摘要
燃油车在定置工况下由于车身各板件振动引起的车内噪声对乘坐舒适性有较大影响,通过发动机、悬置等与车身的连接点传递至车身的振动是引起车身板件振动的主要原因。对某重卡车身悬置安装点动刚度及噪声传递函数进行了计算,发现其X向动刚度及噪声传递函数远低于企业标准;基于此明确了提高悬置安装点动刚度降低车内噪声的方法,通过对悬置支架结构优化改进,提升了悬置安装点动刚度。试验结果表明:改进方案能够降低车辆怠速及定置额定转速两种工况下的车内噪声,悬置安装点动刚度的优化有益于降低特定工况下的车内噪声。
The interior noise of fuel vehicle caused by the vibration of various body parts under fixed condition has great influence on ride comfort,the vibration transmitted to the vehicle body through the connection points with the vehicle body such as the engine and suspension is the main cause of body panel vibration.The dynamic stiffness and noise transfer function of a heavy truck cab suspension were calculated,and it was found that the dynamic stiffness and noise transfer function in X direction were far lower than the enterprise standard.Based on this,the method of improving the dynamic stiffness of mounting point to reduce vehicle interior noise was clarified.The structure of suspension bracket was optimized and the dynamic stiffness of the mounting point was improved.Experimental results show that the improved scheme can reduce the interior noise under two working conditions of vehicle idle speed and fixed rated speed,the optimization of mounting point dynamic stiffness is beneficial to improve the noise level under some specific working conditions.
作者
唐公明
陈德博
耿磊
吴思远
TANG Gongming;CHEN Debo;GENG Lei;WU Siyuan(Technology Center,Xuzhou XCMG Automobile Manufacturing Co.,Ltd.,Xuzhou Jiangsu 221000,China)
出处
《汽车零部件》
2023年第4期42-45,共4页
Automobile Parts
关键词
怠速
动刚度
传递函数
车内噪声
idle speed
dynamic stiffness
transfer function
vehicle interior noise
