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Power Transmission from Rigid and Resonant Source Via Isolators to Resonant and Nonresonant Structures

机译：从刚性和谐振源通过隔离器到谐振和非谐振结构的功率传输

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摘要

The parameters controlling power transmission from a vibrating machine to the seating structure, such as a ship hull via spring-like isolators are investigated. The machine source is modeled by a mass at low frequencies and by a heavily damped beam at higher frequencies. The seating is modeled by both a long finite beam and an infinite beam in both frequency regions. Predictions of frequency average power and peak power transmission are made, using frequency average data of the machine source and seating properties. The theoretical work is verified by experimental measurements using a 50 cm aluminum bar damped with steel sheer and rubber adhesive coupled to a reciever beam by a rubber isolator. Maximum power transmission occurs between the force and velocity source regions, at the resonance frequency of the coupled mass spring and semi-infinite beam. When the finite beam is a source structure, the transition from rigid body to flexural beam-like behavior occurs when the magnitude of the rigid beam mobility becomes comparible with the real component of mobility of the beam due to flexural motion.

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