Finite Element Analysis Of Rough Terrain Crane Chassis

Rough Terrain Crane is a important engineering crane,it consisting of four major components of the outrigger,chassis,pedestal,lifting arm.it has good mobility, high efficiency is widely used in ports, terminals, stations , airports and construction sites, mainly used to load and transport items, building structure installation and construction materials, prefabricated goods loading. The chassis as one of the most important parts of Rough Terrain Crane, played the important role of in Rough Terrain Crane, working under a large load bearing chassis on the ground through the outrigger to withstand the weight of the crane and lifting cargo, the load in the form of vertical bending, torsion, lateral bending, and their combination, and most chassis used by the steel welded together a single room or room box shaped structure, therefore, chassis is weak link in the whole crane, once the main chassis structural have problems, and will lead the whole crane lethal damage. When the crane moving the cargo, road resonance may cause the chassis syntony to reduce the life of the chassis, so chassis for rigidity, strength and dynamic characteristics analysis, design to meet the strength and stiffness requirements, reasonable structure,light weight,the dynamic characteristics of a good chassis, promoting the development of our country Rough Terrain Crane has very important significance.This topic from the actual situation, to the largest tonnage of 75 ton Rough Terrain Crane in our country at present product background, the finite element theory, software tools and test combination, the main chassis of the two Rough Terrain Crane program in the most dangerous working conditions of Static and Dynamic finite element analysis, and to calculate the stress and experimental comparison, Queding trailers prescribed safety coefficients have sufficient stiffness and strength, are the displacement, stress cloud of frame structure to provide basis for improvement and optimization. Through modal analysis and harmonic response chassis analysis, chassis natural frequency, vibration mode and the displacement, stress curve with frequency, guiding the processing and use of the chassis, to avoid the chassis moving in the cranes in the resonance. In the research process full use of existing computer software, I-DEAS software program to create a two-dimensional geometric model of the chassis, the HyperMesh to establish its pre-processing software, finite element model using ANSYS software to calculate and analyze, but also ADMAS virtual prototype software using the finite element model for solving the load size. Through research and practice in this issue shows that the finite element analysis and synthesis using a variety of software research and development of new products is an efficient way to significantly reduce new product development cycles, reduced development costs of new products, make the design out products in a leading position in the industry.