CN112035963A - Cabin door structure design method - Google Patents
Cabin door structure design method Download PDFInfo
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Abstract
The application belongs to the technical field of cabin door structural design, and particularly relates to a cabin door structural design method, which comprises the following steps: establishing a three-dimensional solid model of the cabin door by taking the cabin door contour curved surface as a reference; establishing a cabin door finite element model based on the cabin door three-dimensional entity model; defining design variables, constraint conditions and objective functions, and submitting OptiStruct analysis to obtain an optimal material distribution scheme of the cabin door structure; determining a hatch door structure based on the optimal material distribution scheme.
Description
Technical Field
The application belongs to the technical field of cabin door structural design, and particularly relates to a cabin door structural design method.
Background
At present, the cabin door structure on the airplane is mostly designed by designers based on experience, and in order to ensure that the cabin door structure can meet the bearing requirement, the design scheme is mostly conservative, so that the cabin door structure mostly has larger weight and does not meet the requirement of weight reduction of the current airplane.
The present application has been made in view of the above-mentioned technical drawbacks.
It should be noted that the above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and the above background disclosure should not be used for evaluating the novelty and inventive step of the present application without explicit evidence to suggest that the above content is already disclosed at the filing date of the present application.
Disclosure of Invention
It is an object of the present application to provide a method of designing a door structure that overcomes or mitigates at least one of the technical disadvantages known to exist.
The technical scheme of the application is as follows:
a method of designing a door structure, comprising:
establishing a three-dimensional solid model of the cabin door by taking the cabin door contour curved surface as a reference;
establishing a cabin door finite element model based on the cabin door three-dimensional entity model;
defining design variables, constraint conditions and objective functions, and submitting OptiStruct analysis to obtain an optimal material distribution scheme of the cabin door structure;
determining a hatch door structure based on the optimal material distribution scheme.
According to at least one embodiment of the present application, in the cabin door structure design method, a cabin door three-dimensional solid model is established with the cabin door contour curved surface as a reference, specifically:
and establishing a three-dimensional solid model of the cabin door by using the cabin door outline curved surface as a reference through the CATIA.
According to at least one embodiment of the present application, in the above cabin door structure design method, based on a cabin door three-dimensional solid model, a cabin door finite element model is established, specifically:
and importing the three-dimensional solid model of the cabin door through Hyperworks, processing the three-dimensional solid model of the cabin door by using a Hypermesh module, and dividing finite element grids to obtain the finite element model of the cabin door.
According to at least one embodiment of the present application, in the door structure design method described above, the design variable includes door structure material distribution.
According to at least one embodiment of the present application, in the door structure design method, the constraint conditions include door displacement, door stress, door stability, door body ratio, door minimum strain energy, and door non-design-able area.
According to at least one embodiment of the present application, in the above door structure design method, the door stability is as follows:
wherein the content of the first and second substances,
m is cabin door stability;
k is a loading coefficient;
e is the elasticity modulus of the cabin door material;
Iymoment of inertia of the cabin door profile around the y axis;
j is the torsion constant of the hatch profile;
l is the length of the door along the y-axis.
According to at least one embodiment of the application, in the door structure design method, the door non-design area includes an area where the door support arm and the door lock bracket are located.
According to at least one embodiment of the application, in the door structure design method described above, the objective function includes door maximum stiffness.
According to at least one embodiment of the present application, in the above door structure design method, determining the door structure based on the optimal material distribution scheme includes:
establishing a cabin door structure model based on the optimal material distribution scheme;
and carrying out static analysis on the cabin door structural model, and designing a cabin door structural reinforcement.
According to at least one embodiment of the present application, in the above-mentioned cabin door structure design method, a static analysis is performed on a cabin door structure model, and a cabin door structure reinforcement is designed, specifically:
and carrying out static analysis on the cabin door structural model to obtain a cabin door structural static analysis diagram, and designing to obtain a cabin door structural reinforcement based on the cabin door structural static analysis diagram.
Drawings
FIG. 1 is a flowchart of a method for designing a door structure according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of a structural model of a door provided in an embodiment of the present application;
FIG. 3 is a diagram of a door structure static analysis provided by an embodiment of the present application;
FIG. 4 is a schematic view of a door structural reinforcement provided in an embodiment of the present application;
figure 5 is a schematic view of the door structural reinforcement provided in an embodiment of the present application disposed within the door skin.
For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; further, the drawings are for illustrative purposes, and terms describing positional relationships are limited to illustrative illustrations only and are not to be construed as limiting the patent.
