In view of the lack of road spectrum in the simulation of rocket launcher marching strength test road surface,this paper puts forward a method that the marching strength grade 2 and 3 test pavements based on graded power spectrum area is equivalent to the national standard A to H grade road surface.Firstly,a model of marching strength grade 2 and grade 3 test pavements is established by using random generation method and roughness fusion method,and then a graded power spectrum area method is proposed to obtain the proportional relationship of grade 2 and grade 3 pavements under unevenness grade.Finally,the load-time history of the hanging plate of the rocket launcher before and after equivalent on the second and third grade road surface is obtained,and the fatigue life of the hanging plate is predicted and compared by the combination of multi-body dynamics and finite element method.The results show that the life errors of the equivalent and post-equivalent hanging plates of grade 2 and grade 3 pavements are 3.17%and 8.17%,respectively.The graded power spectrum area method can be used to evaluate the road roughness,which is a supplement to the existing pavement grade evaluation method.
关键词
路面不平度/路面建模/功率谱面积/等级评定/疲劳寿命
Key words
road roughness/road modeling/power spectrum area/grade evaluation/fatigue life
维普
万方数据