Structural Analysis On Steering Linkage Of Five-axis Heavy Vehicle

With the infrastructure and engineering construction's needs, a number of high-power, high-load carrying capacity of heavy vehicles has been widely used. As heavy vehicles usually have a long body, due to restrictions on work sites and roads, asking them to turn radius controlled in a certain range, so heavy vehicles used more multi-axis steering technology, and the performance of its steering behavior restricts the development of its own to some extent. For muti-axis heavy vehicle, they have a few more steering axle, and its tire wear and steering linkage damage usually happens in actual process. In order to make a better steering behavior, reduce tire wear and steering linkage damage, it is necessary to do further study on Muti-axis Steering technology. This paper was based on ADAMS/View software platform, to one company's QAY130 all terrain crane as the prototype, using multi-body system dynamics and virtual Prototype theory to do structural dynamic analysis on Steering Linkage. The paper mainly includes the following contents:(1) The paper did Kinematic analysis of spatial for the Multi-axis steering mechanism of heavy vehicles, and established the plane and space mathematical model of Steering Linkage. Finally analyzed and evaluated multi-axis turning and steering performance.(2) The paper introduces to make the various parts of the simulation model about the all-terrain crane steering system, and divided steering system into several sub-systems, each subsystem model are established in the modeling and made parametric part of some variable at the same time. Finally got a virtual prototype model of five-axis all terrain crane steering system, and this system included the Ackerman steering, steering linkage, tires, hydraulic cylinders, suspension systems etc. A flexible steering rod MNF file was got by Ansys software, According to import it into ADAMS model of multi-axis steering system, finally got the establishment of a steering flexible coupling simulation models.(3) The paper studied deviation of inner and outer deflection angle and the force changes of main linkage through the flexible coupling analysis.(4) Based on the model flexible coupling, the paper did optimal design for the steering linkage and steering trapezium by using of ADAMS optimal design features, and this study provides a theoretical method for the later research design.(5) The paper estimated the fatigue life of the second and third Steering Linkage by fatigue analysis software MSC.Fatigue, and identified the location of the more concentrated stress distribution and more vulnerable to fatigue of the place, this provided reference for the structural design.