Correlation of Vehicle Dynamics & amp; NVH Performance with Body Static & amp; Dynamic Stiffness through CAE and Experimental Analysis

Influence of body stiffness on vehicle dynamics characteristics

“…In [1] for instance, it was established that the increase in lateral and torsional stiffness both resulted in a significant improvement in subjective evaluation of overall dynamic vehicle response. This was in [1] and [2] further established with objective data where significant improvements in yaw gain and decrease in time lag was observed. Up to 14% of improvement in the phase lags of the vehicle for steering input frequencies of 0.5 Hz is seen through increasing the global torsional stiffness of the car.…”

“…Vehicle dynamics characteristics are essential for driving experience of the customer and may be subdivided into handling, steering and ride comfort characteristics. A major sub-system in vehicle is body-in-white and, in order to support the requirement setting of this sub-system, it is essential for both road [1][2][3] and rail vehicles [4][5] to properly understand the influence of local and global stiffness properties on vehicle dynamics characteristics.…”

“…Up to 14% of improvement in the phase lags of the vehicle for steering input frequencies of 0.5 Hz is seen through increasing the global torsional stiffness of the car. Regarding local stiffness, it is found that increasing the local stiffness at the front lower control arm attachment points also results in an improvement in overall vehicle response [2]. However during virtual objective testing of a different vehicle no significant change in yaw rate response (gain and response time) could be found [3] between a rigid body and that with a flexible body with a 50% reduction in the Young's modulus of the vehicle body.…”

Parametric Modal Study and Optimization of the Floor Pan of a B-Segment Automotive Using a Hybrid Method of Taguchi and a Newly Developed MCDM Model

“…The stiffer a road vehicle's body, the better ride, handling and NVH performance is obtained Chaturved et al (2010). The overall stiffness of a road vehicle depends on the local stiffness of the constituent parts Chaturved et al (2010). Hence, the target of stiffening a vehicle's body is automatically cascaded to a set of new targets: stiffening the constituent parts of the Body in White (BIW).…”

“…These investigations have demonstrated that the overall response of the vehicle is improved with a stiffer body due to stiffer connection between front and rear components . The stiffer a road vehicle's body, the better ride, handling and NVH performance is obtained Chaturved et al (2010). The overall stiffness of a road vehicle depends on the local stiffness of the constituent parts Chaturved et al (2010).…”