共查询到19条相似文献,搜索用时 437 毫秒
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基于数值模拟和试验研究了某SUV主驾驶员座椅在加速时抖动较大的问题,结果表明,主驾驶员座椅2号安装点的振动加速度峰值在44.5 Hz附近远超目标值,是引起座椅抖动较大的主要原因。结合基于平均驱动自由度位移法所获得的理想挂钩布置点、排气系统结构和车身底部空间,优化了挂钩位置。通过挂钩尺寸和搭接结构优化,大幅提高了排气系统挂钩的一阶局部模态。优化方案各挂钩-主驾驶员座椅安装点的振动传递函数峰值明显降低,最大降幅百分比为36.7%。样车道路测试时主驾驶员座椅靠背测点的振动加速度峰值由1.19 mm/s2降至0.66 mm/s2,主观评价结果满足设计要求。 相似文献
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P. E. Pfeffer M. Harrer D. N. Johnston 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2008,46(5):413-428
For the on-centre handling behaviour of vehicles the steering system is absolutely important. To investigate the interaction of the vehicle and steering system a validated, especially tailored simulation model was developed. Some meaningful vehicle and steering system parameters are altered to show the influence on steering wheel torque, steering feel and understeer. The results underline the importance of an accurate steering system model. Identified measures to improve the centre feel and steering response were a stiffer torsion bar, a higher cornering stiffness or a lower overall steering ratio. The steering response, however, suffers when the centre feel is improved by a higher trail. The steering rack friction reduces mainly the steering response while the steering column friction decreases the centre feel whereas a stiffer torsion bar lessens the understeer tendency. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):413-428
For the on-centre handling behaviour of vehicles the steering system is absolutely important. To investigate the interaction of the vehicle and steering system a validated, especially tailored simulation model was developed. Some meaningful vehicle and steering system parameters are altered to show the influence on steering wheel torque, steering feel and understeer. The results underline the importance of an accurate steering system model. Identified measures to improve the centre feel and steering response were a stiffer torsion bar, a higher cornering stiffness or a lower overall steering ratio. The steering response, however, suffers when the centre feel is improved by a higher trail. The steering rack friction reduces mainly the steering response while the steering column friction decreases the centre feel whereas a stiffer torsion bar lessens the understeer tendency. 相似文献
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Y. G. Cho 《International Journal of Automotive Technology》2009,10(4):431-439
In this paper, an analytical model with suitable vehicle parameters, together with a multi-body model is proposed to predict
steering returnability in low-speed cornering with what is expected to be adequate precision as the steering wheel moves from
lock to lock. This model shows how the steering response can be interpreted in terms of vertical force, lateral force with
aligning moment, and longitudinal force. The simulation results show that vertical steering rack forces increase in the restoring
direction according to steering rack displacement for both the inner and outer wheels. As lateral forces due to side-slip
angle are directed toward the medial plane of the vehicle in both wheels, the outer wheel pushes the steering wheel in the
returning direction while the inner wheel does not. In order to improve steering returnability, it is possible to increase
the total steering rack force in both road wheels through adjustments to the kingpin axis and steering angle. This approach
is useful for setting up a proper suspension geometry during conceptual chassis design. 相似文献