基于分级功率谱面积的火箭炮行军强度试验路面等效方法  

Road equivalent method of rocket launcher marching strength test based on graded power spectral area

作　　者：马清添 朱隽垚 朱俊 于存贵[1] 范慧 周成[1] Ma Qingtian;Zhu Juanyao;Zhu Jun;Yu Cungui;Fan Hui;Zhou Cheng(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;China Arms Industry Corporation Jiangshan Heavy Industry Research Institute Co.,Ltd.,Xiangyang 441057,China;Beijing Institute of Space Launching Technology,Beijing 100076,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]中国兵器工业集团江山重工研究院有限公司,湖北襄阳441057 [3]北京航天发射技术研究所,北京100076

出　　处：《南京理工大学学报》2024年第6期719-728,共10页Journal of Nanjing University of Science and Technology

基　　金：国防基础科研基金(6142604220102)。

摘　　要：该文针对火箭炮行军强度试验路面仿真缺少路面谱的问题,提出基于分级功率谱面积的行军强度2级、3级试验路面与国家标准A级至H级路面等效的方法。首先利用随机生成法和不平度融合法建立行军强度2级、3级试验路面模型;其次提出分级功率谱面积法,得到2级、3级路面在不平度等级下的比例关系;最后获取2级、3级路面等效前与等效后的火箭炮的挂弹板载荷-时间历程,运用多体动力学和有限元法相结合的方法预测并对比挂弹板的疲劳寿命。结果表明:2级、3级路面等效前与等效后的挂弹板寿命误差分别为3.17%和8.17%,利用分级功率谱面积法能较好地评价路面不平度,是对现有路面等级评定方式的补充。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 

分 类 号：TJ713[兵器科学与技术—武器系统与运用工程]