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Huo Rui
College of Mechanical
Engineering,
Shandong University,
Jinan 250061, China
Shi Yin
College of Power Engineering,
Naval University of Engineering,
Wuhan 430033, China |
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EQUIVALENT EXCITATION METHOD
FOR VIBRATION
ISOLATION DESIGN:
THEORETICAL ANALYSIS
AND EXPERIMENTAL RESULTS*
Abstract: In view of difficulties concerned with direct measurement of excitations inside source equipments and their significant influence on vibration isolation effectiveness, a dynamical model, for vibration isolation of a rigid machine with six-degree-of-freedom mounted on a flexible foundation through multiple mounts, is analyzed, in which the complicated and multiple disturbances inside the machine are described as an equivalent excitation spectrum. And a method for the estimation of the equivalent excitation spectrum according to system dynamic responses is discussed for the quantitative prediction of isolation effectiveness. Both theoretical analysis and experimental results are demonstrated. Further work shows the quantitative pre-diction of transmitted power flow in a flexible vibration isolation experiment system using the proposed equivalent excitation spectrum method, by comparison with its testing results.
Key words:
Vibration isolation Excitation spectrum Effectiveness estimation |