Structural Optimization And Reliability Design Of The Large-Scale Wide Paver With Crawler

In the construction process of high grade highway and highway, the traditional paver's problems of "injustice" and "segregation" has influenced the quality of the road and life of the pavement. To solve these problems, the new large-width, high-power, high-precision, high efficiency, anti-segregation paver has been the focus of paver industry research and development in recent years at home and abroad. Due to the weak technological base, China's high-end large paver market is monopolized by the international well-known brand currently.Based on the above background, some paver structure improvement scheme is put forward and some correlation reliability analysis is made by design ideas combining dynamics and static mechanical properties, from point of view of vibration and noise reduction to enhance its reliability. This paper is carried on in order to provide some reference and theoretical support of structure optimization and reliability design for the design and produce of internal large domestic paver, and to enrich the theory of domestic production and design of paver industry. And the paper is completed relying on Jiangsu Science and Technology Support Program. The paper's specific work includes the following several parts:1. The large paver frame finite element model is established, and the modal simulation analysis is carried out to get the main mode shapes and natural frequencies; and the model is verified to be correct through the frame mode experiment.2. Integrated structure design method with dynamic stiffness as structure optimization's objective and static stiffness and strength as checking direction is proposed. The weak part of the frame stiffness is obtained by structure sensitivity analysis. By using the methods of size optimization and topology optimization on the basis of process design, structure parameter optimization is carried out through proposing optimization objective function. The given improvement scheme of the frame shows that the natural frequencies of the 1-and 2-order of the corresponding mode of the frame are improved obviously. The frame quality is reduced by 3%, and the static characteristics meet the design requirements.3. The vibration isolation performance of Isolator power-train is evaluated. Each isolator's stiffness optimization match is completed by using MATLAB software programming on basis of software analysis and hardware test in order to improve the decoupling rate of the vibration system. Finally, the viable power-train Isolators are obtained through the shape and size design.4. To evaluate the reliability, the whole system's dynamic and static performance and its fatigue life are analyzed by establishing whole paver's finite element model.