Based Ride Comfort Bonded All Terrain Theory

In recent years, with the need of domestic economic development, theproportion of all terrain crane in engineering applications is becoming biggerand bigger, and as the key component of all terrain crane chassis, the goodperformance of oil and gas spring suspension has becomes the main factor,which influence the riding comfort and handling stability of vehicle. So, thereasonable designed oil and gas spring suspension system has the vitalsignificance to improve riding comfort and cross-country performance of allterrain crane.In this paper, a certain type of nine shaft domestic all terrain crane wasconsidered as the research object, and the structure component、characteristicsand working principle of the hydraulic of oil and gas spring suspension systemwas deduced and summarized; and stiffness、damping and amplitude frequencycharacteristics of oil and gas spring was deduced, the corresponding mathformula was received, the main factors which influence its characteristics wasdiscussed, and the impact trend among the main factors was also discussed. Forthe convenient application in engineering design, linearization method wascarried out; according to the character of oil and gas spring, the two degrees offreedom vehicle vibration model of single suspension cylinder and four degreesof freedom vehicle vibration model of single axle were established respectively.According to the power bond graph theory, the bond graph was set up, thencorresponding state system of differential equations was deduced, and thesimulation modules of the two vibration models were established inMatlab/Simulink software.For the simulation analysis, the influence of oil and gas spring suspensioncylinder’s main structural parameters on performance of two degrees of freedomvehicle vibration was analyzed firstly, and the optimal parameter values whendamping effect of vibration reduction is best were confirmed. Then underunilateral incentives and turn conditions, for the stand-alone type oil and gasspring suspension and the interconnection type oil and gas spring suspension,the body roll angle、body acceleration and suspension dynamic schedule of four degrees of freedom vehicle vibration model were contrastively analyzed. Theresults show that for the riding comfort and handling stability of all terrain crane,the interconnection type oil and gas spring suspension has better performancethan the stand-alone type oil and gas spring suspension.