The Finite Element Analysis and the Optimization Design of the Yj3128-type Dump Truck's Sub-Frames Based on ANSYS

The article mainly studies the YJ3128-type dump truck's sub-frames, for the fatigue crack occurred in the Subframe witch has worked in bad condition for 3 to 5 months, the truck's working conditions and the load features are researched, and ANSYS is used to analyze the stress of the sub-frame. According the deferent stress, the reason of the fatigue cracks’ occurring is researched too. At last an improvement and optimization to the structures of the frame is provided. For the stress of YJ3128-type dump truck there is no improved research methods and theoretical support, so the analysis in this paper and the proposed improvement scheme has important reference value.