自行火炮履带板疲劳寿命预测仿真研究

Research on Simulation of Predicting Fatigue Life to Creeper Tread of Self-propelled Gun

履带板的疲劳寿命是自行火炮维修保障体系中急缺的指标。由于履带板的载荷历程难以测试和载荷作用部位难以确定,疲劳寿命预测很难进行。通过ATV建立自行火炮行走系虚拟样机并构建数字化等级路面进行仿真,虚拟测试出履带板各载荷分量的历程并通过推断载荷分量的作用机理确定其作用部位。将有限元静应力分析结果导入MSC.Fatigue进行仿真分析,得到了履带板的疲劳寿命。同实际寿命对比,仿真寿命具有较高的可信性。提出的方法对于其它机械系统构件的疲劳寿命评估也有借鉴意义。

The fatigue life of the creeper tread is lacking in the maintenance support system of the self-propelled gun. It is very difficult to predict the fatigue life of the creeper tread because both testing load history and fixing on load locations are not easy to realize. The virtual prototype of a self-propelled gun movement system was established in ATV （ADAMS tracked vehicle） and the digitized road surface was established, and then the histories of all load components were measured out. Though deducing the mechanism of all load components, their locations were fixed on. The stress results after finite element analysis were led into MSC. Fatigue, and then the fatigue life of the creeper tread was predicted after simulation. Compared with the actual fatigue life, the simulated fatigue life is credible. The method proposed can be referenced to predict the fatigue lives of components in other mechanism.