Integrative Stability Analysis Of The Combined Arms Of Crawler-Crane

With the more sophisticated design require of crawler crane, the crane booms are increasingly trend to large-sized and flexible, and the structural stability problems inevitablely occur. Especially the stability of the combined arms is the biggest problem of the major domestic engineering machinery manufacturers and university. With the rapid development of computational mechanics, the finite element software is gradually applied to engineering design. ANSYS is the typical one. However, it is often verycumbersome when Arm stability analysis in ANSYS, and the equivalent boom is without considering the reverse effect of the booms, the author studies the boom structure, the simple finite element model, ANSYS linear buckling analysis and non-linear stability analysis, the problem of equivalent section stiffness, the ANSYS APDL language and MATLAB GUI interface design techniques. The major research and the achievements are as follows:(1) By means of the problem of ANSYS modeling and stability calculation, propose a new simplified method of the finite element model and validate the feasibility and rationality of the method.(2) Studying the finite element theory and linear buckling analysis and nonlinear buckling analysis in ANSYS.(3) Based on the mechanical properties of thin-walled structures and stiffness equivalent theory to determine the simplified unit in ANSYS, and compared with the complex model before to determine the rationality of this simplified method.(4) Analyzing the simplified model of the combined arms for linear buckling analysis and nonlinear buckling analysis in ANSYS, and get some regular factors of arm stability.(5) Write a crawler crane arm stability calculation program, the program takes full advantage of the APDL language of ANSYS and MATLAB GUI interface design, users can take advantage of the program to analyze the issue of boom stability.