Optimization and Force Analysis of Bar Linkage Hinge Point of Self Erecting Tower Crane

Abstract

In order to reduce the cylinder work force on pull tower linkage of self-erecting tower crane, the geometric parameters of hinge points about linkage mechanism were optimized. Through the force analysis to whole system of bar linkage, the cylinder force of bar linkage is regarded as optimization objective function, and the geometric parameters of working devices hinge points are used to variables, then, the optimization model is established. The optimization design is conducted based on the fmincon function of MATLAB optimization toolbox. The curve about force of the cylinder with the towers rotation angle variation can be obtained. Comparison of the results before and after optimization is showed that the maximum force of cylinder is reduced 11.5%. It is shows the optimization method is quickly and effectively. The results of parameter optimization improve the working performance of the self-erecting tower crane.

Structural optimization research on superstructure of jib crane

“…If the center of gravity about the superstructure and counterweight balance system biases the front end, we need to consume extra power when the process of slight to significant amplitude. On the contrary, if the center of gravity about the superstructure and counterweight balance system biases the back end, extra power is also needed to consume when the process of significant to slight amplitude [14].…”