摘要
准确的驾驶室惯性参数,包括质量、质心位置、转动惯量和惯性积等,是整车动力学分析的基本参数。以某国产重卡整备驾驶室为研究对象,利用LMS数据采集系统测量频率响应函数,采用称重法获得重卡驾驶室的平面质心位置。从频率响应函数中提取质量线计算质心位置,与称重法结果进行对比,X方向误差为1.99 cm,Y方向误差为0.68cm。该结果表明质量线法具有较高的测量精度。计算整备驾驶室的转动惯量、惯性积、主惯性矩和惯性主轴方向,并对引起试验误差的原因进行分析。
Accurate inertia parameters of a heavy truck cab,including the mass,the position of mass center,the moment of inertia and the product of inertia,and so on are basic parameters for whole vehicle dynamic analysis.A domestic heavy truck cab was focused.The frequency response functions（FRFs） were obtained by LMS data acquisition system.The center of mass in the XY plane of the cab was obtained by the weighing method.On the other hand,the center of mass of the cab was calculated based on the mass line,extracted from the FRFs.Both results were compared and show that the error in X direction was 1.99cm and the error in Y direction is 0.68cm.It is concluded that the mass line method is of good measurement precision.Then the moment of inertia,the product of inertia,the principal moment of inertia and the principal axis direction were calculated successively.The reasons of errors were analyzed and discussed.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第16期193-197,共5页
Journal of Vibration and Shock
基金
国家重点基础研究发展计划(973计划)(2011CB711203)
关键词
重卡驾驶室
质量线法
惯性参数
频响函数
heavy truck cab
mass line method
moment of inertia
frequency response functions
