Research on Fatigue Life Prediction of Planetary Cage in Caterpillar Base on Running Simulation Test

Abstract

Planetary cage in caterpillar is designed with the static strength theory. While the dynamic characteristics of planetary parts in different working condition is difficult to obtain with the limit of traditional method, so research on reliability and fatigue life prediction of planetary cage is very difficulty which result that designed life is much longer than practical life. The reliability of caterpillar is affected deeply. The dynamic loads suffered by planetary cage in different working condition is obtained based on running simulation with MSC.ATV, and then the fatigue life of planetary frame is calculated with fatigue life prediction system of planetary cage. The study case proves the new method is feasible. Research on planetary cage in caterpillar based on running simulation test resolve not only the technical problem of loads in different work condition but also close connection with engineer, so the research have very important utility significance.