关键词: 车辆工程；虚拟试验场；载荷输入；疲劳耐久；载荷精度

Abstract: The durability performance simulation is strongly correlated with the accuracy of the input load. The output load of the traditional road spectrum iteration can meet the accuracy requirements of endurance performance development, but the iteration relies on the real vehicle for road spectrum acquisition, which takes a long period of time, and cannot provide a strong reference for structural design in the early stage of project development. Virtual proving ground (VPG) can extract loads as the input of durability development, and its efficiency and economy are far beyond the reach of traditional fatigue load iteration. However, whether the accuracy of VPG meets the durability development needs to be studied. Therefore, based on VPG technology, a whole vehicle dynamics model was established in ADAMS, and VPG calibration was carried out on the basis of road spectrum data and suspension K&C test data collected from real vehicles. Through the analysis of calibration results of twisted road and Belgian road, it is verified that VPG can provide accurate and reliable load input for the development of fatigue durability performance in the early stage of vehicle development.

Key words: vehicle engineering; virtual proving ground; load input; fatigue durability; load accuracy