The Study Of Interference Problem Of Heavy Articulated Dump Truck

Heavy articulated dump truck(short for HADT) can provide excellent dynamicperformance, maneuverability and extensive road adaptability even in the badenvironment. It is especially suitable for the off-road transportation. As theconstruction projects of the Twelfth Five-Year plan are carrying out gradually andquickly, HADT becomes an important transport tool. Currently, foreign HADTproducts begin to enter the market of China, and domestic enterprises and universitieslike the XCMG and DongNan University also begin to research this kind of vehicle,but still in small batch production stage.The balanced suspension can keep the wheels contact with the ground in complexconditions, to improve the dynamic performance and the passing ability of the vehicle.The balanced suspension in this paper is rubber suspension, the rubber springs transmitvertical force between the frame and the axles, the guiding mechanism and PanhardRod are used to transmit the longitudinal and lateral force between the frame and theaxles, and to make the axles move relative to the frame according to certain track. Inthe small batch of real vehicle test process, the rubber springs shear failure happened,moreover, the joint of Panhard Rod and the frame fracture failure occurred. Afteranalyzing, the form and the layout of the guiding mechanism and Panhard Rod wasthought to have great influence on the balanced suspension components’ force. Thekinematic and dynamic analysis of the balanced suspension is essential to design thebalanced suspension reasonably, and to reduce the mechanism interference.Based on the real vehicle’s parameters, the paper has established the3D digitalmodel, the kinematic and dynamic model of HADT. The kinematic sketch of thebalanced suspension was established through the hypothesis and simplification. Therelative motion equations of the balanced suspension’s main components were deduced,and the relative movement law of the balanced suspension’s main components wasanalyzed, to obtain the conditions which can avoid or reduce the interference.The software ADAMS was used to establish the virtual prototyping model of heavyarticulated dump truck’s rear body, and to find the dynamic characteristic of thebalanced suspension by the four post rig simulation, and to obtain the force curve ofthe Panhard Rod under the three incentive conditions of pitch, roll and warp, whichacted on the four wheels of the middle and rear axle. The influence of Panhard Rod’sdynamic characteristics from different guiding mechanism forms and differentlongitudinal rods’ angles was analyzed under the index of the RMS of Panhard Rod’saxial force in different models.According to the kinematic and dynamic analysis of the balanced suspension, thebalanced suspension’s main components’ forms have been selected, and the structuralparameters and the layout of the guiding mechanism and Panhard Rod have beenoptimized. A theoretical guidance can be provided for the selection and design ofHADT’s balanced suspension.