A NEW TYPE OF INERTIAL VIBRATION TRANSDUCER WITH LOW FREQUENCY RANGE AND LARGE AMPLITUDE

摘要

This article presents a new type of intertribal vibration transducer that is suitable for the vibration modal test of large scale structures, such as high buildings, heavy ship and so on. The design of the transducer structure is able to remove the restoring force of the inertial component, so that the intrinsic frequency of the transducer can be removed and its low frequency limit tends to be zero. The circulating motion of the inertial component makes the vibration amplitude measured be not limited. The new type transducer is of advantages being small in structure and low cost. With application of reactive excitation method of Rocket Motors developed by author, the new type transducer has been successfully used for the vibration modal tests of large scale structures.