Finite element modeling method for flexible bionic wing containing spring unit

A modeling method and spring element technology, applied in the field of finite element modeling of flexible bionic wings, can solve problems such as the inability to accurately reflect mechanical properties such as the stiffness distribution and deformation of insect wings, and achieve the effect of linear or nonlinear relationship.

Pending Publication Date: 2019-08-09
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of bionic wing model is directly connected by the way of consolidation or hinge between the skeletons, which cannot accurately reflect the mechanical properties of the overall stiffness distribution and deformation of insect wings.

Method used

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  • Finite element modeling method for flexible bionic wing containing spring unit
  • Finite element modeling method for flexible bionic wing containing spring unit
  • Finite element modeling method for flexible bionic wing containing spring unit

Examples

Experimental program
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Effect test

Embodiment 1

[0087] A finite element modeling method for a flexible bionic wing with spring elements, comprising at least the following steps:

[0088] (1) Establish model A and model B by drawing sketches and generating components;

[0089] (2) Give the components section properties and material parameters, respectively, to create assemblies;

[0090] (3) Set constraints and bind model A and model B to model C;

[0091] (4) Define the spring element, select the two-node spring element Spring2, and set the stiffness of each node in the direction of different degrees of freedom;

[0092] (5) Define analysis steps, set boundary conditions, apply loads, and divide meshes;

[0093] (6) Create a job and submit the calculation.

[0094] In the step (1), a model A is established, and the model A is a bionic wing skeleton structure. According to the topological distribution of the wing veins on an insect wing with a uniform distribution of the aspect ratio in the spanwise direction, a rectangul...

Embodiment 2

[0119] A finite element modeling method for a flexible bionic wing with spring elements, comprising at least the following steps:

[0120] (1) Establish model A and model B by drawing sketches and generating components;

[0121] (2) Give the components section properties and material parameters, respectively, to create assemblies;

[0122] (3) Set constraints and bind model A and model B to model C;

[0123] (4) Define the spring element, select the two-node spring element Spring2, and set the stiffness of each node in the direction of different degrees of freedom;

[0124] (5) Define analysis steps, set boundary conditions, apply loads, and divide meshes;

[0125] (6) Create a job and submit the calculation.

[0126] In the step (1), a model A is established, and the model A is a bionic wing skeleton structure. According to the topological distribution of the wing veins on the spanwise linearly reduced insect wings according to the aspect ratio, a triangular bionic wing skel...

Embodiment 3

[0151] A finite element modeling method for a flexible bionic wing with spring elements, comprising at least the following steps:

[0152] (1) Establish model A and model B by drawing sketches and generating components;

[0153] (2) Give the components section properties and material parameters, respectively, to create assemblies;

[0154] (3) Set constraints and bind model A and model B to model C;

[0155] (4) Define the spring element, select the two-node spring element Spring2, and set the stiffness of each node in the direction of different degrees of freedom;

[0156] (5) Define analysis steps, set boundary conditions, apply loads, and divide meshes;

[0157] (6) Create a job and submit the calculation.

[0158] In the step (1), a model A is established, and the model A is a bionic wing skeleton structure, and a quarter elliptical bionic wing is drawn according to the topological distribution of the wing veins on the spanwise nonlinear reduced insect wings according t...

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Abstract

A finite element modeling method for a flexible bionic wing with a spring unit at least comprises the following steps of (1) drawing a sketch, generating the components, and establishing a model A anda model B; (2) respectively endowing the cross section property and the material parameters of the components, and creating an assembly body; (3) setting the constraint conditions, and binding the model A and the model B as a model C; (4) defining the spring unit, selecting two node spring units Spring2, and respectively setting the rigidity of each node in different degree-of-freedom directions;(5) defining an analysis step, setting a boundary condition, applying a load, and dividing grids; and (6) creating a job, and submitting calculation.

Description

technical field [0001] The invention relates to a finite element modeling method, in particular to a finite element modeling method of a flexible bionic wing with two-node spring elements. Background technique [0002] Insect wings in nature are thin and soft, and have excellent structural properties, which are the main imitation objects of bionic wings. Among them, the flexibility of the wings is not only related to the material, but also benefits from the connection between the wing veins. Experiments show that abundant soft matter is distributed in the vein nodes of most insect wings. Its elastic modulus is significantly lower than that of the veins and membranes, and it has high elasticity. The traditional modeling methods of bionic wings mainly focus on the two main components of the wings, the veins and the wing membrane. They lack detailed settings and often ignore the soft matter and flexibility at the nodes of the veins. This bionic wing model is directly connect...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 侯丹李佳施伟辰顾邦平张奇
Owner SHANGHAI MARITIME UNIVERSITY
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