Research On Computing Method Of Conveying Pipe’s Displacement And Stiffness

The conveying pipe is usually made of metal bellows,tube and flange threeparts welded together,being used to convey propellant from rocket tank toengine,through one or more corrugated pipe to achieve displacement compensationfunction,is important poduct of launch vehicle.Sylphon bellows plays a main role to the displacement compensation ofconveying pipe, the accurate calculation of bellows stiffness is the key to calculatingthe conveying pipe displacement.This paper will research the”U”type bellows,computing bellows stiffness by project approximate method and finite elementanalysis,analysing the calculation results, the correctness of the finite elementmethod, and lays the foundation for the conveying pipe displacement and stiffnesscalculation.In view of the convey pipe’s finite element normal analysis method have thetrouble with complex model and long running time, so summarize the convey pipe’sfinite element quick analysis method on condition that is aware of bellows stiffness,compute the convey pipe’s displacement and stiffness. By analysing computingresult of the convey pipe’s finite element normal analysis method and finite elementquick analysis method, illustrating that the finite element quick analysis method isright and accurate.Illustrating the engineering application of the convey pipe’s finite elementquick analysis method, applicating the analysis of the finite element quick analysismethod in the bolt strength checking and engine design input.The intention of this lmper is to provide some helps for the engineers analyzingthe convey pipe’s plane displacement, and guide the engineers to analyse the conveypipe’s finite element quick analysis method.