Research On Dynamic Simulation Of The Rubber-Tired Container Gantry Crane Based On Virtual Prototype

As the most widely used lifting machine in port, the demands for Rubber-Tired Container Gantry Crane(RTG) have increased rapidly accompany with the development of the port logistics, which has accelerated the innovation of the design methods and design technical greatly for RTG. Since the20th century, with the development of computer technology, computer technology has been combined perfectly with the mechanics, applied mathematics and graphics. And all of these have made substantial development in mechanical engineering research. At present, the design of port machinery is mainly relied on the method of static design. In other words, we must select a dynamic load coefficient based on our designing experience in considering the effect of dynamic load. But, we can not find out the actual dynamic load effect on the structure that we interested most time in this way. It is a feasible way to adopt virtual prototype technology in the process of the port machinery development in solving this problem. First, using the computer, we can establish the virtual prototype model of the practical machine. Through adding incentives to the model, it can simulate the operating conditions of the crane institutions and structure with load change operation. Computing the dynamic effect in the virtual prototype’s working process, we can estimate various parameters under the dynamic effect and the actual operation process of the practical machine.With one kind of RTG which has been put into use as background, this paper bases on the technique of virtual prototype and adopts the method of Rigid-Flexible multiply model to solve the complex system of the RTG with utilizing software platform of UG, Hypermesh, ADAMS and ANSYS. Through simulating the operation conditions of the RTG under the conditions that load and running state changes with time, the paper get the simulation date which closely linked with the practical prototype. Also, by the contrast with the consequence that achieved by conventional method, it verifies the result of the application of this technology in the crane design. The main contents include:(1) Base on the multi-body dynamics theory, this paper discusses the technology of the building of the Rigid-Flexible multiply model. And through establishing the crane multi-body dynamics model, this paper also researches the characteristics of the dynamic load under the different operating conditions of the crane.(2) Through executing the multi-body dynamics simulation for the Rigid-Flexible multiply model that built before, we can get the corresponding kinetic parameters and the responding of the RTG that inspired by the different system parameters. Also by comparing the outcome with the results that get by the traditional method, we can prove that it is feasible in analyzing the dynamic responding of the complex system by using the Rigid-Flexible multiply model. All of these can provide a theory basis and reference for the analysis of dynamics simulation for more complex mechanical system.In a word, using the virtual prototype technology and structural dynamics simulation technology in analyzing the RTG is a further research in applying the computer simulation technology in the engineering field. And the research results can provide a calculation and analysis method to the crane dynamic design.