Detailed Description
In order to make the technical solutions and advantages of the present application clearer, the technical solutions of the present application will be further clearly and completely described in the following detailed description with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only some of the embodiments of the present application, and are only used for explaining the present application, but not limiting the present application. It should be noted that, for convenience of description, only the parts related to the present application are shown in the drawings, other related parts may refer to general designs, and the embodiments and technical features in the embodiments in the present application may be combined with each other to obtain a new embodiment without conflict.
In addition, unless otherwise defined, technical or scientific terms used in the description of the present application shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like used in the description of the present application, which indicate orientations, are used only to indicate relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly, and thus, should not be construed as limiting the present application. The use of "first," "second," "third," and the like in the description of the present application is for descriptive purposes only to distinguish between different components and is not to be construed as indicating or implying relative importance. The use of the terms "a," "an," or "the" and similar referents in the context of describing the application is not to be construed as an absolute limitation on the number, but rather as the presence of at least one. The word "comprising" or "comprises", and the like, when used in this description, is intended to specify the presence of stated elements or items, but not the exclusion of other elements or items.
Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.
The present application is described in further detail below with reference to fig. 1 to 5.
A method of designing a door structure, comprising:
establishing a three-dimensional solid model of the cabin door by taking the cabin door contour curved surface as a reference;
establishing a cabin door finite element model based on the cabin door three-dimensional entity model;
defining design variables, constraint conditions and objective functions, and submitting OptiStruct analysis to obtain an optimal material distribution scheme of the cabin door structure;
determining a hatch door structure based on the optimal material distribution scheme.
For the design method of the cabin door structure disclosed in the above embodiments, it can be understood by those skilled in the art that the optimal material distribution scheme of the cabin door structure is obtained through software optimization, and the specific form of the cabin door structure is determined based on the optimal material distribution scheme of the cabin door structure, so that the whole cabin door structure has higher bearing efficiency, and the redundant mass is effectively eliminated, thereby reducing the whole mass of the cabin door structure.
In some optional embodiments, in the above method for designing a hatch door structure, the three-dimensional solid model of the hatch door is established based on the contour curved surface of the hatch door, and specifically:
and establishing a three-dimensional solid model of the cabin door by using the cabin door outline curved surface as a reference through the CATIA.
In some optional embodiments, in the above method for designing a door structure, a door finite element model is established based on a three-dimensional solid model of the door, specifically:
and importing the three-dimensional solid model of the cabin door through Hyperworks, processing the three-dimensional solid model of the cabin door by using a Hypermesh module, and dividing finite element grids to obtain the finite element model of the cabin door.
In some alternative embodiments, in the door structure design method described above, the design variable comprises door structure material distribution.
In some optional embodiments, in the above door structure design method, the constraint conditions include door displacement, door stress, door stability, door volume fraction, door minimum strain energy, and door non-design-able area.
In some optional embodiments, in the above method for designing a door structure, the door stability is as follows:
wherein the content of the first and second substances,
m is cabin door stability;
k is a loading coefficient;
e is the elasticity modulus of the cabin door material;
Iymoment of inertia of the cabin door profile around the y axis;
j is the torsion constant of the hatch profile;
l is the length of the door along the y-axis.
In some alternative embodiments, in the above-mentioned door design method, the door non-design region includes a region where the door support arm and the door lock bracket are located.
In some alternative embodiments, in the door structure design method described above, the objective function includes door maximizing stiffness.
In some optional embodiments, in the above method for designing a door structure, determining the door structure based on the optimal material distribution scheme includes:
establishing a cabin door structural model based on the optimal material distribution scheme, wherein the specific process can be based on the optimal material distribution scheme, and the cabin door structural model is established by performing regularized design according to engineering manufacturing constraints and structural design principles, determining the thickness of a skin, the thickness of a beam web and the position distribution of the beam web in the cabin door structure and further establishing the cabin door structural model as shown in fig. 2;
and carrying out static analysis on the cabin door structural model, and designing a cabin door structural reinforcement.
In some optional embodiments, in the above method for designing a door structure, a static analysis is performed on a door structure model to design a door structure reinforcement, specifically:
performing static analysis on the cabin door structural model to obtain a cabin door structural static analysis diagram, as shown in fig. 3, designing to obtain a cabin door structural reinforcement based on the cabin door structural static analysis diagram, as shown in fig. 4, wherein the cabin door structural reinforcement can be arranged in a cabin door structural skin, as shown in fig. 5, assisting in load transfer, and preventing the cabin door structure from being unstable.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.
