Abstract: Aiming at the strength checking problems of foldingarm structure for selfpropelled aerial work platform, the driving force of foldingarm hydraulic cylinder was analyzed by using the geometric method and coordinate method of the principle of virtual work and traditional statics method respectively, three groups of foldingarm hydraulic cylinder driving force expressions were obtained. The foldingarm structural parameters of a certain type selfpropelled aerial work platform were substituted into three groups of hydraulic cylinder driving force expressions. The curve of hydraulic cylinder driving force changing with the amplitude angle γ was drawn by Matlab, and the curves obtained by the three methods were compared and analyzed. The results indicate that the maximum deviation of the three methods is less than 2%, which verifies the accuracy of the result. The above method can be applied to other foldingarm type aerial work platform, and provide theoretical basis for structural optimization design of such aerial work platform.
Key words: aerial work platform; foldingarm; driving force; principle of virtual work; statics