Research on the influence of lifting mass on dynamic responses of telescopic cranes considering boom deformation

Abstract

 The paper studies the influence of lifting mass on the dynamic responses (DRs) of telescopic cranes with consideration of boom deformation. The companion coordinate method with Ritz-Galerkin approximation is used to build the model and the differential equations describing the DRs of a telescopic crane with four elastic joints. In the generated dynamic model, the stiffness and damping coefficients of the cable and the hydraulic cylinder for lifting and lowering the boom are considered. Based on this, the paper investigates the dependence of the DPs of the telescopic crane when lifting and lowering the boom on the lifting mass. The investigation results are the system dynamic responses such as the displacement, velocity, acceleration of the boom oscillation, and the tension of the cable hanging the payload, which is the basis for improving the operating quality and serving the control problem of the crane.