The Out-of-Plane Stability Analysis of Crane Jib with Two Symmetric Drawbars

Abstract

The out-of-plane stability of the crane jib with two symmetric drawbars is studied. Differential equation with two non-conservative forces caused by the two symmetric drawbars is established in critical condition. According to the boundary conditions and proper parameter processing, the out-of-plane characteristic equation is obtained for the crane jib. Comparison with the ANSYS results verified the correctness of the method. And special cases are given to show the consistency of the method used in this paper and that with one drawbar given by the Chinese Design Rules for crane (GB3811-2008). The contribution of the angle between two symmetric drawbars to the out-of-plane stability of the crane jib is also discussed. The results show that, the crane jib with two symmetric drawbars has higher out-of-plane stability than that with one drawbar, and the increase of the angle between the two symmetric drawbars will lead to the significant increase of the out-of-plane stability of the crane jib.

Analytical method for the out-of-plane buckling of the telescopic boom with guy cables

“…The finite element method is the main option for analysis of that problem currently. 21,22 The characteristic equation of the telescopic boom with the spatial double cables is established in Lu et al, 23 the telescopic boom is simply considered as a uniform beam, which is inconsistent with the actual model. Hence, the main purpose of the present paper is to propose an analytical method for the out-of-plane buckling of the telescopic boom with the spatial symmetric guy cables.…”

“…The finite element method is the main option for analysis of that problem currently. 21 , 22 The characteristic equation of the telescopic boom with the spatial double cables is established in Lu et al, 23 the telescopic boom is simply considered as a uniform beam, which is inconsistent with the actual model.…”