Claims (10)
1. A method of designing a door structure, comprising:
establishing a three-dimensional solid model of the cabin door by taking the cabin door contour curved surface as a reference;
establishing a cabin door finite element model based on the cabin door three-dimensional entity model;
defining design variables, constraint conditions and objective functions, and submitting OptiStruct analysis to obtain an optimal material distribution scheme of the cabin door structure;
determining a hatch door structure based on the optimal material distribution scheme.
2. The door structure design method according to claim 1,
the method comprises the following steps of establishing a cabin door three-dimensional solid model by taking a cabin door contour curved surface as a reference, specifically:
and establishing a three-dimensional solid model of the cabin door by using the cabin door outline curved surface as a reference through the CATIA.
3. The door structure design method according to claim 1,
the method comprises the following steps of establishing a finite element model of the cabin door based on a three-dimensional solid model of the cabin door, specifically:
and importing the three-dimensional solid model of the cabin door through Hyperworks, processing the three-dimensional solid model of the cabin door by using a Hypermesh module, and dividing finite element grids to obtain the finite element model of the cabin door.
4. The door structure design method according to claim 1,
the design variables include hatch door structural material distribution.
5. The door structure design method according to claim 1,
the constraint conditions comprise cabin door displacement, cabin door stress, cabin door stability, cabin door volume fraction ratio, cabin door minimum strain energy and cabin door non-designable area.
6. The door structure design method according to claim 5,
the cabin door stability is as follows:
wherein the content of the first and second substances,
m is cabin door stability;
k is a loading coefficient;
e is the elasticity modulus of the cabin door material;
Iymoment of inertia of the cabin door profile around the y axis;
j is the torsion constant of the hatch profile;
l is the length of the door along the y-axis.
7. The door structure design method according to claim 5,
the cabin door non-design area comprises a cabin door support arm and an area where a cabin door lock bracket is located.
8. The door structure design method according to claim 1,
the objective function includes door maximized stiffness.
9. The door structure design method according to claim 1,
the determining of the door structure based on the optimal material distribution scheme comprises:
establishing a cabin door structure model based on the optimal material distribution scheme;
and carrying out static analysis on the cabin door structural model, and designing a cabin door structural reinforcement.
10. The door structure design method according to claim 9,
carry out static analysis to hatch door structural model, design hatch door structural reinforcement specifically is:
and carrying out static analysis on the cabin door structural model to obtain a cabin door structural static analysis diagram, and designing to obtain a cabin door structural reinforcement based on the cabin door structural static analysis diagram.
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| CN202010947739.9A CN112035963B (en) | 2020-09-10 | 2020-09-10 | Cabin door structure design method |
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Citations (6)
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|---|---|---|---|---|
| US6081654A (en) * | 1998-05-21 | 2000-06-27 | Ford Global Technologies, Inc. | Method and system for designing a vehicle door |
| CN105260505A (en) * | 2015-09-14 | 2016-01-20 | 中国运载火箭技术研究院 | Finite element method based aircraft cabin door seal load computing method |
| CN105760631A (en) * | 2016-03-28 | 2016-07-13 | 大连理工大学 | Structure topology optimization method for implementing diversified designs |
| CN106055782A (en) * | 2016-05-27 | 2016-10-26 | 中铁第四勘察设计院集团有限公司 | Finite element simulating and analyzing method for capsule body strength of tunnel construction escape capsule |
| CN109101711A (en) * | 2018-07-27 | 2018-12-28 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of grid beam construction design method based on Topology Optimization Theory |
| CN110866307A (en) * | 2019-10-25 | 2020-03-06 | 中航西飞民用飞机有限责任公司 | Airplane cabin door mechanism load calculation method |
-
2020
- 2020-09-10 CN CN202010947739.9A patent/CN112035963B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6081654A (en) * | 1998-05-21 | 2000-06-27 | Ford Global Technologies, Inc. | Method and system for designing a vehicle door |
| CN105260505A (en) * | 2015-09-14 | 2016-01-20 | 中国运载火箭技术研究院 | Finite element method based aircraft cabin door seal load computing method |
| CN105760631A (en) * | 2016-03-28 | 2016-07-13 | 大连理工大学 | Structure topology optimization method for implementing diversified designs |
| CN106055782A (en) * | 2016-05-27 | 2016-10-26 | 中铁第四勘察设计院集团有限公司 | Finite element simulating and analyzing method for capsule body strength of tunnel construction escape capsule |
| CN109101711A (en) * | 2018-07-27 | 2018-12-28 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of grid beam construction design method based on Topology Optimization Theory |
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Non-Patent Citations (1)
| Title |
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| 戚振杰等: "炭纤维复合材料应用于汽车后背门的设计与优化", 《武汉科技大学报》, pages 199 - 206 * |
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