Contact Analysis On Outrigger’s Sliders Of Telescopic Crawler Crane

With the development of China’s wind power, petrochemical construction and many other major projects, telescopic crawler crane is widely used for its excellent lifting capacity, reliability and agility. Outrigger is an important supporting component of the crane, it is closely related to crane’ s lifting capacity and stability. The design and calculation of outrigger’s sliders are major problems. Coupling DOFs method is widely adapted to stimulate the contact situation between sliders at present, however, it ignores friction between the sliders and stress concentration usually tend to occur, thus causing huge deviation from engineering practice.Contact mechanics has been improved rapidly with the introduction of the cybernetics and the development of the computer technology, and it’s widely applied in the field of transportation, water conservancy, metal forming etc. Taking advantage of the Finite Element Method (FEM) and Boundary Element Method (BEM), non-classical contact mechanics is able to solve most of the engineering problems.The finite element model of1200t telescopic crawler crane’s outrigger is given in this thesis by the aid of FEM and analysis software ANSYS. Target surface and contact surface are determined and proper stiffness coefficient is chosen according to practical situation, then contact analysis is conducted. In addition, the differences between LINK10element stimulation, coupling DOFs method, and contact analysis are contrasted.Finally, the influence of the outrigger sliders’location, contact length and contact angle on stress and displacement of the outrigger is analyzed based on the results of contact analysis by the aid of ANSYS, providing basis for the design and calculation of sliders.