Lightweight Design of a Certain Type of Dump Truck Frame

With the rapid growth of China's economic strength, the demand and market share are also constantly increasing. The number of cars is rapidly increasing, and a large amount of fuel is consumed as a result. The massive release of vehicle exhaust seriously damages the natural environment, and the environmental crisis is becoming increasingly serious. This article follows the principles of improving fuel efficiency, reducing emissions, and enhancing vehicle performance. Using NX 12.0 software, a three-dimensional model of a certain type of dump truck frame is constructed based on actual parameters. ANSYS Workbench is used to simplify the geometric model, mesh division, and material definition, and a finite element model is constructed. Obtain the structural performance and natural vibration characteristics of the original chassis under four typical working conditions: bending, torsion, lifting, and unloading, through static analysis and modal analysis. On this basis, the dimensions of the components that bear less load on the original frame were optimized, and the topology of the second crossbeam and rear end corner of the subframe that bear less load on the original frame was optimized to obtain a new frame. The new frame of the dump truck underwent secondary static analysis and modal analysis, and it was found that the weight of the new frame decreased by 41.03 kg, successfully reducing the weight of the frame by 4.38%, improving the vehicle's handling and stability, and extending its service life.