增强S型波纹管结构耐压强度分析技术  

Compression strength analysis of the reinforced S-shaped bellows

作　　者：徐学军 任武 袁喆 徐含乐[2] 朱卫平[3] XU Xuejun;REN Wu;YUAN Zhe;XU Hanle;ZHU Weiping(Science and Technology on Liquid Rocket Engine Laboratory, Xi'an 710100, China;Northwestern Polytechnical University, Xi'an 710129, China;Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China)

机构地区：[1]液体火箭发动机技术重点实验室,陕西西安710100 [2]西北工业大学,陕西西安710129 [3]上海大学上海市应用数学和力学研究所,上海200072

出　　处：《火箭推进》2019年第1期19-24,共6页Journal of Rocket Propulsion

基　　金：国防科技重点实验室基金(6142704040217047)

摘　　要：针对某型液体火箭发动机燃料摇摆装置中的增强S型波纹管,采用理论解析和数值仿真技术进行耐压强度分析研究。研究表明:增强S型波纹管耐压强度数值仿真有限元模型必须采用分层波纹管结构型式,简化成单层波纹管模型仿真计算结果误差较大;合理选用波纹管有限元模型的网格密度,不仅可有效保证耐压强度计算结果精度,还可减少计算机仿真计算时间;波纹管的材料、总厚度、波形等参数不变的条件下,适当增加波纹管层数,可提高波纹管的径向刚度,减少波纹管的轴向刚度。For the reinforced S-shaped bellows in the fuel swing device of a liquid rocket engine, the theoretical analysis and numerical simulation are used to study its compression strength.The research shows that the finite element model of the reinforced S-shaped bellows for the pressure resistance analysis must be defined as a layered model, becase the simplified single layer model may lead to larger errors .Reasonable selection of the mesh density of the finite element model can not only effectively ensure the accuracy of the compression strength,but also reduce the computing time.Under the condition that the material, total thickness, wave shape and other parameters of the bellows are constant, appropriately increasing the number of bellows layers can increase the radial stiffness and reduce the axial stiffness.

关 键 词：增强S型波纹管 耐压强度 网格密度 

分 类 号：V475[航空宇航科学与技术—飞行器设计]