摘要
针对火箭发动机推进系统管路中广泛使用的球面密封结构,选取四节点四边形板单元PLANE182作为基准单元对管路连接件进行有限元计算,得出管路连接件的应力场、应变场以及位移场的函数表达式,分析了其密封机理,讨论了弹塑性变形对金属密封的重要作用。在此基础上,采用非线性有限元法对接触单元进行了弹塑性分析和接触分析,并对管路连接件进行了耦合接触分析,在ANSYS平台上对耦合接触体进行了力学性能测试,详细分析了管路连接件的位移、应变和应力分布状况。
Four-node quadrilateral plate element PLANE182 is taken as a reference element to conduct the finite element calculation for spherical sealing structure widely used in rocket engine propulsion system pipeline.The function expressions of stress field,strain field and displacement field of tube connector were obtained.The sealing mechanism of tube connector is analyzed.The importance of elastic-plastic deformation to metal sealing is discussed.Based on the above research,the elasto -plastic and contact analyses for the contact element and coupled contact analysis for the tube connector are conducted by means of non-linear finite element method.The mechanical property testing of coupled contact bodies was carried on ANSYS platform to determine the displacement,strain and stress distribution of the tube connector.
出处
《火箭推进》
CAS
2010年第6期36-41,共6页
Journal of Rocket Propulsion
基金
国家航天技术支撑项目
