Three-section circular arc primitive corrugated pipe analysis method based on variance sensitiveness sorting

Abstract

The invention relates to a three-section circular arc primitive corrugated pipe analysis method based on variance sensitiveness sorting. The method is characterized in that geometrical characteristics of a multi-layer three-section circular arc primitive tangent corrugated pipe are symmetrically defined, and geometrical parameters of the corrugated pipe are decoupled; a nonlinear finite element analysis program of the multi-layer three-section circular arc primitive tangent corrugated pipe is built based on parameter languages, and modeling, network processing, loading, postprocessign and other finite element calculation steps can be rapidly achieved by freely changing model parameters; a parametric simulation control platform is built, an orthogonal test design module, a parametric finite element simulation module and a sensitiveness analysis module are integrated, large-sample and multi-target optimal calculation can be achieved, and sensitiveness indexes of design modules can be rapidly and systemically obtained. The systematicness and reliability of structural parameter optimization and sensitiveness analysis are improved; on the basis of a platform control technology and a parametric simulation technology, the labor cost is greatly saved, and calculation efficiency is improved.

Description

technical field [0001] The invention relates to a three-segment circular arc primitive bellows analysis method based on variance sensitivity sorting, which belongs to the field of overall structure design of liquid rocket engines, and is especially suitable for configuration design analysis and optimization of flexible connecting pipes under high pressure conditions. Background technique [0002] Multi-layer thin-walled bellows are widely used in aerospace, thermal energy, chemical industry and other industries as flexible connectors. U-shaped, C-shaped, S-shaped and Ω-shaped bellows are more common. Relatively speaking, the structure of the three-section arc primitive tangential bellows is relatively complex, but its comprehensive performance such as high-pressure resistance, deformation compensation, fatigue life, and reliability has been greatly improved. The structure of the three-section arc primitive tangential bellows is relatively close to that of the S-shaped bellow...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the characteristic geometric configuration of bellows is not strictly defined mathematically, which will inevitably limit the redesign and application of this type of bellows in different application environments. In addition, the degree of influence of the bellows waveform parameters is not well understood. It is clear that it is easy to touch the red line of the parameter boundary during design, resulting in failure of configuration design

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