共查询到19条相似文献,搜索用时 78 毫秒
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客车车身侧翻刚度仿真研究 总被引:1,自引:1,他引:0
建立客车骨架的有限元模型,依照ECE R66法规,使用LS-DYNA软件对其进行侧翻仿真分析.在此基础上,分别改变客车顶盖、侧围和前后围的材料,并再次进行仿真计算.对比仿真结果发现.增强前后围刚度可有效提高整车的侧翻刚度. 相似文献
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汽车侧翻和滚翻事故建模研究 总被引:5,自引:0,他引:5
分析汽车在侧翻和滚翻过程中的受力状态和轮胎或车身与路面的相互作用方式,建立汽车侧翻和滚翻的运动学和动力学模型,揭示汽车临界侧翻碰撞力与持续作用时间等参数的关系,推导侧翻车辆侧向速度的范围,确定滚筒模型中关键参数的选取方法。事故案例表明模型在实际应用中效果良好、定量准确、直观性强。 相似文献
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说明汽车电子悬架系统中的两种类型--后端载荷平衡系统和带变阻尼减振器的空气弹簧的各自组成部件及其结构,分析它们的工作原理。 相似文献
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前轮定位正确与否,是能否保证汽车直线行驶性能,转向灵活稳定性能,行驶的平顺性能和行驶,制动侧滑性能是否能够符合国家标准和国际标准的关键问题,本文就依维柯汽车前轮定位的调整进行了深入的分析研究,总结了出一套行之有效的调整方法,实践证明调整结果非常成功。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(1-2):109-118
A newly developed tire model for the Overturning Moment (OTM) characteristics and the analysis of the influence of OTM on vehicle rollover behavior are presented. The new OTM model was developed based on the so-called Magic Formula tire model. The concept of the new model involves identifying the difference between the simple model and the measurements to the newly defined functions. It was seen that the new model agrees very well with the measured data over a wide range of tire vertical loads, slip angles and camber angles. The influence of tire OTM on the vehicle rollover behavior was also investigated by using a full vehicle simulation in which a rather large steering angle was input. The results obtained from the vehicle simulation with three different tire models (model without OTM, simple model and new model) were compared with the experimental results. It was found that the calculated result obtained with the new OTM model agreed best with the experiment. 相似文献
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基于制动与悬架系统的车辆主动侧翻控制的研究 总被引:3,自引:0,他引:3
为提高车辆抗侧翻能力,建立了10自由度整车侧翻动力学模型,应用车辆动力学和轮胎力耦合特性,提出了一种基于差动制动和半主动悬架协同工作的车辆主动抗侧翻控制策略。通过对制动力矩的差动调节和半主动悬架阻尼力的适时匹配,实现对车辆侧翻的有效控制。根据子系统运动特性,设计了制动系统基于滑移率的积分滑模控制器和悬架系统灰模糊控制器。分别对制动、悬架控制及综合控制进行的鱼钩试验仿真结果表明,综合控制策略可有效降低危险时域车辆的侧倾角,相对于单一系统控制进一步提高了车辆抗侧翻能力。 相似文献
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基于主动转向技术的汽车防侧翻控制的研究 总被引:11,自引:2,他引:11
以汽车2自由度模型作为参考模型,建立了一种汽车防侧翻的控制方法。该方法采用主动转向技术来改变转向轮的转向角度,有效地减少了汽车的侧向加速度,提高了汽车的防侧翻的能力。在8自山度汽车动力学模型的基础上,运用主动转向技术的控制策略进行了汽车的性能仿真分析。与末采用汽车防侧翻控制系统的汽车动力学分析结果相比,汽车的主动安全性得到了增强。 相似文献
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Toshimichi Takahashi Masatoshi Hada Kozo Oyama Hideki Sakai 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2004,42(1):109-118
A newly developed tire model for the Overturning Moment (OTM) characteristics and the analysis of the influence of OTM on vehicle rollover behavior are presented. The new OTM model was developed based on the so-called Magic Formula tire model. The concept of the new model involves identifying the difference between the simple model and the measurements to the newly defined functions. It was seen that the new model agrees very well with the measured data over a wide range of tire vertical loads, slip angles and camber angles. The influence of tire OTM on the vehicle rollover behavior was also investigated by using a full vehicle simulation in which a rather large steering angle was input. The results obtained from the vehicle simulation with three different tire models (model without OTM, simple model and new model) were compared with the experimental results. It was found that the calculated result obtained with the new OTM model agreed best with the experiment. 相似文献
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汽车电路是整车上必不可少的一部分,那么整车搭铁也是汽车电路中必不可少的重要部分。所有电路均有正负极,那么负极的实现就是通过整车搭铁来实现的。搭铁对整个电路而言非常重要,搭铁点负载过多或者选择位置不合理造成搭铁不良、电磁干扰等情况的发生,都会造成不好的后果。 相似文献