Buckling failure analysis of truck mounted concrete pump's retractable outrigger

In this research work, the failure reasons of retractable outrigger were analyzed by nonlinear finite element method firstly. Then the actual failure modes and loads were obtained by working condition simulation and destruction test on the two original designs. Both results from analysis and test show that the failure is due to instability of first class retractable outrigger side plate attached with fixed leg. Finally, the front outrigger was strengthened and this optimization was certified to meet bearing requirements through nonlinear finite element analysis and loading test. The method could be used to analyze buckling failure problem of similar structure.