基于虚拟试验场的牵引车动态载荷研究

Research on Dynamic Load of Tractor Based on VPG

基于Adams软件的虚拟试验场动态载荷分解技术在乘用车耐久性能开发领域广泛应用。对于重卡车型,由于车辆模型复杂、参数有限且测试难度大,虚拟试验场技术的应用推广受到限制。搭建某牵引车整车多体动力学模型及虚拟试验场仿真环境,同时采集试验场工况下的实车载荷谱数据并与虚拟试验场动力学仿真分析提取的动态载荷进行对比。使用相对伪损伤比值、频谱分析等评估比利时、扭曲路、搓板路等典型路面工况下仿真与实测载荷谱数据的差异。结果表明:基于虚拟试验场的动态载荷提取技术可应用于牵引车车型且可实现较高的精度,是一种获取试验场耐久工况载荷谱的有效方法。

The dynamic load decomposition technology of VPG based on Adams is widely applied in the field of passenger car durability performance development.For heavy truck,the application and promotion of VPG are limited due to the complexity of vehicle models,limited parameters,and high RLDA testing difficulty.The complete vehicle multi-body dynamics model of a tractor and virtual proving ground simulation environment are built based on Adams.The real vehicle load data acquisition of the proving ground events was carried out and compared with the dynamic loads extracted from dynamic simulation analysis of the virtual proving ground to verify the model accuracy and load accuracy.Relative pseudo damage ratio,RMS value ratio,and spectrum analysis were used to evaluate the differences between simulated and measured load data under typical road conditions such as Belgium,twisted roads,and washboard roads.It is proved that The dynamic load extraction technology based on virtual proving ground can be applied to tractor models and achieve high accuracy,which is an effective method for obtaining the load data of proving ground durability events.