Topology optimization method for nonlinear dynamic system structure of high-speed light-load mechanism

Abstract

The invention discloses a method for carrying out structural topological optimization on nonlinear dynamic systems of high-speed light-load mechanisms. According to the method, the number of linear static structure optimization iterations in an ESLM (equivalent static loads method) is restricted according to the minimum number of iterations required by the structural topological optimization, so that the modifier in the optimization is restricted, the model error caused by equivalent load is reduced, and the structural topological optimization of the high-speed light-load mechanisms on the basis of structure restricted modified ESLM. According to the method, the equivalent load is considered as a function of a design variable, the optimization model is reconstructed, and a corresponding solving method is proposed, so that the residual amplitude is reduced as much as possible while the optimization condition is satisfied, compared with the standard equivalent static load, the amplitude under the same movement condition can be reduced by a half, the performance of the high-speed light-load mechanisms can be greatly improved and different design requirements of the high-speed light-load mechanisms can be satisfied.

Description

technical field [0001] The invention belongs to the technical field of structural optimization design of mechanical components, and in particular relates to a topology optimization method for a nonlinear dynamic system structure of a high-speed light-load mechanism. Background technique [0002] The precision movement of high-speed mechanism mainly involves two indexes of movement speed and movement precision. Among them, for high-speed mechanisms, when the motion acceleration reaches a certain level, the dynamic characteristics of the mechanism will change greatly, that is, the mechanism will show a "flexible" characteristic, which will lead to a high degree of nonlinearity of the mechanism under these working conditions , which brings great difficulties to the follow-up dynamic analysis and optimization of the mechanism. [0003] When the mechanism moves at high speed, the rigid body motion and elastic vibration are coupled with each other, which can be considered as a fl...

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Problems solved by technology

[0035] The purpose of the present invention is to avoid the deficiencies in the prior art and provide a topology optimization method for the nonlinear dynamic system structure of the high-speed light-load mechanism. Loading agency issues

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