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One of the main components of the box telescopic boom aerial vehicles or equipment truck crane , construction machinery products range , the quality and the forces affecting the performance of vehicle use . The boom between relying on contact with the slider transfer loads , the contact at the Boom danger zone . The project , the node DOF coupling technique to simulate the role of the contact of the slider telescopic boom box , the calculation results of the stress concentration . This article through contact analysis to calculate the force between the slider and jib , the actual role of the state , and the results are used to guide the actual engineering design . First , the analysis of the actual role of the state of the contact at the box - type telescopic arm slider , comparing the advantages and disadvantages of various contact algorithms , mathematical analysis model to establish contact at the box telescopic arm slider . Secondly, the the ANSYS software platform , the big boom aerial vehicles irregular quadrilateral cross-section as the research object , using the contact element , the slider and the inner section in the foreign section box type telescopic boom box , telescopic arm slider to establish contact on - surface contact relationship between the analog slider with telescopic boom box : mesh mapping method , applying the appropriate boundary conditions and load step , select the appropriate contact parameters spreadsheet , set reasonable contact area ; to establish telescopic boom box lap part of the finite element model . Then , the research box telescopic boom lap at different simplified way , using five different simplified methods to simulate the box telescopic arm slider contact , the linear analysis of the calculation results with the contact nonlinear analysis compared , come nearest equivalent linear simplify . Finally, the analysis of the two typical operating conditions, the upper and lower slider length dimension change of the arrangement position and the upper and lower slider , the maximum stress of the box - type telescopic arm , the arm head maximum displacement , the contact pressure and penetrating effects of tolerances law , the slider to the arrangement position on the cross-sectional and length dimensions designed to provide a certain basis .
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