Method for equivalence hinged corrugated pipe by coupled variable cross-section beam

Abstract

The invention relates to a design method for the equivalence a hinged corrugated pipe by coupled variable cross-section beams in order to simplify the finite element analysis work for the complicated The invention relates to a design method for the equivalence a hinged corrugated pipe by coupled variable cross-section beams in order to simplify the finite element analysis work for the complicatedpipeline system design of the hinged corrugated pipe. Firstly, deducing the relation between force and displacement when transversal force is exerted on the free end of either variable cross-section bpipeline system design of the hinged corrugated pipe. Firstly, deducing the relation between force and displacement when transversal force is exerted on the free end of either variable cross-section beam of which any interface is rectangular based on the assumption that a cantilever beam has small deflection, and considering the elasticity and the elastic plastic deformation of either variable croeam of which any interface is rectangular based on the assumption that a cantilever beam has small deflection, and considering the elasticity and the elastic plastic deformation of either variable cross-section beam; secondly, proposing a method of simplifying a hinged corrugated pipe model and a method of utilizing finite element calculation to obtain the rigidity data of the fixed part of the siss-section beam; secondly, proposing a method of simplifying a hinged corrugated pipe model and a method of utilizing finite element calculation to obtain the rigidity data of the fixed part of the simplified hinged corrugated pipe in two directions; thirdly, proposing a method of utilizing a mixing genetic algorithm to optimize parameters of the variable cross-section beams and proposing a speciamplified hinged corrugated pipe in two directions; thirdly, proposing a method of utilizing a mixing genetic algorithm to optimize parameters of the variable cross-section beams and proposing a special gradual shrinkage method aiming at the mixing genetic algorithm so as to further obtain geometric parameters and material parameters of the two variable cross-section beams; and finally, coupling thl gradual shrinkage method aiming at the mixing genetic algorithm so as to further obtain geometric parameters and material parameters of the two variable cross-section beams; and finally, coupling the two variable cross-section beams at the free ends by constraint equations and connecting the roots of the variable cross-section beams with flanges by establishing auxiliary discs.e two variable cross-section beams at the free ends by constraint equations and connecting the roots of the variable cross-section beams with flanges by establishing auxiliary discs.

Description

technical field [0001] The invention relates to a design method for using coupled variable-section beams to replace hinge bellows in finite element analysis of pipeline systems. The finite element analysis work of complex piping system with hinged bellows can be simplified by using the equivalent variable cross-section beam. Background technique [0002] In large-span complex pipeline systems, hinged bellows are usually used to absorb the angular displacement at the pipeline joints, but it is also unavoidable to withstand certain lateral displacements. The structure of the hinge bellows is relatively complex, including flanges at both ends, corrugations, rings, single lugs, double lugs, rivets, gaskets, joints and other parts. There are 10 contacts in the hinge bellows structure, such as rings Between the rivet and the lug, between the rivet and the lug, etc., if the hinge bellows are not simplified or equivalent when the finite element method is used to analyze the respons...

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a design method in which the real hinged bellows is equivalent to two coupled variable-section beams, which well solves the problem that the finite element calculation and debugging of the hinged bellows pipeline system is difficult

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