摘要
某型号发动机热试车考核中高压金属软管多次出现破坏。通过建立软管有限元模型,采用非线性有限元分析了软管应力分布和各部分承载特点,判断波峰处轴向应力是影响软管结构强度的主要因素,有限元计算结果和试验破坏部位一致,表明有限元模型的合理性。在此基础上,通过参数化建模、设计中心复合实验和进行参数敏感度分析,得出影响波峰处最大轴向应力的敏感参数,为结构参数优化提供了依据。
Leakage happened to the high-pressure metal hose for several times in the hot test of a certain rocket engine. The stress distribution and bearing characteristics of the hose were analyzed with nonlinear FEM after the finite element model of the hose was established. It is found that the axi- al stress at the crown is the main factor affecting the strength of the hose. The results of the finite ele- ment calculation were consistent with the leakage position in the test, which shows that the finite ele- ment model is right. On this basis, through the parameterized modeling, the central composite experi- ment was designed, the parameter sensitivity analysis was performed, and the sensitive parameters af- fecting the maximal axial stress at the crown was acquired. The achievement can be used for opti- mization of structural parameters.
出处
《火箭推进》
CAS
2013年第5期60-64,共5页
Journal of Rocket Propulsion
基金
中国航天科技集团公司支撑项目(2009JY03)
关键词
高压金属软管
波纹管
应力分布
敏感度分析
high-pressure metal hose
bellows
stress distribution
sensitivity analysis
作者简介
闫松（1988-）,男,硕士研究生,研究领域为液氧煤油发动机动力学
