共查询到16条相似文献,搜索用时 218 毫秒
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轿车行驶过程中车轮随着路面不平度和车速的变化而上下跳动,车轮通过摆臂带动悬架其他构件运动,并使这些构件发生相应的变形。为分析悬架构件的运动变形对不同车轮定位参数的影响,根据某轿车前后悬架以及其他主要总成的结构尺寸和特点,运用多体动力学软件Adams建立某轿车整车多刚体动力学模型,并对部分悬架导向元件进行柔性化处理,从而建立整车刚柔耦合模型。随后进行悬架运动学仿真,得到车轮定位参数的仿真变化曲线,并与运动学参数实际测试曲线作对比分析,发现整车刚柔耦合模型运动学仿真结果更接近实际测试曲线。仿真分析结果可以为轿车悬架系统设计与选型提供一定的参考。 相似文献
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《汽车工程》2017,(6)
大吨位矿用自卸车的行驶工况非常恶劣,严重影响车辆的行驶平顺性和操纵稳定性;同时,矿区路面为沙壤土路面,其变形对矿用自卸车的振动也有显著影响。针对此问题,本文中将同时考虑垂向、纵向和侧向相互作用的轮胎-地面接触模型与整车多体动力学模型集成,实现了在变形地面条件下的车辆地面耦合系统的建模,进行ADAMS/Simulink联合仿真,并通过实车道路试验验证了模型的准确性。结果表明,采用计及路面变形的动力学模型,仿真精度提高了7%以上。在此基础上,通过建立2阶响应面近似模型,利用多岛遗传算法对自卸车油气悬架和横向稳定杆参数进行协同优化,保证了在不破坏整车操纵稳定性的前提下,有效改善了车辆的行驶平顺性。 相似文献
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介绍一种用于铰接式自卸车的转向流量阀,通过对其结构的分析,得出了其流量放大的原理,从而解决了铰接式自卸车使用普通的液压转向装置,无法为转向执行元件提供足够流量的难题,保证了铰接式自卸车正常安全实现转向. 相似文献
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VOLVO产品系列广泛,前、后桥载荷及悬架型式、驱动型式多种多样,因此在用VOLVO底盘改装自卸车时,应选择刚度大的悬架,尽可能短的轴距,以保证整车在卸货时的稳定性.下面以VOLVO FM12 6X4底盘为例,把改装后倾自卸车的心得介绍给同行. 相似文献
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汽车机械系统的建模、分析与求解始终是动力学的关键问题,为快速准确地求解分析,文章借助多刚体系统动力学的拉格朗日法对汽车悬架进行分析,建立了基于多刚体系统动力学的主动悬架系统模型,并采用九点控制策略进行了理论分析和计算机仿真。仿真结果表明,以多刚体动力学方法同九点控制策略相结合的汽车悬架系统性能良好。 相似文献
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Liang Ling Qinghua Guan David P. Thambiratnam 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2017,55(1):1-22
Trains crashing onto heavy road vehicles stuck across rail tracks are more likely occurrences at level crossings due to ongoing increase in the registration of heavy vehicles and these long heavy vehicles getting caught in traffic after partly crossing the boom gate; these incidents lead to significant financial losses and societal costs. This paper presents an investigation of the dynamic responses of trains under frontal collision on road trucks obliquely stuck on rail tracks at level crossings. This study builds a nonlinear three-dimensional multi-body dynamic model of a passenger train colliding with an obliquely stuck road truck on a ballasted track. The model is first benchmarked against several train dynamics packages and its predictions of the dynamic response and derailment potential are shown rational. A geometry-based derailment assessment criterion is applied to evaluate the derailment behaviour of the frontal obliquely impacted trains under different conditions. Sensitivities of several key influencing parameters, such as the train impact speed, the truck mass, the friction at truck tyres, the train–truck impact angle, the contact friction at the collision zone, the wheel/rail friction and the train suspension are reported. 相似文献
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Yang Chen Yunbo Hou Andrew Peterson 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2019,57(4):617-635
Failure mode and effects analysis are performed for a dual levelling valve pneumatic suspension to determine the effect of suspension failure on tractor–semi-trailer dynamics, using a detailed model of suspension pneumatics coupled with a truck dynamic model. A key element of failure analysis in suspensions with one or two levelling valves is determining the effect on the vehicle body roll when one or more failures occur. The failure modes considered are mainly the suspension pneumatic components, including clogged levelling valve, bent control rod, disabled lever arm, and punctured or leaking connectors and pipes. The pneumatic suspension is modelled in AMESim, with critical parameters established through component testing. Upon validating the AMESim component model experimentally, the pneumatic suspension model is integrated into TruckSim for studying the consequences of suspension failure on truck dynamics. The simulation results indicate that the second levelling valve in a dual-valve arrangement brings a certain amount of failure redundancy to the system, in the sense that when one side fails, the other side can compensate for the failure. Equipping the trailer with dual levelling valves brings an additional stabilising effect to the vehicle in the event of tractor suspension failure. 相似文献