一体化包覆药柱缠绕应力的数值计算  

Numerical calculation of winding stress of an integrated coated propellant grain

作　　者：潘浩东 王瑞[1] 舒慧明[2] 尹艳华[1] PAN Haodong;WANG Rui;SHU Huiming;YIN Yanhua(Beijing institute of technology,Beijing100081,China;Xi'an Modern Chemistry Research Institute,Xi'an710065,China)

机构地区：[1]北京理工大学,北京100081 [2]西安近代化学研究所,西安710065

出　　处：《固体火箭技术》2021年第4期498-505,共8页Journal of Solid Rocket Technology

摘　　要：固体火箭推进剂应用广泛,基于一体化包覆纤维缠绕工艺,对药柱缠绕过程进行数值模拟应力计算。利用ABAQUS建立有限元模型进行数值计算,对药柱各节点应力进行分析。基于实际工况列出预紧力、药柱位移速度、药柱旋转速度、纤维带宽四个工艺参数,对缠绕过程进行动态仿真模拟,同时通过静态模拟多层缠绕工况。计算结果表明,单圈缠绕结束后药柱主体应力在0.060~0.120 MPa内,最大应力为0.202 MPa;预紧力和纤维带宽对于缠绕应力的影响较大,预紧力越大,应力越大,而纤维带宽越宽,应力越小,药柱移速和转速对缠绕应力影响较小;多层缠绕时药柱应力大小会随着缠绕层数的增加而上升,上升速度越来越慢,16层时最大应力可达0.338 MPa,研究结果及数据对于带药纤维缠绕工艺具有支撑借鉴意义。Solid rocket propellant is widely used.Based on the integrated wrapping fiber winding process,the numerical simula⁃tion stress calculation of the winding process of the propellant grain was carried out.The finite element model of ABAQUS was estab⁃lished for numerical calculation,and the stress of each node of the grain was analyzed.Based on the actual working conditions,four process parameters,including pretightening force,displacement velocity,rotation velocity and fiber bandwidth,were listed.The dy⁃namic simulation of the winding process was carried out.Meanwhile,the multi⁃layer winding condition was simulated statically.The calculation results show that the main stress of the grain is within 0.060~0.120 MPa and the maximum stress is 0.202 MPa after winding.The larger the preloading force,the greater the stress,while the wider the fiber bandwidth,the smaller the winding stress.The velocity and rotational speed of the grain has little effect on the winding stress.In the multi⁃layer winding process,the stress of the grain increase with the increase of the number of winding layers,corresponding to a slower rising speed.The maximum stress of 0.338 MPa is obtained at 16 layers.The research results can be used as a reference for the filament⁃wound process with solid propellant.

关 键 词：推进剂药柱 带药纤维缠绕 一体化包覆工艺 应力 

分 类 号：V435.21[航空宇航科学与技术—航空宇航推进理论与工程]