Dynamics Simulation Study Of Hoisting Mechanism Of Double-girder Overhead Travelling Crane

Workshops are almost equipped with overhead cranes at home and abroad, commonly known as "bridge crane". Widely using of the overhead cranes is not only reduces heavy manual labor, but also promotes the development of related logistics and transportation machinery, it has an important position in the world’s industrial history. To make it better light, more flexibility and humane, related industries are also put forward higher requirements to overhead crane designing.To accurately analyze the dynamic performance of lifting machinery, testing is the first. But the pilot testing of heavy machinery is only after production, which means high cost, too risky and long cycle.So far, kinetic analysis mostly rely on computer-aided design to complete with three-dimensional software, like dynamic analysis, finite element analysis and other software tools. ADMAS is the most used among the kinetic analysis software, but it could not truly simulating the flexible body on a large scale and multi-body dynamics contact in solving complex nonlinear problem. This paper completed a study of the dynamic characteristics of bridge crane and the kinematics and dynamics of lifting mechanism based on RecurDyn and ANSYS. The main work is as follows:1. Established a bridge crane hoisting mechanism of CAD models and virtual assembly and related properties checking by using three-dimensional solid modeling software Solidworks.2. Built a hoisting mechanism coupled with dynamics simulation model reel and discussed the method of building wire rope of simulation model, created beam wire rope model and belt wire rope model.3. Combined with the trolley, hook, reel and wire rope as a complete system-Hoisting System, simulating the coefficient of dynamics under kinds of state. As well as the impact and dynamic load factor were analyzed to provide the basis for optimal design of cranes.This simulation results indicated that the dynamic model of hoisting mechanism of overhead travelling crane is quite correct, and the dynamic simulation based on multi-body dynamics theory is feasible. The study of the wire rope model in this paper also provides some ideas for other similar flexible body modeling and analysis. Simultaneously, it’s also proven that through computer simulation technology, could greatly reduce product development cycle time and cost, more conducive to ensure product safety and reliability.