摘要
针对氢能燃料电池汽车高压氢气瓶阀长期受外部激励作用易在结构薄弱部位发生强度破坏甚至疲劳失效的问题,运用有限元仿真方法对汽车在道路行驶时受外部激励载荷下70 MPa氢气瓶阀的结构强度及疲劳强度进行了分析计算。结果表明,基于该方法,自主设计的高压氢气瓶阀在2种典型路况下的结构强度均满足要求,在4种不同路况随机振动功率谱密度(Power Spectral Density,PSD)激励下的疲劳强度均满足要求,结构薄弱处为瓶阀阀体螺纹连接部位,靠近介质压力作用面的螺纹承载占比最高,应力最大。
For the problem that the high-pressure hydrogen cylinder valve of hydrogen fuel cell vehicle is prone to strength damage or even fatigue failure at the weak part of the structure under external excitation load for a long time,the structural strength and fatigue strength of 70 MPa hydrogen cylinder valve of the vehicle under external excitation load when driving on the road were analyzed and calculated by finite element simulation method.The results show that,based on this method,the structural strength of the self-designed high-pressure hydrogen cylinder valve meets the requirements in 2 typical road conditions,and the fatigue strength under the excitation of random vibration Power Spectral Density(PSD)in 4 different road conditions meets the requirements.The weak part of the structure is the threaded connection part of the cylinder valve body,and the bearing ratio of thread close to the medium pressure action surface is the highest,and the stress value is the largest.
作者
李树勋
王宜雪
杨玲霞
康雯宇
Li Shuxun;Wang Yixue;Yang Lingxia;Kang Wenyu(College of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050;Machinery Industry Pump and Special Valve Engineering Research Center,Lanzhou 730050)
出处
《汽车技术》
CSCD
北大核心
2022年第9期30-35,共6页
Automobile Technology
关键词
高压氢气瓶阀
外部激励
结构强度
疲劳强度
可靠性
High-pressure hydrogen cylinder valve
External excitation
Structural strength
Fatigue strength
Reliability
