某气瓶结构振动断裂故障分析及改进措施

分析了某气瓶在振动试验中出现的耳片断裂故障,从结构动力学的角度揭示产品破坏的根本原因,给出改进思路,并结合实际产品提出多种修改模型,然后通过动力学仿真计算进行改进效果的对比,从而确定最佳的修改方案.最后,对改进后的气瓶结构进行随机振动试验,试验结果表明：振动过程中,气瓶改进结构在原结构破坏位置的动应力得到明显的降低,避免结构疲劳破坏,改进可行有效.

Analysis of vibration fracture failure of a gas vessel and improvement measures

The auricle fracture failure occurred in a gas vessel vibration experiment is analyzed in this paper. The hypostasis reason of the vessel structure failure was disclosed in the viewpoint of structure dynamics. An improvement idea is offered for the initial failure. Several modified models are proposed according to the idea and the actual products. The effects of different modified models were contrasted through structure dynamics simulation. Accordingly the optimal modified model was ascertained. The modified vessel structure was verified by random vibration test. The test result shows that the stress on the auricles of the modified vessel is obviously reduced in the process of the vibra- tion, and the improvement measure is effectual and feasible in avoiding the structure fatigue failure.