刚柔耦合重型汽车建模及通过连续减速带的平顺性分析

建立了考虑车架柔性的刚柔耦合重型汽车整车模型,通过与刚性车对比,验证了所建刚柔耦合车辆模型的正确性.依据实际需求建立了三组连续减速带模型,以车身垂向加速度和各轮垂向轮胎力为评价指标,分析车辆行驶速度、减速带高度和宽度对汽车行驶平顺性的影响.研究表明,减速带的高度与车身垂向加速度和垂向轮胎力成正比,减速带宽度与车身垂向加速度和垂向轮胎力成反比,对于限速60 km/h的道路,宽度为600 mm,高度为8 mm的减速带能起到良好的限速效果,同时还能保证车辆行驶的平顺性.

Modeling of rigid-flexible coupled heavy-duty vehicle and ride comfort analysis when passing through continuous speed bumps

Considering the flexible frame, a rigid flexible coupled model for three axle heavy duty truck is built. By comparing with the rigid vehicle model, the validity of the rigid flexible coupled vehicle model is verified. Three models of continuous speed bumps are established based on actual requirements. Taking the vertical acceleration and the vertical tire force as the evaluation index, the effects of vehicle speed, the height and width of continuous speed bumps on vehicle ride comfort are analyzed. Research results show that the height of speed bumps is proportional to vehicle body vertical acceleration and vertical tire force, whereas the width of speed bumps is inversely proportional to vehicle body vertical acceleration and vertical tire force. The speed bumps with a width of 600 mm and a height of 8 mm show a good effect of speed limit at 60 km/h, and ensure the vehicle ride comfort.