Out-of-the-Lifting-Plane Stability Analysis of Crane Telescopic Boom with Cable Exerted at the Top

Abstract

To enhance the carrying capacity of the crane variable cross-section telescopic boom, the usual practice is using the cable at its top end, it makes the out-of-the-lifting plane stability problem of crane telescopic boom become solving the Euler critical force with follower force. This paper established the deflection differential equations of crane telescopic boom model which under actions of cable, with proper boundary conditions, the recurrence formula of buckling characteristic equations were presented, and some practical applications were given. The influence on buckling critical force of crane boom due to the ratio of the length of cable and crane boom was discussed. Took certain four-sectioned telescopic boom as example, the destabilizing critical force was calculated, the result showed that in comparison with the ANSYS method, the buckling characteristic equations in this paper is completely correct.

Research on Jib Performance of Crane in Hoisting Wind Generator

“…Taking a four-section telescopic arm as an example, the critical buckling force is calculated. The results show that compared with ANSYS method, the buckling characteristic equation established by him is completely correct [2]. These advances have played a huge role in infrastructure construction and safe upgrading of clean energy wind turbines.…”

“…The continuous promotion of wind power generation and the rapid development of wind turbine technology put forward higher requirements for the safe hoisting of cranes. Teng et al adopted the allowable stress and limit state methods of Chinese and European crane structural design standards (GB3811-2008 [1]) and (FEM-1998 [2]) and correspondingly explained in detail the calculation methods of strength, static and dynamic stiffness, buckling of rods and plates, and comprehensive inspection of fatigue. Taking an actual crane as an example, according to the above-mentioned three specifications, the metal structure of the crane is redesigned and all aspects of inspection are carried out to ensure that the strength, buckling and fatigue indexes reach 90% of the allowable values.…”