摘要
应用有限元对某SUV轿车车架进行模态分析,在此基础上,基于多体动力学理论应用ADAMS/Car软件建立考虑车架柔性的刚柔耦合整车多体动力学模型。对车身质心垂向加速度、悬架动行程和轮胎动位移进行分析,并与多刚体模型的仿真结果进行比较。研究结果表明:考虑车架柔性的刚柔耦合模型的车身垂直加速度功率谱密度比刚体模型降低14.7%,悬架动行程增大27.1%,轮胎动行程减小14.8%;车架柔性对车身主频影响很小,但对车身20 Hz以上振动频谱影响较大。
A modal analysis of a SUV car frame was carried out with FEM. On this basis, a rigid- flexible coupling model of the car with flexible frame was established using multi-body dynamics software ADAMS/Car. The vertical acceleration of the gravitation center of the car＇ s body, dynamical deflection of the suspension, and dynamical displacement of the tire were analyzed and compared with those of the rigid body model. The research results showed that the PSD of the vertical acceleration of the body was reduced by 14.7 %, the dynamical deflection of the suspension was increased by 27.1%, and the dynamical displacement of the tire was decreased by 14.8 % comparing with the rigid model. In addition, the frame flexibility had little effect on the main frequencies of the body, but had large effect on the vibration PSD of the body when the frequency exceeded 20 Hz.
出处
《噪声与振动控制》
CSCD
2013年第6期96-99,共4页
Noise and Vibration Control
关键词
振动与波
车架柔性
刚柔耦合模型
多体动力学
汽车平顺性
vibration and wave
frame flexibility
rigid-flexible coupling model
multi-body dynamics
ride comfort
