共查询到19条相似文献,搜索用时 234 毫秒
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为实现对某商用车辆的性能评估、参数优化设计,利用MSC.ADAMS/CAR软件建立了整车动力学模型,在多体动力学的理论基础上,充分考虑减震器、橡胶衬套等元件的非线性特性。通过对整车动力学模型进行仿真分析,将悬架特性曲线与利用KC试验台得到的相应特性曲线进行比较分析,证明该多体动力学模型的合理性和适用性。 相似文献
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文中用ADAMS/Car建立带有电动助力转向系统(EPS)的整车多体动力学模型,对EPS3种助力特性进行了研究,并在所建模型基础上进行助力特性的仿真分析。 相似文献
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基于ADAMS软件,建立了某全浮式驾驶室重型卡车的整车非线性多体动力学系统模型,模型考虑了驾驶室悬置、前后悬架、转向系统、动力总成、稳定杆及附件的详细几何结构参数,以及连接处的橡胶衬套、弹簧及阻尼器的非线性特性,轮胎采用Magic Formula模型。最后利用所设计的系统对该车进行了平顺性仿真,结果表明驾驶室悬置系统能够有效地改善整车平顺性。 相似文献
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基于ADAMS软件,建立了某全浮式驾驶室重型卡车的整车非线性多体动力学系统模型,模型考虑了驾驶室悬置、前后悬架、转向系统、动力总成、稳定杆及附件的详细几何结构参数,以及连接处的橡胶衬套、弹簧及阻尼器的非线性特性,轮胎采用Magic Formula模型。最后利用所设计的系统对该车进行了平顺性仿真,结果表明驾驶室悬置系统能够有效地改善整车平顺性。 相似文献
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四轮转向车辆多体仿真与试验研究 总被引:1,自引:0,他引:1
以四轮转向原理样车为对象,运用多体动力学理论对四轮转向车辆的转向特性进行了计算机仿真研究和试验验证。对建立整车多体模型的方法进行了论述。通过对仿真数据与样车试验结果的对比分析,证明了四轮转向多体模型各类参数和控制方法的正确性和适用性。最后利用建立的整车多体模型,仿真分析了前后悬架刚度对操纵稳定性的影响,以及制动转向时的转向响应特性。 相似文献
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液压减振器非线性动态仿真和试验 总被引:5,自引:0,他引:5
本文建立复杂的减振器台架试验动力学模型,并应用多体系统动力学软件ADAMS开发出双筒液压减振器虚拟样机,进行数值仿真。在虚拟样机中采用的不对称非线性迟滞环足由速度外特性试验曲线拟合而得,突破了常规减振器建模中的速度外特性不对称双线性化模型。比较表明,虚拟样机动态仿真与台架试验结果基本相符。该样机可为优化设计和整车性能匹配提供设计平台。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(9):1241-1270
ABSTRACTThe use of vehicle dynamics simulation for the track geometry assessment gives rise to new demands. In order to analyse the responses of the vehicles to the measured track geometry defects, the integration of the simulation process in the measurement chain of the track geometry recording car is envisaged. Fast and reliable simulation results are required. This work studies the use of black-box modelling approaches as an alternative to multi-body simulation. The performances of different linear and nonlinear black-box models for the simulation of the vertical and lateral bogie accelerations are compared. While linear transfer function models give good results for the simulation of the vertical responses, their use is not suitable for the highly nonlinear lateral vehicle dynamics. The lateral accelerations are best represented by recurrent neural networks. For the training and validation on high-speed lines using measured vehicle responses, the performance of the black-box simulation outperforms the multi-body simulation. Due to the larger variability of track design and track quality conditions on conventional lines, the model performance degrades and depends significantly on the analysed vehicle type and the track characteristics. 相似文献
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基于ADAMS与Matlab的ABS模糊控制仿真研究 总被引:2,自引:0,他引:2
将多体系统动力学与智能控制理论相结合对汽车制动防抱死控制系统进行了研究,利用ADAMS/CAR建立了汽车整车的多体力学模型,模型包含了前后悬架、动力总成、转向系统、稳定杆、制动系、轮胎力学模型以及车身,同时也考虑了轮胎、衬套、弹簧、减震器等部件的非线性,准确地表达了车辆的动态特性;利用Matlab/Simulink模糊控制工具箱建立了制动防抱死控制系统的模糊控制策略,利用ADAMS/Control接口进行模型的集成、协同仿真,并将仿真结果与另一种控制策略一逻辑门限值控制的仿真结果进行了比较和分析,仿真反映出模糊控制在整车制动防抱死控制系统上的应用效果,结果表明该控制算法稳定好并具有较强的鲁棒性。 相似文献
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为了有效应用多体动力学软件ADAMS/Car进行车辆动力学研究,介绍并建立了包括汽车底盘、车身、转向、前后悬架、轮胎、动力总成等分系统的汽车整车模型,将整车系统简化为单自由度的质量-刚度-阻尼系统,建立微分方程,分别应用Matlab/Simulink和ADAMS/Car两种仿真方法,对整车模型进行了正弦激励输入下的仿真,比较计算结果可知达到稳态后的车身响应曲线非常吻合。研究表明:基于ADAMS/Car建立的整车多体动力学模型准确,可以用于实际车辆的仿真研究。 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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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(10):1480-1499
This paper proposes an approach for the validation of railway vehicle models based on on-track measurements. The validation of simulation models has gained importance with the introduction of new applications of multi-body simulation in railway vehicle dynamics as the assessment of track geometry defects, the investigation of derailments and the analysis of gauging. These applications are not only interested in qualitative predictions of the vehicle behaviour but also in precise quantitative results of the safety and comfort relevant vehicle responses. The validation process aims at guaranteeing that the simulation model represents the dynamic behaviour of the real vehicle with a sufficient good precision. A misfit function is defined which quantifies the distance between the simulated and the measured vehicle response allowing to evaluate different models at different running conditions. The obtained modelling errors are compared to the measurement uncertainty estimated for one vehicle using repeatability analysis. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(11):1349-1376
