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In shipping and aircraft engineering, the vibrating motor or intrumentation is usuallymouned on a non-rigid base. To apply isolation design effectively it is necessary to investigate thenature vibration characteristics of the rigid motor, flexible base coupled system. A universal dynamicexpress for the coupled system is derived. A PC-based measurement solution is presented. And thesystem’s dynamic behavior is then investigated numerically and experimentally. The results show thata strong interaction will exist between the motor’s rigid mode and the flexible base’s mode when themotor’s mounting frequency is close to the flexible base’s first natural frequency. The first naturalfrequency of the coupled system is generally lower than the metor’s rigid mode frequency. At highfrequency, the fiexible base’s modes are the dominant modes of the coupled system.
In shipping and aircraft engineering, the vibrating motor or intrumentation is usually mouned on a non-rigid base. A universal dynamicexpress for the coupled system And thesystem’s dynamic behavior is then investigated numerically and experimentally. The results show thata strong interaction will exist between the motor’s rigid mode and the flexible base’s mode when theyotor’s mounting frequency is close to the flexible The first natural frequency of the coupled system is generally lower than the metor’s rigid mode frequency. At high frequency, the fiexible base’s modes are the dominant modes of the coupled system.