1141 axle heavy goods vehicles drive axle Lightweight Research

Heavy-duty truck axle load supporting vehicle is carrying the main power transmission components parts, also the load transfer to the wheels. Role in the car on the three forces that drive wheel braking force, traction and lateral force, it is also transmitted through the axle and the frame or body of the vehicle suspension. Car in motion the process will encounter all kinds of weather and road conditions, therefore, structural performance axle performance and service life of the vehicle has a direct influence. With the continuous development of human society, on the car ride and comfort of increasing demand, along with the increasingly serious energy shortages, making it increasingly high demand for lightweight vehicles. This makes the traditional design methods can not meet the requirements of modern automotive design. With the level of modern mathematics and its applications in engineering matures as a finite element method calculation increasingly common use of analytical tools, the emergence and development of computer-aided design to promote the technical level. The finite element method axle structure for performance analysis, consider the drive axle in the design optimization of shell structure, to improve the vehicle's various properties, to reduce axle weight, lower manufacturing costs and so has great significance. This paper focuses on broadly include the following: a model with the actual model of the drive axle housing, and the current energy crisis, the evolving requirements of lightweight design, made of lightweight drive axle housing to the research goal, the finite element line static analysis, modal analysis and the freedom of the mechanical structure optimization design theory, the CAD software CATIA and finite element analysis software HYPERMESH combination, the first drive axle in the original structure and conditions of use to combine the theory of three-dimensional modeling study subjects a certain degree of simplification, CATIA axle complete three-dimensional simplified model, and then create a good three-dimensional model into HYPERMESH analysis software, were HYPERMESH finite element model and analysis of the whole process, obtained drive axle housing conditions in the four typical results of the integrated deformation and stress distribution and its constraints in the free state of the first 6 natural frequencies and mode shapes, by combining the above results when the actual axle allowable stress and pavement materials excitation frequency, certified to meet the design requirements for the bridge case, you can think it requires a variety of driving conditions is a reliable and will not cause resonance. Finally HYPERMESH optimization module structure of its thickness optimization, the results showed that the axle housing quality has been significantly reduced, the maximum stress and allowable stress is more close to practical application has a good meaning. 

Keywords: drive axle housing; HYPERMESH; static analysis; modal analysis; structure optimization