This paper presents a framework to investigate the dynamics of overall vehicle–track systems with emphasis on theoretical modelling, numerical simulation and experimental validation. A three-dimensional vehicle–track coupled dynamics model is developed in which a typical railway passenger vehicle is modelled as a 35-degree-of-freedom multi-body system. A traditional ballasted track is modelled as two parallel continuous beams supported by a discrete-elastic foundation of three layers with sleepers and ballasts included. The non-ballasted slab track is modelled as two parallel continuous beams supported by a series of elastic rectangle plates on a viscoelastic foundation. The vehicle subsystem and the track subsystem are coupled through a wheel–rail spatial coupling model that considers rail vibrations in vertical, lateral and torsional directions. Random track irregularities expressed by track spectra are considered as system excitations by means of a time–frequency transformation technique. A fast explicit integration method is applied to solve the large nonlinear equations of motion of the system in the time domain. A computer program named TTISIM is developed to predict the vertical and lateral dynamic responses of the vehicle–track coupled system. The theoretical model is validated by full-scale field experiments, including the speed-up test on the Beijing–Qinhuangdao line and the high-speed running test on the Qinhuangdao–Shenyang line. Differences in the dynamic responses analysed by the vehicle–track coupled dynamics and by the classical vehicle dynamics are ascertained in the case of vehicles passing through curved tracks. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):608-636
Recent data show that 35% of fatal crashes in sport utility vehicles included vehicle rollover. At the same time, experimental testing to improve safety is expensive and dangerous. Therefore, multi-body simulation is used in this research to improve the understanding of rollover dynamics. The majority of previous work uses low-fidelity models. Here, a complex and highly nonlinear multi-body model with 165 degrees of freedom is correlated to vehicle kinematic and compliance (K&C) measurements. The Magic Formula tyre model is employed. Design of experiment methodology is used to identify tyre properties affecting vehicle rollover. A novel, statistical approach is used to link suspension K&C characteristics with rollover propensity. Research so far reveals that the tyre properties that have the greatest influence on vehicle rollover are friction coefficient, friction variation with load, camber stiffness and tyre vertical stiffness. Key K&C characteristics affecting rollover propensity are front and rear suspension rate, front roll stiffness, front camber gain, front and rear camber compliance and rear jacking force. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):365-397
Summary The steering type of a mechanical guidance system has been used for Automated Guideway Transit (AGT) system in Japan. Recently, the single-axle bogie system has developed for AGT vehicle and applied to Yurikamome 7200 type vehicle. This paper describes dynamic characteristics of AGT vehicle with single-axle bogies. Introducing a nonlinear, 15 degree-of-freedom dynamic model, a computer simulation study on the lateral motion of the AGT vehicle with single-axle bogies are carried out. In order to show the dynamic characteristics of the single-axle bogie clearly, it is compared to that of the AGT vehicle with conventional steering system. The simulation study with actual vehicle parameters shows that single-axle bogie has suitable characteristics for AGT system. The multi-body dynamics modeler, DADS, is used to build the dynamic model of AGT vehicle with single-axle bogies and this is used to demonstrate the vehicle motion in actual guideway. Obtained results are compared to that of the field test. It is shown that the vehicle dynamic response can be obtained in realistic situation by using multibody dynamics code, that is useful for designing both vehicle and guideway. 相似文献