Design And Optimization On The Lattice Boom System Of Mobile Harbor Crane

As multi-purpose lifting equipment used in the port, mobile harbor crane, which is developed from type crane, has a good mobility, applicability and economic. The truss boom system is an important part of the crane, which not only pursuit of the excellent structural performance when designing, but also the road is required to move horizontally, and the cylinder stroke and force is required to meet requirement during luffing process. In this paper, the integrated use of analytical method and parametric finite element method for the design and optimization on the rectangular truss boom system of mobile harbor crane is studied. The main research results are as follows:(1) The boom forces analysis and typical computing conditions selection were done by establishing the mechanical model of the boom. Theoretical formulas of road trajectory, cylinder stroke and force were derived, and the calculation methods of strength, stiffness and stability were given.(2) The design software of truss boom system is programmed based on Matlab/GUI, and detailed design calculations for the truss boom system of 640 tm mobile harbor crane based on design software is developed. Eventually design parameters of the truss arm system were obtained, and the reliability and practicality of design software is verified from the perspective of theory and FEA.(3) The effects of different types of luffing cylinder connecting structure on truss structure properties of mobile harbor crane based on APDL parametric modeling, and the connecting structure type of cylinder that more suitable for the truss boom structure of mobile harbor crane is determined.(4) In order to reduce the boom weight of mobile harbor crane, the optimization on the truss boom system designed by using the developed software are done based on APDL parametric modeling, and the boom weight reduced by 9.97% after optimization.