According to the viewpoint of optimum design,the optimum dimensions of the rectangle booms\+′ sections are obtained,based on the force analysis and the deformation restrains.

The bending Of a rectangular cantilever plate is a very complicated problem in the theory of Kirchhoff plate.

The analytical solution for bending of orthotropic rectangular cantilever plates is investigated by use of Stockes transformation of double variable function.

This paper emphasis to diacuss non-symmetric bending of cantilever rectangular plate support concentrated force on arbitrary point.

Taking the polynomial and trigonometric function as flexural funciton,the paper analyses the problem of the bending of orthotropic cantilever rectangular plate according to Rayleigh-Ritz method of the theory elasticity.

Finally,this proposed method is applied to designing the optimal locations for measuring the asymmetric bending deformation of a cantilever rectangular plate.

This provides the crane jib's improving and design with some foundations.

Some foundations to crane jib′s improving and designing was provided.

By means of ANSYS software,finite element analysis of every boom of truck crane under different work condition was described in detail.

The stresses on the boom and duplex pull rod are tested with resistance-strain method.

Vibration Mode Analysis of Crane Jib using Finite Element Method;

Modal Analysis Using Finite Element for Crane’s Jib;