车载LNG气瓶在振动和冲击载荷作用下的失效研究及风险应对措施

Failure Research and Risk Counter-Measure of LNG Vehicle Cylinder Under Vibration and Impact Loading

车载LNG气瓶是为LNG汽车提供燃料贮存及自动连续稳定供给的主要设备,在实际使用过程中会随着LNG汽车的颠簸、加速、减速及转弯而发生振动,特别是在山区、矿场等路面环境比较差的路况下,汽车在经历急刹车、路面凹坑等极端状态时,由于瓶体自重以及内部贮存液体的急剧晃动而产生较大的振动和冲击载荷,影响气瓶的安全使用。因此,针对车载LNG气瓶在振动和冲击工况下的失效模式进行研究并提出相应的风险应对措施具有十分重要的意义。本文介绍车载LNG气瓶发展和结构,分析目前已有的对振动和冲击载荷作用下车载LNG气瓶失效研究存在的不足之处,以及车载LNG气瓶失效模式,针对失效模式提出风险应对措施。

The LNG vehicle cylinder is the main equipment for fuel storage and automatic continuous and stable supply of LNG vehicles.In actual use,it will vibrate with the bumping,acceleration,deceleration and turning of LNG vehicles,especially in mountainous areas and mines.In the road conditions where the road surface environment is relatively poor,when the vehicle experiences extreme conditions such as sudden braking and road surface pits,the vibration and impact load are generated due to the self-weight of the bottle body and the sharp shaking of the internal storage liquid,which affects the safety using of the gas cylinder.Therefore,it is of great significance to study the failure modes of LNG cylinders under vibration and shock conditions and propose corresponding risk response measures.This paper introduces the development and structure of LNG cylinders,analyzes the existing deficiencies in the research of LNG cylinder failure under vibration and shock loads,the failure mode of vehicle LNG cylinders,and proposes risk countermeasures for failure modes.