摘要
为避免汽车行驶过程中由于氢气瓶碰撞等原因造成氢气瓶支架疲劳断裂的问题,本文以某款经燃油汽车改装后的燃料电池大客车为研究对象,对其氢气瓶支架进行有限元分析。运用ANSYS Workbench创建有限元模型,并在垂向颠簸、前进制动、左右转弯3种典型工况下进行仿真,进行静强度分析,校核支架的强度要求,并识别出潜在失效区域。仿真结果表明,在强度分析中,在前进制动工况下的A区域产生最大应力为62.9 MPa,满足要求;在模态分析中,第1阶模态值为17Hz,在汽车的激振频率范围内,容易发生共振,故刚度有待提高。该研究对燃料电池大客车的改装具有一定的意义。
In order to avoid the problem of fatigue fracture of the hydrogen cylinder stent due to the collision of the hydrogen cylinder during the course of the car driving, the finite element analysis of the hydrogen battery holder of the modified fuel cell bus was carried out. The finite element model was created by ANSYS Work-bench. Simulation was carried out for three typical working conditions of vertical jolting, forward braking and left and right turning. Static strength analysis was carried out to check the strength requirement of the bracket and identify the potential failure area. The simulation results show that the maximum stress occurs in the A re-gion of the forward braking condition in the strength analysis, and the value is 62. 9 MPa, which satisfies the requirement. In the modal analysis of the first order mode value of 17 Hz, it is in the car＇s excitation frequency range, and prone to resonance, and so the stiffness need to be improved.
出处
《青岛大学学报（工程技术版）》
CAS
2017年第4期76-80,共5页
Journal of Qingdao University(Engineering & Technology Edition)
基金
国家科技重大专项资助项目(2015ZX04005001)
