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Experimental Verification of Effectiveness of Magnetorheologi-cal Fluid Damper fixed to an Elevator in Case of Earthquake.

In countries where the economy is growing rapidly, many skyscrapers are being built one after another. For such skyscrapers, highspeed and safe elevators are essential as transportation means. Therefore, we have proposed an elevator with magnetorheological fluid (i.e., MRF) dampers to improve the safety of passengers ([1]). For supplying safe elevators, we have to consider various dangerous factors, such as natural disasters, accidents and so on. If a disastrous earthquake occurs, an elevator works an earthquake-sensing system and stops at a nearest floor to evacuate the passengers. However, in reality, it often happens that passengers are shut into the elevator for a few minutes or more. During the earthquake, the passengers feel fear or may be conscious of death. In this paper, we would like to verify whether the proposed MRF damper can absorb strong vibrations of elevator caused by an earthquake, and would like to confirm the effectiveness of MRF damper by using our experimental simulator.