摘要
针对广泛应用于航天管路系统中的金属软管静力学特性,使用试验方法和有限元仿真方法对其进行研究。对软管进行了无内压和内压0.5 MPa状态下的轴向拉压刚度试验、横向弯曲刚度试验,试验结果表明,金属软管轴向拉压刚度、横向弯曲刚度具有非线性特性,且其力学特性与内压状态有关。根据软管中网套的非线性轴向力-位移关系,在有限元仿真软件中建立了一种基于非线性弹簧系统的等效模型。数值结果表明,该模型中的分配系数Ca取0.95时,仿真结果与试验结果一致性较好。该模型能够有效复现金属软管静力学变形的非线性特性,为进一步静动力学分析提供参考。
Metal hoses are widely used in aerospace pipeline systems.In response to the current limited understanding of the static characteristics of metal hoses,experimental method and finite element simulations were used to study the metal hoses.Axial tension-compression stiffness tests and transverse bending stiffness tests were carried out on metal hoses without internal pressure and with 0.5 MPa internal pressure.The test results show that the axial tension-compression stiffness and lateral bending stiffness of the metal hose have nonlinear characteristics,and their mechanical properties are related to the internal pressure state.Based on the nonlinear axial force-displacement relationship of the metal braid in the hose,an equivalent model based on a nonlinear spring system was established in finite element simulation software.The numerical results show that the simulation results are in good agreement with the experimental results when the distribution coefficient Ca is 0.95 in the model.The model can effectively reproduce the nonlinear characteristics of the static deformation of the metal hose and provide reference for further static dynamic analysis.
作者
王亚军
陈鼎铭
贺启林
方红荣
周浩洋
WANG Yajun;CHEN Dingming;HE Qilin;FANG Hongrong;ZHOU Haoyang(China Aerospace Electronics Technology Research Institute,Beijing 100094,China;Beijing Key Laboratory of Deep Cryogenic Technology Research,Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China)
出处
《压力容器》
北大核心
2024年第2期17-27,共11页
Pressure Vessel Technology
基金
民用航天预先研究项目(D030102)。
