基于道路模拟试验的强化载荷谱编制方法

The method of load spectrum accelerate editing based on road simulation test

室内道路模拟试验已成为汽车整车及其零部件高品质、高效率开发的重要手段,但道路模拟试验强化载荷谱的编辑技术仍是亟待深入研究的重要问题。以某试验场实车采集的轮心六分力信号和关键点监测信号为基础数据,分别采用删小量法、损伤保留法、线性强化法对实测信号强化编辑和浓缩,基于Miner疲劳损伤累积理论分析了载荷谱的疲劳损伤。从疲劳损伤角度进一步探讨不同强化编辑法的效率及精度。结果表明:3种载荷谱强化编辑法都在损伤等效的情况下,提高了试验效率。综合考虑多方面因素,1.2倍的线性强化载荷不仅保留了时域损伤特性,其强化效果也最好,相对于另外两种强化方法更具有优势。

Road simulation test has become an important means to develop the vehicle key parts with high quality and high efficiency,but the spectrum editing technology is still an important issue to be studied. This paper uses the wheel center six-component force signal and key point monitoring signals collected by a real vehicle in a test field as the basic data,the deleted signal method,damage retention method,and linear reinforcement method are used to enhance and edit,and the fatigue damage of load spectrum is analyzed based on Miner’s rule of fatigue damage accumulation. Further explore the efficiency and accuracy of different enhanced editing methods from the perspective of fatigue damage,the results show that three load spectrum enhancement editing methods are all improve the test efficiency under the condition of damage equivalent. Taking all factors into consideration,the 1. 2-time linear strengthening load not only retains the time-domain damage characteristics,but also has the best strengthening effect. Compared with the other two strengthening methods,it has more advantages.