在圆柱面直径与其连接的待实验部段的直径相同。The flexible tooling transverse stringer and the flexible tooling longitudinal cylindrical stringer have the same diameter as the diameter of the section to be tested connected thereto.
根据权利要求 1 所述的一种桁条位置可变的柔性工装结构，其特征在于，所述的横向桁条和纵向桁条均为矩形截面。 According to claim 1 The flexible tooling structure with variable position of the purlin is characterized in that the transverse purlin and the longitudinal purlin are both rectangular cross sections.
PCT/CN2017/075460 2016-07-06 2017-03-02 Flexible tooling structure with stringers having changeable positions WO2018006612A1 (en)

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CN201610529077.7A CN105954092B (en) 2016-07-06 2016-07-06 A kind of position-variable flexible frock structure of stringer

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CN105954092B (en) * 2016-07-06 2018-07-13 大连理工大学 A kind of position-variable flexible frock structure of stringer
CN112857762B (en) * 2020-12-29 2023-05-23 中国航空工业集团公司西安飞机设计研究所 Transition section for semi-ellipsoidal structural strength test

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