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申龜秀,李祺形,朴泰圓,鄭寅聖 全北大學校 1996 論文集 Vol.42 No.-
In this paper, a theoretical optimization approach is presented in order to consider natural frequencies for vibration transmitted to the fuselage. Also, this paper describes methods for reduction of structural vibration by the optimal placement of masses for formal mathematical optomization techniques. An optimization procedure is developed which employs the tuning masses and corresponding locations as design valiables which are systematically changed to achieve low values of shear without a large mass penalty. Three optimazation strategies are developed and tested. The first is based on minimizing the modal shaping parameter which indirectly reduce the modal shear amplitudes corresponding to each harmonic of airload. The second strategy reduces these amplitudes directly and the third strategy reduces the shear as a function of time during a revolution of the blade.