复杂载荷下液氢瓶支撑结构动态响应与可靠性研究  

Study on dynamic response and reliability of liquid hydrogen cylinder support structure undercomplexload

作　　者：史丁奇 赵耀中[2] 路兰卿 李亚鹏[2] 咸立伟 周运来 王慧君 Shi Dingqi;Zhao Yaozhong;Lu Lanqing;Li Yapeng;Xian Liwei;Zhou Yunlai;Wang Huijun(School of Aerospace and Aeronautics,Xian Jiaotong University,Xian 710049,China;Beijing Institute of Aerospace Testing Technology,Beijing 100074,China)

机构地区：[1]西安交通大学航天航空学院,西安710049 [2]北京航天试验技术研究所,北京100074

出　　处：《低温与超导》2024年第8期62-69,共8页Cryogenics and Superconductivity

基　　金：中国航天科技集团创新基金项目(CBZ04N23-05)资助。

摘　　要：本文通过有限元法,对比研究刚性与柔性支撑结构对车载1500 L液氢气瓶在不同工况下的动态响应和可靠性。通过模态分析和随机振动分析评估不同支撑形式下气瓶的固有频率特性、共振情况和振动形态。同时,模拟六种复杂工况下的冲击载荷,分析气瓶的应力和变形响应。结果显示,在模态分析中,刚性支撑气瓶的固有频率普遍高于柔性支撑气瓶,且在相同工况下变形更小。在随机振动分析中,刚性支撑在Y方向的应力响应低于柔性支撑,但速度和加速度响应较高,说明在高频振动环境下柔性支撑表现更佳。刚性支撑适用于低频或静态载荷主导的情况,而柔性支撑更适合高频振动环境。In this paper,the finite element method was used to compare the dynamic response and reliability of rigid and flexible support structures for vehicle-mounted 1500 L liquid hydrogen cylinders under different working conditions.The natural frequency characteristics,resonance and vibration morphology of the cylinder under different support forms were evaluated by modal analysis and random vibration analysis.At the same time,the impact load under six complex working conditions is simulated,and the stress and deformation response of the cylinder are analyzed.The results show that in the modal analysis,the natural frequency of the rigid support cylinder is generally higher than that of the flexible support cylinder,and the deformation is smaller under the same working condition.In the random vibration analysis,the stress response of the rigid support in the Y direction is lower than that of the flexible support,but the velocity and acceleration responses are higher,indicating that the flexible support performs better in the high-frequency vibration environment.Rigid support is suitable for low frequency or static load,while flexible support is more suitable for high frequency vibration environment.

关 键 词：液氢瓶 刚性支撑 柔性支撑 车载 可靠性分析 

分 类 号：TK91[动力工程及工程热物理]