This damping device has overcome the shortcoming, that the arbitrarily low values of stiffness and natural frequency in general damping devices, made of the elastic component with positive stiffness, can not be achieved easily. The principle of compensating of the positive and negative stiffness each other is used in the device. As the two kind of elastic components with respectively positive and negative stiffnesses are parallelly used in the device, its stiffness can reach arbitrararily low value, and the large regulation of rated load capacity of damping device can be realized by regulating the predeforming value of elastic components with respectively positive and negative stiffnesses, so that the effective measures can be provided for damping, especially for low frequency damping and super-low frequency damping. |