Research On The Dynamic Simulation Of High-speed Elevator Systems Based On Virtual Prototype Technology

With the acceleration of the urbanization process, the improvement of people's living conditions and the increase of high-rise buildings in China, the high-speed elevators have played an more and more important role in citizen'life. The functionality, security and comfortableness are the three essential factors which affect an elevator quality and the vibration of an elevator is the most primary factor which affects its comfortableness. At present, the elevator technology in the fields of functionality and security etc have already become more perfect day by day, but the comfortableness demands become the bottleneck that restrains the development of elevators at home and abroad. For a long time, the design method of elevators is static design, and the dynamic simulation research is limited to some parts or functions of an elevator, but it has not been applied to the high-speed elevator system.This thesis is based on the project of"The research of 4.0m/s high-speed elevator"held by Guangdong Tairi Elevator Limited Company. Based on the status quo of the high-speed elevator[0]s'structural design and dynamical simulation research, the thesis introduces the analytical hierarchical process and the virtual prototype technology into the design and analysis of high-speed elevator system, thus provides a means of visualization of the design process of elevators. The main contributions of the thesis are summarized as follows:1.Aimed at the problem that the lift well is too narrow in the project so that it is difficult to make a layout for the elevator system and in order to get the optimization of the structure design shafts and the spatial distribution of high-speed elevator system, both the analytical hierarchical process and the fuzzy preference process are applied to evaluate the design scheme of the high-speed elevator system, in this way, the angle of the car frame and the car platform sill is fixed on 45 degrees.2.Aimed at the problem that the parts of high-speed elevator system is numerous, moreover, the car platform sill and the car frame are non-standard structural elements, this thesis uses three-dimensional design software Pro/E substituting for two-dimension software AutoCAD to build the three-dimensional model and the two-dimensional drawings, thus it can ensures that the parameterizations of complex parts are stable, accurate and universal and make the process of building physical model fast and easy.3.Aimed at the problem that the steel rope is of variable stiffness and the dynamical performance is difficult to be simulated, this thesis studies the method of building steel rope with the bushing in ADAMS software. The method simulates the dynamical performance of the steel rope by separating a rope into lots of cylinders and adding bushing force between each adjacentinter cylinder.4.Aimed at the technique of virtual prototype and the platform of software of ADAMS, this thesis exports parts of the models of high-speed elevator system created in the three-dimensional software Pro/E to the software of ADAMS by the software of MECH/Pro and then assembles the models of steel ropes to the elevator system, finally the corresponding restrictions and load are imposed on various respective components, thus the virtual prototype model of high-speed elevator system is established.5.The dynamic model and analysis methods of high-speed elevator system are established, and the optimization techniques of dynamics parameters are studied systematically by combining theoretical analysis and computer simulation. By making simulation studying of the horizontal vibration and vertical vibration of the virtual prototype, the thesis achieves the dynamic characteristics of high-speed elevator system during its accelerated motion, constant velocity motion and decelerated motion, which can provide a basis for the design of the high-speed elevator complete machine system.Analytical results indicate that the virtual prototyping model and the simulation parameters are reasonable in this thesis. The simulation result accords with the practice approximately, which reflects the dynamical characteristics of high-speed elevator system truly. The research provides a useful way of the analysis and design for high-speed elevator complete machine systems.