Dynamic Analysis of the Traction Elevator System with Finite Element Method
|School||South China University of Technology|
|Keywords||Traction Elevator System Dynamic Performance Vibration Reduction Modal Analysis Transient Response Analysis|
The elevator vibration which is one of the most crucial and difficult problem affects the elevator’s comfortableness. The most direct and effective way is to research the dynamic performance of the elevator system to understand and solve the vibration problem. This thesis is based on the project of“The SolidWorks Implementation of Hitachi Elevator (China) Co., LTD”held by Guangzhou CASS Software Co., LTD and Guangdong Hitachi Elevator (China) Co., LTD. With searching the vibration reduction plan to up to the comfortableness purpose, dynamic performance of the traction elevator has been studied with digital modeling, simulaiton and visualized analysis. Specific contents and conclusions are as follows:1、The dynamic design based on FEM method is put forward to the research of the elevator system. Deduced the calculation method of the dynamics of modal analysis and the transient response analysis. Pointed out that dynamic design is an active and positive method which takes suppressing the vibration into account during the course of design . The finite element method is becoming the important basic theory and the powerful tool in both dynamic design and dynamic analysis.2、The single wrapped elevator of 2:1 ratio traction finite element model is established based on 3D modeling software SolidWorks so that the stability ,correctness and versatility has been ensured. The skeleton pattern has been choosed to ensure the accuracy and the stability of the assembly, which realized the rapidity and convenience of the physical ortotype.3、Because that the quality of guide rail direct impact on the elevator running steadiness, the bending deformation correction analysis is proposed to T-shaped guide rail. The results of simulation revealed that the max deformation deflection is 4.64mm and 1×10?16mm after unloading, which is within the rang of the straightness threshold for GB/T 22562—2008.4、According to the variable stiffness of the rope and its mechanics is hard to simulate, the dynamic stress of side car rope is analyzed under the rigid and elastic conditions, from which calculates the dynamic stress curve of the steel rope when car rising. 5、Based on the FEM technology, the traction elevator system of the finite element model is established and then simulation. Calculating the results of the modal analysis and transient response analysis respectively, varied by time in the whole stage of start-up, running and brake is obtained under three typical conditions: non-load, half-load, full-load. This thesis has got not only the relationship between the former 7 natural frequency and the load , the position of the car, but also the car’s dynamic response values and trend of change under the guide Sine excitation, which reveals the elevator system parameters on the elevator vibration.6、Plans have been proposed according to the simulation results, which avoid the resonance with the human body sensitive frequency. To achieve the purpose of vibration reduction by adjusting the parameters and adding the elastic components, which is demonstrated the effectiveness by simulation after optimizing.