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Method for layout optimal design of multi-assembly structure system

A layout optimization and design method technology, applied in computing, special data processing applications, instruments, etc., can solve time-consuming problems, achieve the effects of saving computing time, shortening the design cycle, and improving the efficiency of analysis and optimization design

Inactive Publication Date: 2010-04-21
JIANGSU WELM TECH +1
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  • Abstract
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Problems solved by technology

[0006] In order to overcome the time-consuming deficiency of the prior art multi-component structure system layout optimization design, the present invention provides a multi-component structure system layout optimization design method, by perturbing the finite element node position and stiffness matrix, avoiding repeated finite element Modeling and analysis process that can improve design efficiency and reduce time-consuming design process for layout optimization of multi-component structural systems

Method used

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  • Method for layout optimal design of multi-assembly structure system
  • Method for layout optimal design of multi-assembly structure system
  • Method for layout optimal design of multi-assembly structure system

Examples

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Embodiment 1

[0015] Example 1: Semi-analytical sensitivity of the overall strain energy of a structural system to geometric parameters.

[0016] The layout optimization problem of a multi-component structural system in a typical static environment is defined as follows:

[0017] find : η = ( η 1 , η 2 , . . . , η n ) , s = x 1 y 1 θ 1 x 2 y 2 ...

Embodiment 2

[0046] Example 2: Semi-analytical sensitivity of structural system first order frequency to geometric parameters.

[0047] The layout optimization problem of a multi-component structural system in a typical dynamic environment is defined as follows:

[0048] find : η = ( η 1 , η 2 , . . . , η n ) , s = x 1 y 1 θ 1 x 2 y 2 ...

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Abstract

The invention discloses a method for the layout optimal design of a multi-assembly structure system, which is used for solving semi-analytical sensitivity of geometric parameters in the layout optimal design of a multi-assembly structure system. The method comprises the following steps of: dividing a finite element model of the multi-assembly structure system into three parts: structure lattice, assembly lattice and transition lattice; respectively evaluating influences of different geometric parameter perturbations on the three parts of lattices as well as a rigidity matrix and a quality matrix thereof to obtain the semi-analytical sensitivity of the rigidity matrix and the quality matrix; and further obtaining the sensitivity of various design indexes by derivation. Compared with the finite differential method for the traditional layout optimal design, the semi-analytical method of the invention effectively avoids the finite element solving process after the geometric parameter perturbations are updated, saves the time for sensitivity analysis and optimal design, shortens the cycle of the layout optimal design of the multi-assembly structure system, and enhances design efficiency.

Description

technical field [0001] The invention relates to an optimization design method, in particular to a multi-component structure system layout optimization design method. Background technique [0002] The document "Integrated layout design of the multi-component system, Zhu J.H., Zhang W.H., BeckersP., International Journal for Numerical Methods in Engineering. 2009, 78(6): 631-651" discloses a multi-component structure system layout optimization Design method, which combines structural topology optimization technology and filling layout optimization technology, defines the pseudo-density variable describing the structural topology and the geometric parameters describing the position and direction of components as design variables at the same time, and uses the stiffness of the structure as the design index to achieve The location layout of the components in a certain filling area and the form of the supporting connection structure are designed at the same time. [0003] Since t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 朱继宏张卫红张桥
Owner JIANGSU WELM TECH
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