Uncertainty-based robustness analysis method and system

An uncertainty and analysis method technology, applied in the field of robustness analysis system based on uncertainty, can solve problems such as not considering a large number of uncertain factors, failing to meet structural requirements, slow calculation speed, etc., to improve reliability and robustness, improving optimization speed, and simplifying the optimization process

Active Publication Date: 2018-01-19
NORTHWESTERN POLYTECHNICAL UNIV
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[0003] The purpose of traditional structural optimization design is to optimize a certain performance of the structure under the constraint conditions, but the input variables, objective functions and constraint functions are all deterministic, and the influence of a large number of uncertain factors that exist objectively is not considered. The optimal solution obtained by the optimization design may be very sensitive to these uncertain factors, and these uncertain factors are unavoidable in most cases
Therefore, the optimization method based on determinism cannot meet the struct

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  • Uncertainty-based robustness analysis method and system
  • Uncertainty-based robustness analysis method and system
  • Uncertainty-based robustness analysis method and system

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[0045] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details being omitted, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solutio...

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Abstract

The invention provides an uncertainty-based robustness analysis method and system. The method comprises the following steps of: determining a plurality of input variables according to position of a mechanism component and judging whether each input variable is an uncertainty input variable or not; when the input variables are uncertainty input variables, calculating a significance measurement index, to output response, of each input variable through an internal model; and obtaining a target input variable according to the significance measurement indexes, and carrying out robustness analysis on a preset system according to the target input variable and a robustness optimization model. According to the method and system, the input variables can be decreased through the significance measurement indexes, and the optimization model can be simplified, so that the efficiency of structural robustness analysis is improved.

Description

technical field [0001] The present disclosure relates to the technical field of structural optimization design, in particular to an uncertainty-based robustness analysis method and an uncertainty-based robustness analysis system. Background technique [0002] The working environment of random vibration will lead to dynamic strength failure problems such as loosening, leakage and cracks of connecting parts in the aviation hydraulic piping system. In order to improve the dynamic characteristics of aviation hydraulic pipelines, it is generally necessary to set a series of support and restraint components on the system to reduce the vibration of the pipeline system, and the position of the support and constraint components will directly affect the reliability of the hydraulic pipeline system. Therefore, it is necessary to optimize the structural robustness of the hydraulic piping system by optimizing the position of the support and restraint components. [0003] The purpose of ...

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IPC IPC(8): G06F17/50
Inventor 周长聪岳珠峰张政唐成虎王文选刘付超
Owner NORTHWESTERN POLYTECHNICAL UNIV
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