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Flexible mechanism joint topology optimization method based on MATLAB and APDL

A flexible mechanism and topology optimization technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as computational difficulty, and achieve high computational efficiency, easy operation, and strong versatility

Inactive Publication Date: 2019-07-26
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a joint topology optimization method for flexible mechanisms based on MATLAB and APDL. In order to solve the problem of computational difficulty caused by geometric nonlinearity generated during the output process of large elastic deformations of flexible mechanisms, This method considers using finite element analysis software ANSYS for geometric nonlinear calculation, and numerical calculation software MATLAB for topology optimization iterative process

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  • Flexible mechanism joint topology optimization method based on MATLAB and APDL
  • Flexible mechanism joint topology optimization method based on MATLAB and APDL
  • Flexible mechanism joint topology optimization method based on MATLAB and APDL

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[0028] The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0029] A kind of flexible mechanism joint topology optimization method based on MATLAB and APDL of the present invention comprises the following steps:

[0030] Step 1: Establish a topology optimization model of the flexible mechanism. This method uses the solid isotropic material penalty model (SIMP) as the topology optimization model. The target optimization area can be known from the given initial conditions in the design, which is defined as the design domain Φ, and the area Φ is discretized into n finite elements by using the finite element analysis software ANSYS. After discretization, export the discrete information (unit number, node coordinates) and define x i is the pseudo density corresponding to the i-th discrete unit, v i is the volume of the i-th discrete unit, and is...

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Abstract

The invention discloses a flexible mechanism joint topology optimization method based on MATLAB and APDL. A topological optimization model of a flexible mechanism and a finite element analysis model of the flexible mechanism are established. Finite element analysis software ANSYS is used for carrying out geometric nonlinear calculation, and numerical calculation software MATLAB is used for carrying out a topological optimization iteration process. Complex nonlinear finite element analysis is completed by professional finite element analysis software, and numerical calculation is completed by professional numerical software. The advantages of all software are utilized to the maximum extent, the calculation efficiency is greatly improved, and the programming difficulty is reduced. The solving precision is guaranteed. The method has the advantages of high universality, simplicity and convenience in operation, high calculation efficiency and the like.

Description

technical field [0001] The invention relates to the field of structural design of flexible mechanisms, in particular to a combined topology optimization method for flexible mechanisms based on MATLAB and APDL. Background technique [0002] Flexible mechanism refers to a new type of mechanism that uses the elastic deformation of materials to transmit or convert motion, force or energy. The concept of flexible mechanism was first proposed by Buens et al. in 1968. In the following fifty years, a large number of research results on its basic theoretical methods emerged. At present, there are two relatively systematic and mature methods, which are pseudo-rigid body model method and topology optimization method. [0003] The pseudo-rigid body model method was first proposed by Howell et al. in 1994. Its core idea is: first convert the flexible mechanism into a rigid mechanism with torsion spring, and then use the analysis and design method of the rigid mechanism to obtain the req...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06
Inventor 葛文杰张子昂张亚青周蓉易朱旭耀
Owner NORTHWESTERN POLYTECHNICAL UNIV
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