Abstract
The force applied to foundation from the anti-vibration device by the metal spring increases by resonance when the frequency of exciting force at starting passes through characteristic frequency. There is anti-vibration device with Visco Elastic Material to solve this problem. I studied the transmissibility when I used anti-vibration device with Visco Elastic Material for gas engine heat pump. A conclusion is that we can decrease half of the force applied to foundation at starting in the following only metal spring type.
