Analysis of Nonlinear Local Buckling of Crane Telescopic Boom

Abstract

The problems of nonlinear local buckling of telescopic boom of truck crane in the practical working condition were studied. The arc-length method of nonlinear buckling analysis was introduced. And the corresponding solving steps were given. Based on ANSYS software and redevelopment of ANSYS with APDL (ANSYS Parametric Design Language), the solution of critical stress of nonlinear local buckling of the boom was obtained. The critical stress values of the linear buckling and those of the nonlinear buckling of the boom were compared. The influence of different initial imperfection on the critical stresses of nonlinear local buckling of the rectangular, hexagonal and dodecagonal sectional boom was analyzed. The results indicate that the presented method can solve the problems of the nonlinear local buckling of telescopic boom of truck crane effectively.

Measuring Deformations in the Telescopic Boom Under Static and Dynamic Load Conditions

“…Mechanical structures are often designed through a 'classic approach' which provides for various simplifications and ways such as the determination of the safety coefficient [1]. However, the same concepts are likely to be overcome when structures are designed for extreme conditions of use, since other unpredicted phenomena can occur [11,12]. Referring, for instance, to the case of the thin metal sheets the telescopic boom is made of, the more their thickness is reduced, the more unstable their behavior becomes [13].…”