摘要
空投车辆着陆过程的冲击应力分布状态影响空投车辆油箱的服役可靠性。针对空投车辆跌落过程油箱结构的冲击应力规律研究,建立了充油75%的油箱有限元模型,采用CEL方法对油箱进行流固耦合计算,结合实车空投试验,分析了油箱本体动态应力分布以及液体状态。结果表明:跌落冲击过程,油箱壳体与内部隔板翻边搭接位置处应力最大;油箱底部橡胶缓冲垫是降低油箱结构动态应力的有效形式,缓冲垫接触面积达到原来的四倍,油箱结构动态应力下降10 MPa。研究结果对空投车辆油箱服役可靠性提升有重要的理论指导,也可为空降车空投结构设计与校核提供理论依据。
The impact stress distribution state during the landing process of airdrop vehicles restricts the service reliability of lightweight fuel tank of airdrop vehicles.In order to study the impact stress of the fuel tank structure during dropping process of airdrop vehicle,the finite element model is established.Fluid-solid coupling analysis of the fuel tank is carried out using CEL methods.Combined with the real vehicle drop test by giving the tank 3m/s of the initial drop impact velocity,the dynamic stress distribution and liquid state of the tank body are obtained by simulation.The results show that the maximum stress is at the overlapping position of the fuel tank shell and the inner diaphragm flange.Using rubber cushion at the bottom of oil tank can reduce the dynamic stress of oil tank structure effectively.When the contact area of the cushion is 4 times of the original,the dynamic stress of the oil tank structure decreases by 10 MPa.The results can provide a basis for lightweight design and verification of airdrop structure and important theoretical guidance for lightweight design of airdrop vehicle fuel tank.
作者
刘振光
何兴云
王永勤
LIU Zhenguang;HE Xingyun;WANG Yongqin(Jianglu Electromechanical Group Co.,Ltd.,Xiangtan 411100,China)
出处
《机械》
2023年第3期8-13,20,共7页
Machinery
基金
军委科技委项目(18-H863-03-2T-003-009-02)。
