预应力钢丝缠绕厚壁缸筒三维模型和平面应力模型分析

本文给出预应力钢丝缠绕有限元分析的三维模型和轴截面平面应力模型两种模拟方法。以80MPa内压的50MN预应力钢丝缠绕液压缸为算例进行有限元模拟,将钢丝层简化为六层圆筒,分别施加预应力和边界条件,两种模型均能得到相同的计算结果。但轴截面平面应力模型计算效率更高,结果更容易收敛。在求解方法处理上,将各钢丝层预应力按一个载荷步施加;将每层钢丝载荷工况定义为一个载荷步文件,后一载荷步文件删除前一载荷步载荷,采用载荷步文件法求解,按工况组合的方法将这些载荷步计算的结果叠加在一起;以及采用多载荷步方法计算。三种方法得到了相同的结果。

Analysis of 3D model and plane stress model for pre-stressed steel wire wound thick wall cylinder barrel

Two simulation methods including3D model andaxial section plane stress model have been conducted to finite analysis of pre-stressed steel wire wound cylinder.Taking the 50MN pre-stressed steel wire wound hydraulic cylinder with 80MPa inner pressure as an example,the finite element simulation has been completed.The steel wire layer has been simplified into six layers cylinder and has been executed prestressed force and boundary conditions respectively.The two models can get the same calculation result.But the axial section plane stress model is more efficient and easier to convergence.The solving method has been dealt with in the following steps.The pre-stress of each steel wire layer has been exerted as one load step.Each layer steel wire working load condition has been defined as one load step file,while the later load step file would delete the former file.By adoption of load step file method,the calculation results of these load steps have been overlapped as per combination of working conditions.The multi-load step method has been also applied.The three methods have got the same results.