摘要
就起重机机械起升机构多质点动力学系统建立了多质量多自由度的动力学模型,利用MATLAB/SIMULINK构造相应的仿真系统,采用自适应步长四阶Runge-Kutta法求解系统的微分方程组,对瞬间离地、悬空起动、空中制动等一系列典型工况进行动态仿真,对起升机构的动态性能进行了初步探讨并获得了有实用价值的成果。所得分析结论进一步完善了先前理论分析和数值计算研究成果,研究方法进一步提高了起升机构的建模精度,理论上可以考虑每一离散质点的运动从而使模型更加与实际系统一致。
Considering the difficulties of mathematical analysis and the complex computer programming of numerical methods in solving dynamical problems of the multi-body dynamic system for the hoisting mechanism of a crane, in this paper, a multi-mass-multi-freedom model is set up and the simulation system of the model is built up applying MATLAB/SIMULINK toolbox. The differential equations of the model is solved with adaptive-step fourth-order Runge-Kutta method. In the study, the typical work conditions of the hoisting mechanism, such as start rise from ground, start rise/down in air, brake conditions, were simulated. The dynamic performance of the hoisting mechanism is studied and the results obtained are valuable to practice. This study improves the modeling accuracy of the hoisting mechanism and the results of precious theoretical analysis and numerical computation conclusions. The movement of every discrete body of the system can be modeled applying the methods suggested by this study and more consistent results between model and actual hoisting mechanism can be achieved.
出处
《重庆建筑大学学报》
CSCD
2003年第6期67-73,共7页
Journal of Chongqing Jianzhu University
关键词
起重机
起升机构
动态仿真
机械动力学
crane
hoisting mechanism
mechanical dynamics
SIMULINK
simulation
