基于Modelica的裝載機(jī)工作裝置仿真研究
[Abstract]:The large volume, heavy weight and high development cost of loader have always been the main factors restricting its development. Using computer modeling and simulation instead of physical experiment can reduce the development cost, which has become an important technology for the rapid development of loaders. In recent years, the application of computer simulation technology to loader more and more, but there are still two problems in the simulation of working device: 1, the objective of simulation optimization is relatively single, it is difficult to carry out multi-disciplinary simulation optimization; 2. It is difficult to carry out simulation optimization in a unified environment by using multiple software for joint optimization through interface. Based on the Modelica modeling language, the multidisciplinary simulation model of the working device can be established, and the simulation analysis can be carried out by using the Dymola software, so as to realize the joint simulation of the working device, such as machinery and hydraulic pressure, and so on. It plays an important role in the design and simulation optimization of loader working device. The main work of this paper is as follows: (1) the development, structure and design elements of loader working device are introduced, the whole frame of the paper is put forward, and the working device of loader is preliminarily understood. (2) aiming at the whole frame of the paper, This paper briefly introduces the Modelica language, Dymola simulation software and possible retraction phenomenon under unloading condition, which is necessary for multi-disciplinary modeling and simulation in this paper. 3 the basic principles of hydraulic system and mechanical system are introduced, and the basic principles of hydraulic system and mechanical system are introduced, and the basic principles of hydraulic system and mechanical system are introduced. It provides a theoretical basis for the modeling of mechanical system and hydraulic system of loader working device. Then using Modelica language and Dymola platform, and based on the basic principle of hydraulic system modeling and the basic principle of mechanical system modeling, the interface of hydraulic system and its basic components are modeled separately. The basic component model is used to model the mechanical system and hydraulic system of the loader working device, which lays the foundation for the simulation of the working device of the subsequent loader. (4) using the established mechanical and hydraulic system models, The whole simulation model of the loader working device is set up, the different working conditions of the loader working device are simulated, and the pressure, velocity and flow rate of the two hydraulic cylinders are compared and analyzed. 5. 5 the working device of the loader under the unloading condition is analyzed emphatically. In this paper, a simulation optimization is carried out for the possible retraction phenomenon at the limit unloading position of the moving arm cylinder and the rotary bucket cylinder under the force condition of the moving arm cylinder and the rotary bucket cylinder.
【學(xué)位授予單位】:杭州電子科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TU623.9
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