The Study Of Structure Analysis And Test For Super_heavy Road Wrecker

Traffic accident, failure vehicles and illegal parking is unavoidable when thevehicle is traveling on the road, it has higher probability of this phenomenonoccurred, especially on the highway and the bustling downtown area, because it hasspeed faster, more vehicles. Road wrecker role is to make the roads open, the failurevehicles is towed away in time when an accident occurs to ensure the normalcapacity of the road.At the moment, the finite element method has been widely used, but complexstructure (turntable, sub-frame, and so on) for the wrecker only can rough estimatesrely on simplified model, it is difficult to reflect some local real stress conditions,This leads to unclear to structural analysis and products there is a lot of securityrisks and leads to the occurrence of the accident. In addition, the weight of thevehicle will directly affect the manufacturer’s production costs and user costs, thusaffect the market competitiveness of the products, so whether it is from the roadwrecker’s manufacturer, or from the user’s point of view to consider, structuralanalysis and optimization of in-depth studies have been imperative on the roadwrecker.First, the article describes the current situations of the domestic andinternational about development of the road wrecker, road wrecker future trends, andto clarify the theoretical and practical significance of the road wrecker by usingfinite element analysis.Secondly, the finite element model of the road wrecker is got by dealing withwrecker geometric model provided by Enterprise. After the models of all parts areestablished, each of them is assembled by using the APDL language of ANSYS andselects a suitable position to impose constraints and the loads. After this, the batchcalculation program is compiled by DOS command. By using the program canachieve the automatic calculation of multiple working conditions and effectivelyreduce the computation time and processing time of results. Once again, by analyzing the result of boom strength by calling AYSYSsoftware determine improving the area on the boom. Then assembled the turntableand frame through a simplified finite element model of the slewing ring, this methodcan effectively avoid the frame’s loaded inaccurate and reflect of the connection’sstress between turntable and frame. According to the result extracted by thecalculation develop an improvement program of frame structure and analysisimproved results.Finally, the stress test is to be conducted on the boom of road wrecker byapplication DH5908which is a test system of dynamic and wireless in order toverify the correctness of the finite element model and calculation results. In addition,the combination of ANSYS optimization module, an optimization method isillustrated based on ANSYS software to the wrecker’s turntable. This method can beoptimized on the vehicle and achieve reduction of vehicle’s weight, thereby savingthe cost of production and enhance market competitiveness of product.In this paper, by using HyperMesh and ANSYS combination to deal withpractical problems, and achieve parameterized assembly and multi-conditioncalculation by using APDL language. In addition, this paper also proposed a methodof weight of loss optimization based on ANSYS optimization module. These are areference for future similar road wrecker structural design and calculation.