Power flow in the coupled dynamic system of machinery and building floor

摘要

The transmision mechanism of vibrational power flow in the complex flekible coupled system of machinery mouned on a multi-storey plant building via isolators are studied in this paper from the viewpoint of energy. In view of practical isolation designs in engineering,an asymmetric isolation system with mtiltiple isolators on a fiekible foundation is modeled, in which the interactions between the machine and the floor, and among different mouating points are taken illto account. Moreover, the transmission characteristics of power flow in the system concerned are analyzed with the use of subsystem mobility synthetic techaique. Further more,the power flow spectra of the asymmetric system are calculated and compared with those of symmetric one to reveal the effects of asymmetricity and system parameters on the power flow.Finally, new approaches to the control of structural vibration and acoustics for this kin of problems are proposed.