损伤识别在车用储氢容器模态试验中的应用  

Experiment Modal Analysis and Damage Detection for Automobile Hydrogen On-Board Storage Tank

作　　者：孙晓燕[1] 郑津洋[2] Dryver R.Huston 秦权[4] 王海龙[1] 

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]浙江大学材料化学学院,杭州310027 [3]佛蒙特大学工程学院,佛蒙特州美国vt05405 [4]清华大学土木水利学院,北京100084

出　　处：《振动．测试与诊断》2014年第3期479-484,590,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：美国运输部基金资助项目(DTOS59-06-G-00048);国家高技术研究发展计划("八六三"计划)资助项目(2007AA04Z437);国家自然科学基金资助项目(50808158);浙江省重点科技创新团队资助项目(2010R50034);浙江省自然科学基金资助项目(Y107049);高等学校博士学科点专项科研基金资助项目(200803351117)

摘　　要：针对车用高压储氢容器的复合纤维缠绕结构在其使用过程中的安全问题,开展了体积为0.074m3车用纤维缠绕储氢容器的模态试验研究。根据完好容器、反复充装引起的桶身轻微损伤和疲劳破裂两种疲劳损伤状态容器的模态分析,探讨了基于模态参数进行损伤识别的可行性。研究表明,无论是轻微损伤还是疲劳破裂状态,局部的疲劳裂纹对损伤前后的频响函数有一定影响但并不敏感,无法基于频率响应函数判定损伤是否发生并确定损伤位置,但基于损伤前后振型比较可以实现损伤判定并预测损伤位置。该研究为确定车用储氢结构的在线损伤识别奠定了实践基础。In order to investigate the safety issues of a fiber composite wrapped tank for automobile hydrogen on-board storage during the operation process,the modal tests of 0.074m3 fiber composite wrapped tanks are carried out.Using the dynamic parameters of the intact,slightly damaged,and fatigue-cracked tanks caused by repeated hydrogen filling,the feasibility of damage detection of fatigue cracks in fiber composite wrapped tanks is analyzed.The test results indicate that the localized fatigue cracks have some effects on the frequency responses of slightly damaged and fatigue-cracked tanks,but the effects are not significant.Therefore,the frequency response function cannot be used to detect the extent of damage or the crack location in a fiber composite wrapped tank.However,a method based on modal shape is a potential way to detect and locate possible damage.These test results and analyses provide guidance on the online damage detection of high-pressure hydrogen storage tanks in automobiles.

关 键 词：纤维缠绕结构 储氢容器 在线损伤识别 模态试验 疲劳裂纹 

分 类 号：U473.25[机械工程—车辆工程]