| 摘要 |
A vibratory counterforce system for counterbalancing vibratory forces of constant frequency acting in a plane comprises at least one planar omnidirectional dynamic absorber, i.e. an auxiliary mass vibratory system, the natural frequency of which is substantially independent of the direction of vibration in the plane. When used in sets of two or more, and located at spaced apart points on a structure subject to vibratory forces of constant frequency, the absorbers act to minimize the vibration at their points of attachment and respond, both to translatory forces and to force couples. The absorbers or counterforce units are particularly useful when applied to the base of a vibratory conveyor because they can effectively counterbalance the vibratory forces applied to the base which vary both in amplitude and direction according to the load on the conveyor. |
