Research On Seismic Response Analysis Of Counterweight-Rail System In Elevator

The continuous development of science and the overcome of the technology are refreshing the height record of buildings and the elevator is a contact equipment between people and buildings. It's like a fast car, this make us commute between the ground the sky. So, no fast elevator, no high-buildings. Not only in the ordinary circumstances, we should maintain the safety of the elevator, such as unexpected power outages, unexpected signal interruption, etc. We should also consider the safety of the elevator when the earthquake emergencies. Because the earthquake are likely to cause the people in the elevator face great danger, especially the derailment of the counterweight will cause the people inside almost doomed. In addition to these, the hit between the derailment counterweight and the lift car will bring the secondary injuries. In fact, all of the damage category statistics show that the largest proportion is the weight's derailment, which accounted for more than 50% in all damage forms.Before the seismic design, the dynamic analysis of elevator system is first, through this we can get each subsystem components'status in the earthquake, then judge its anti-seismic property. Numerical simulation and experiment are two important means to study the dynamics today. Experiment is undoubtedly more effective, it can obtain the objective and effective data, but the particularity of the elevator is that it has a complex assembly equipment, so full-scale vibration experiment is difficult to realize and scale model is also not easy to achieve.In order to study the dynamic response rules of counterweight-rail system when the earthquake, we make a vibration experiment and ANSYS FEM simulation on a full scale model with counterweight-rail system. In the ANSYS FEM simulation, COMBIN40 is used to represent the Kelvin model and simulate the contact force. The simulation results are in good agreement with test data, which verify the correctness of the finite element model and the applicability of the Kelvin model. According to the experimental research and numerical simulation we can get the following conclusions:the strain response of guide-rail is bigger than that of bracket; the strain response of guide-rail's venter is bigger than that of guide-rail's flange, the strain response of guide-rail in the upper guide shoes is bigger than others; the contact force and relative displacement between guide-rail and upper guide shoes are bigger than those in the lower guide shoes. When the same direction and the same amplitude earthquake excitation, the dynamic response of the rail with keeping devices is smaller than the rail without, and the keeping device homogenize the dynamic response, all these can effectively prevent the derailment of the counter-weight when the earthquake.