为突破汽车NVH仿真中NTF仿真精度难题,设计制作了"刚性壁乘员舱",把"声腔模态"与"容器"的耦合效应降到可以忽略.基于此刚性壁乘员舱,分析了子声腔对整体声腔模态的影响,讨论了多孔材料的建模方法,建立了座椅和地毯等多孔材料模型,量化分析了前围隔声材料对钣金振动与声腔模态耦合的影响.仿真和试验对标的结果表明,空腔模态、空气传递声传递函数、结构传递振动传递函数和声传递函数均获得较好的仿真精度,为整车低频路噪和发动机噪声控制提供了参考.
To overcome the challenges of NTF simulation accuracy in vehicle NVH simulations,the paper designed and constructed a"rigid-wall occupant cabin",which reduced the coupling effect between the"acoustic cavity mode"and the"container"to a negligible extent.Based on the rigid-wall passenger cabin,the influence of sub-acoustic cavities on the overall acoustic cavity mode was analyzed,and the modeling method for porous materials was discussed.The porous material models such as seats and carpets were established,and the effect of front wall sound insulation material on the coupling of sheet metal vibration and acoustic cavity mode was analyzed quantitatively.The simulation and test results show that the cavity mode,air-borne sound transfer function,structural vibration transfer function and sound transfer function all achieve good simulation accuracy.The findings of this paper provide a reference for the control of low frequency road noise and engine noise.
张荣荣;Charles ZHANG;洪卫芳;李永超
比亚迪汽车工业有限公司,广东,深圳 518000
声腔模态;多孔吸声材料;空气传递噪声;结构传递噪声;有限元建模;试验仿真对标
cavity mode;porous material;air born noise;structure born noise;finite element modeling;orrelation between test and simulation
《汽车工程学报》 2024 (001)
144-153 / 10
10.3969/j.issn.2095‒1469.2024.01.15
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