Dynamic Analysis of Crane Boom System based on Positional FEM

The dynamic characteristics under modifying-amplitude of the crawler crane boom system are simulated by positional FEM. Based on the stress characteristics of space truss structure, the simplified FEM model for boom system is established by simulating the main jib of the boom with variable cross-section beam element and three-node beam element; the dynamic response time history of the boom system under modifyingamplitude is derived; these provide crucial theories for the design and analysis of hoisting machinery.