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High speed light-load mechanism nonlinear dynamic system structure evolution optimization method

A non-linear dynamic and system structure technology, applied in multi-objective optimization, design optimization/simulation, special data processing applications, etc., can solve problems such as not being able to adapt to high-speed light-load mechanisms, and achieve the effect of meeting design requirements and improving performance

Inactive Publication Date: 2016-02-17
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0034] The purpose of the present invention is to avoid the deficiencies in the prior art and provide a high-speed light-load mechanism nonlinear dynamic system structure evolution optimization method to solve the problem that the existing method ignores the influence of inertial loads in the structure optimization process and cannot be adapted to high-speed light-load mechanisms. Loading agency issues

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  • High speed light-load mechanism nonlinear dynamic system structure evolution optimization method
  • High speed light-load mechanism nonlinear dynamic system structure evolution optimization method
  • High speed light-load mechanism nonlinear dynamic system structure evolution optimization method

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[0055] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. And the features in the embodiments can be combined with each other.

[0056]The core of the present invention is to provide a high-speed light-load mechanism nonlinear dynamic system structure evolution optimization method, which can directly calculate the element strain energy sensitivity information for nonlinear dynamic analysis, directly obtain the element strain energy at each time point, and After normalization, the strain energies at all time points are superimposed to obtain the comprehensive sensitivity of all discrete points, and the evolutionary structure method is used to modify the structure, then update the structure, re-do nonlinear analysis, and repeat the above process until the optimization goal accomplish...

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Abstract

The invention discloses a high speed light-load mechanism nonlinear dynamic system structure evolution optimization method. The method aims at a nonlinear kinetic analysis to directly calculate sensitivity information of element strain energy and directly obtain the element strain energy at each time point, the strain energy at all the time points is superposed after normalization processing, the comprehensive sensitivity for measuring all discrete points is obtained, structure modification is performed by adopting an evolutionary structural method, then the structure is updated, the nonlinear analysis is performed again, and the process is repeated until an optimal object is realized. According to the method disclosed by the invention, the equivalent load calculation is omitted, and the change on inertial load by structural modification is directly reflected into a model to obtain a more optimal optimization result. According to the method disclosed by the invention, the equivalent static load is considered as a function of a design variable, and a corresponding calculation method is proposed, compared with a standard equivalent static load, the amplitude in the same movement condition can be lowered by half, and the performance of the high speed light-load mechanism is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of structural optimization design of mechanical components, and in particular relates to a method for structural evolution optimization of a nonlinear dynamic system 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...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23G06F2111/06
Inventor 杨志军陈超然陈新吴柏生
Owner GUANGDONG UNIV OF TECH
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