三种风作用下汽车起重机斜坡吊装的稳定性分析

Analysis on hoisting stability of truck crane under different wind loads

针对汽车起重机在不同风载工况下斜坡工作时稳定性问题,通过分析汽车起重机在三种风载工况下斜坡吊装工作时受力情况,构建斜坡临界角度数学模型,得出了计算斜坡临界角度的通解,并可求出超过斜坡临界角度后相应起吊高度范围.研究结果表明:在斜坡工况下工作时,斜坡角度在临界角度之内,起吊高度对汽车起重机稳定性的影响可忽略不计;超过斜坡临界角度后,汽车起重机在相应起吊高度范围内处于稳定状态.随着斜坡角度的增加,起吊高度范围越来越小.该研究的成果可试用于不同型号汽车起重机稳定性研究.

In view of the problem of the stability of the truck crane under the condition of the different wind load, by analyzing the factors that influence the stability of slope hoisting of truck crane, this paper built a mathematical model of the critical slope angle, obtained the general solution for calculating the critical angle of the slope, and can be used to find out the lifting height accordingly when exceed the critical Angle. Results of study show that in the slope condition, the truck crane is in a stable state when the slope angle is in the critical angle, and the influence of lifting height can be ignored; the automobile crane is in a stable state in the lifting height of the corresponding range when exceed the critical angle of slope. With the increase of slope angle, lifting height is smaller and smaller. The research results can be suitable for different type truck crane stability study.