Study And Application On Multi-directional Coupling Vibration Modeling And Design Of Vibration Reduction Of High-speed Elevator Traction System

With the emergence of high-rise buildings, the demand of high-speed elevator and the requirement for safety and comfort of the elevator increase. Combining with the technical problems during designing a high-speed elevator traction system, a dynamic model of the elevator traction system that considering flexible features is builded. The dynamic model is solved by Gauss precise integration. Basing on these the dynamics and laws of the elevator traction system is studied. A useful control method is used to reduce the vibration of the elevator traction system, and a software is developed to design the high-speed elevator.Therefore, the study on dynamic behaviors for the traction system of elevator and the devrlopment of the software provides the theoretical and technical support for reducing the vibration of the elevator traction system.The main contents of this thesis are summarized as follews:In the first chapter, the domestic and international status of high-speed elevator is introduced. The research status of the key technologies, such as security design, comfort design and green design are reviewed. Combined with the background of research the significance and the content of the research are described, and the structure of the theis is introduced.In the second chapter, the structure and movement of high-speed elevator traction system are studied, the elevator traction system is simplified as an axail stretching string with mass-springer-damping system. A mathmetical model of the elevator traction system is builded by the energy method and the Hamilton’s law. In the last, a dynamics model of KLK2 high-speed is bulided as a example.In the third chapter, a method that using Gauss precise time-intergration to solve the dynamic model is processed. The dynamic model of unlimited freedom is discreted, the it is sloved by Gauss precise time-intergration method. The curves of the acceleration is got by nearesting the numerical solution. At last, the the factors affecting the vibration of high-speed elevator traction system is analysised by using a factal elevator as aexample.In the fourth chapter, the methods and standards to evaluate the vibration of elevator traction system and the space of parameter optimization are studied. And a high-speed elevator traction system parameter optimization model is established. The method how to reduce the vibration of elevator traction system is studied.In the fifth chapter, a software which used to analysis the dynamics of the elevator traction system and design a high-speed elvator base on the theoretical basis studied in this thesis is developed. And the software is applied in real business projects to verify the feasibility and effectiveness of technologies and system memtioned above.The sixth chapter summarizes the main contents and results of this thesis, and gives further research work and derection in the future.