1991-05-01

Experimental Analysis of Power Plant Vibrations by Shaker Test 911069

ABSTBACTThe purpose of this study is to develop a shaker teat method for analyzing and evaluating the dynamic characteristics of the total power plant vibration system more rapidly and precisely than the conventional engine running test.A power plant is excited at the connecting rods of both end cylinders, lubricating crank journals and crankpins. The shaker test was proved effective by comparing it with the engine running test. The results of both tests are equivalent in resonant frequency, mode shape, and vibration control effect.Furthermore, the multiple input burst random excitation was put into practical use for improving the reciprocity and coherence, and for reducing the measurement time. Based on this study, we have developed a power plant system with greatly reduced vibration amplitude.

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