Distribution Of The Load And Design Of3-D Simulation System For Dual-crane Collaborative Lifting

ABSTRACT:With the tendency of engineering construction to be larger and more complex, one single automobile crane doesn’t meet lifting requirement sometimes, the demand for dual-crane lifting is increasing. However, there are still many problems to be solved. On one hand, the risk of dual-crane lifting greatly increase compared with one single crane lifting. It will lead to catastrophic accidents due to the unreasonable load distribution and improper coordination strategy. On the other hand, the dual-crane lifting is lack of valid guidance and is carried out mainly by manual instruction with low efficiency and high operation risk. Therefore, some research on the dual-crane lifting is done in the paper.Firstly, for further research, the summa of the typical models of dual-crane lifting and the detailed description of lifting process are given by analyzing the operating characteristics of automobile cranes as well as considering the common working condition of dual-crane lifting.Secondly, after the analysis of the influencing factors of the rated load lifting capacity, the relation model between the rated load lifting capacity and the hoisting amplitude in a specified working condition is built based on Least Square Method. Meanwhile, the real-time hoisting load of each automobile crane in different hoisting models is calculated in the principle of statics. In addition, an optimization scheme for the distribution of the load based on the key point in the process of collaborative lifting is proposed. The mathematic model of the optimizing distribution is built and the optimal solution is obtained based on the genetic algorithm. Then the sequence set of the hoisting action based on the optimization scheme is gained with the principle of inverse kinematics.Finally, a three-dimension simulation system for the dual-crane lifting is designed and developed after analyzing the demand requirement of the collaborative lifting simulation system. The system provides the function of three-dimensional modeling, the simulation of dual-crane lifting process and some other auxiliary functions. The system can achieve the goal that simulating the dual-crane lifting process before real lifting operations and assisting the design staff to make an appropriate lifting plan, which can improve the efficiency and reliability of the lifting plan significantly.