基于有限元仿真的新能源汽车电池包模态分析与结构优化设计

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中图分类号：U469.72 文献标志码：B DOI：10.19710/J.cnki.1003-8817.20250125

Abstract：Thisarticleis basedon finiteelementsimulation technology toconduct modal analysisand structural optimization of anew energy baterypack box，inorder to solve theresonance problem caused byroad excitation duringdriving.Firstly，afinite element model of thebatterypack was establishedusing Hypermesh，andloworder modal frequenciesandmodes wereobtained through modalanalysis.Itwas found thattheoriginal first-ordermodal frequency was 22.34Hz ，which easily overlapped with the external excitation frequency.Propose an optimization plan for improving thestructure of theupper box and strengthening the arrangement of reinforcement bars toaddress this issue.The optimized first-order modal frequency has significantly increased to 43.00Hz ，effectivelyavoidingthe frequencyrangeof external excitation.Staticanalysisverifiedtherationalityof theoptimizationplan.Research has shown that this structuraloptimizationdesign cansignificantly increase the low order modal frequency of battry packs， reduce resonance risk，and provide theoretical support for the design of new energy vehicle batery packs.

KeyWords：atteryack，odalanlysis，Staticnalysis，initeelementmethod，tructuraloition

1前言

电池包作为新能源汽车的核心动力部件，其设计结构的合理性直接关系到车辆的稳定性和安全性。（剩余4093字）