摘要
在氢燃料电池系统冲击振动试验中,振动工装设计是否合理决定了振动试验是否平顺,系统结构是否安全。设计合理的依据在于工装在试验中不能发生共振,即工装固有频率大于振动频率。然而大功率氢燃料系统振动工装的固有频率很难满足这一要求,因为体积大、尺寸大,导致振动工装本身刚度和固有频率较低,极易发生共振,从而影响着试验。因此为了使得振动工装符合振动要求,通过有限元仿真方法,不断迭代优化,使得整体固有频率和质量到达较好的水平,保证振动工装尽可能不发生共振。通过正弦试验验证,该振动工装固有频率大于振动频率,表明该工装满足振动试验要求,在振动频率内不会发生共振,该方法对大功率氢燃料电池系统振动工装设计具有一定指导意义。
In the impact vibration test of hydrogen fuel cell systems,the rationality of the vibration fixture design determines whether the vibration test is smooth and whether the system structure is safe.The reasonable basis for design lies in the fact that the fixture cannot resonate during the test,that is,the natural frequency of the fixture is greater than the vibration frequency.However,the natural frequency of the highpower hydrogen fuel system vibration fixture is difficult to meet this requirement because of its large volume and size,which results in low stiffness and natural frequency of the vibration fixture itself,making it prone to resonance and affecting the experiment.Therefore,in order to make the vibration fixture meet the vibration requirements,finite element simulation method is used to continuously iterate and optimize,so that the overall natural frequency and mass reach a good level,ensuring that the vibration fixture does not resonate as much as possible.Through sine wave testing,it is verified that the natural frequency of the vibration fixture is greater than the vibration frequency,indicating that the fixture meets the requirements of the vibration test and will not resonate within the vibration frequency.This method has certain guiding significance for the design of vibration fixtures for high-power hydrogen fuel cell systems.
作者
黄希宇
赵庆尧
邹利民
李强
刘志祥
Huang Xiyu;Zhao Qingyao;Zou Limin;Li Qiang;Liu Zhixiang(Sino-Synergy Hydrogen Energy Technology(Jiaxing)Co.,Ltd.,Foshan,Guangdong 528000,China)
出处
《机电工程技术》
2024年第12期213-216,共4页
Mechanical & Electrical Engineering Technology
关键词
大功率
燃料电池
振动工装
仿真计算
试验验证
high power
hydrogen fuel cell system
vibrating tool
simulation calculation
test verification
作者简介
第一作者:黄希宇(1997-),硕士,工程师,研究领域为燃料电池系统结构仿真、产品可靠性与振动试验、系统流体仿真。
