摘要
根据某驾驶室的结构有限元模型,建立了该轻卡室内声腔边界元分析模型。基于模态分析理论,获得了驾驶室白车身前十阶模态频率和振型,并多次与模态试验结果进行对比,修正并确定后续分析采用的模型。以Hypermesh结构频率响应分析结果作为室内声场分析的边界条件,利用Virtual.Lab软件计算出驾驶员和乘客耳部的声压级、车身板件振动声学贡献量。基于此提出了降低该车车内噪声的车身改进意见,而这一结论可用来改进车身系统的声学设计。
According to a finite element model of the cab structure, the cavity is established. Based on modal analysis theory, the first lO order natural frequencies and mode shapes are obtained, to modify and determine the cab model for subsequent analysis by comparing with the modal test. Taking structure frequency response analysis results as boundary condition of interior sound field which is got from Hypermesh, sound pressure level of the driver and passenger＇s ear and panel contribution are obtained from Virtual.Lab. Based on all of these, suggestions are proposed to reduce interior noise, which can be used to improve the acoustic design of the body system.
出处
《农业装备与车辆工程》
2013年第5期6-10,共5页
Agricultural Equipment & Vehicle Engineering
基金
国家自然科学基金(50975071)
间隙主导型汽车摆振发生机理及动力学性态研究
