摘要
某型悬挂装置在进行5 h耐久振动后,外观检查时发现其连接框与本体连接处有4处长约15 mm的裂纹。对裂纹现象列出故障树,通过对连接框的结构、受力、振动量值响应等方面进行分析后发现,悬挂装置在不挂载状态下,振动量值过大是导致连接框裂纹产生的直接原因,连接框连接处的应力集中对裂纹的出现有促进作用。该分析结果已通过试验验证,并提出相应纠正措施。
After 5 h of endurance vibration testing, the joining frame of a suspension system was found to have 4 cracks with the length of about 15 mm at the joining section. Fault-tree method was used to analyze the failure cause. According to the fault tree, the structure, stress and vibration value of the suspension system were mainly analyzed. The results show that the cracks of the joining frame were mainly caused by excessive vibration value under the condition of unloading. In addition, the stress concentration at the joining section of the joining frame promoted the initiation and propagation of the cracks. The analysis results were validated by experiments, and corresponding correcting steps were put forward.
出处
《失效分析与预防》
2012年第3期188-191,205,共5页
Failure Analysis and Prevention
关键词
裂纹
结构强度
耐久振动
crack
structural strength
endurance vibration
