Abstract: The load conditions of three kinds of working conditions include full load bending, braking and sideslip are analyzed to determine the loads and constraints under different working conditions. Then the strength analyses for each working condition are carried on by ANSYS Workbench. According to the results, larger stresses occur at the inside, outside and under the surface of steel plate spring seat. The results show that the maximum stress of braking is beyond the yield limit of material. So front-axle beam cannot meet strength requirement. Then the improvement scheme is proposed, and the strength analysis and verification are carried on again.

Key words: Front beam, Strength analysis, Braking condition, Yield limit