RESILIENT MOUNTING FOR RECIPROCATING AND ROTATING MACHINERY
Annual engineering rept. no. 2, 15 Jun 1949-14 Jun 1950
ILLINOIS INST OF TECH CHICAGO DEPT OF MECHANICAL ENGINEERING
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A test procedure was developed to determine the static and dynamic characteristics of resilient mountings, forty-six of which were tested completely. From the data obtained at resonance, the dynamic stiffness, and damping ratio of each mounting were determined. The static stiffness and set were determined from static tests. The transmissibility of each mount was measured over the frequency range of approximately 2 to 10,000 cps. Values of the damping ratio and the ratio of dynamic to static stiffness were determined and found to be within the range of values determined by other observers for the same materials. The test results are given in tabular and graphical form and all the pertinent data obtained are included in each form. The test results indicated deviations from vibration isolation theory in that at certain high frequencies within the audio-frequency range some isolators do not give the degree of isolation expected and may even act as amplifiers. The metal spring types exhibited this phenomenon to a marked degree.
- Machinery and Tools