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For evaluating vibration reliability of Li-ion battery packs used in heavy-duty mining vehicles, ANSYS, finite element software, was adopted to simulate Li-ion battery packs in a heavy-duty mining vehicle and calculate its stochastic vibration. Based on the test performed about random vibration of battery packs, it is found that the first modal frequency of the battery packs is 33.85 Hz, corresponding to the frequency of upper cover of battery packs, which is greater than the external excitation frequency transmitted by frame (30 Hz). thus low-order frequency resonance can be avoided and vibration reliability of the structure can be improved. The calculated stresses in the random vibration of key parts of battery packs, including stiffener, lower box, upper cover and battery brackets, are all lower than the yield strength of the corresponding materials, indicating the structural parts of battery packs meet the requirements for strength reliability. Permanent deformation and damage have not been found in the assembly of battery packs in the random vibration test, verifying the reliability of this simulative computation results.

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为了评价重载矿车用锂离子电池包的振动可靠性，采用有限元软件ANSYS对某重载矿车用锂离子电池包进行了模态仿真分析以及随机振动仿真计算，并对电池包进行了随机振动试验。结果表明，电池包结构第1阶模态频率为33.85 Hz（对应电池包结构的上盖），大于车架传递的外激励频率（30 Hz），可以避开低阶频率共振，提高结构振动可靠性；电池包箱体加强筋、下箱体、上盖和电池安装支架等关键零部件的随机振动计算应力均小于材料屈服强度，电池包结构件满足强度可靠性要求；电池包总成结构件在随机振动试验中均未出现永久变形、损伤等现象，验证了仿真计算结果的可靠性。

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张明军（1985—），男，湖南沅陵人，博士，副教授，主要从事机械工程和激光加工方面的研究。

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张明军（1985—），男，湖南沅陵人，博士，副教授，主要从事机械工程和激光加工方面的研究。

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