波纹管有限元建模方法

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中图分类号：TH703.2；TB115.1 文献标志码：B

Finite element modeling methods for bellows

HUANG Hanlin1，23， ZHOU Shiming1，2，LI Daokui ， XU Liang （1.College of Aerospace Scienceand Engineer，National Universityof Defense Technology，Changsha 410oo，China； 2.Hunan Key Laboratory of Inteligent Planning and Simulation for Aerospace Missons，Changsha 4100，China； 3.No.77680 Troops of PLA，Shannan ，Xizang，China）

Abstract：In order to verify the applicability of diffrent modeling methods for the finite element analysis of the bellows’structure mechanical characteristics，the bellows’theoretical values of axial stifess， bending stiffness and bending stress caused by axial force are obtained according to EJMA method，and 2D axisymmetric model，3D shell model and 3D solid model of bellws are established based on finite element method to solve the axial stiffness，bending stiffness and maximum stress of bellows. By comparing the relationship between the theoretical values and the finite elementvalues of the three models’axial stiffness，bending stifess and maximum stress，it shows that the three models are all suitable for the finite element analysis of the belows’structure mechanical characteristics，and the applicable scope of the three finite element models is given，which can provide a reference for the design and analysis of bellows.

Key Words： belows；finite element analysis；modeling method； EJMA；axisymmetric model； shellmodel；solid model

0引言

波纹管是用于补偿管路因温差或温度波动造成的轴向、横向和角位移的元件，其主要性能指标轴向刚度、弯曲刚度等是衡量波纹管补偿能力的主要依据。（剩余5030字）