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16 June 1998 Isolation design for systems with a flexible base and equipment
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Current literature has not fully explored the choice of isolator mount frequency or isolator placement for flexible systems. It is commonly suggested that isolators should be designed with a low-mount frequency. It is shown that these isolators tend to perform best in an overall sense; however, mount frequencies designed between system modes tend to have a coupling effect. That is, the lower frequencies have such a strong interaction between each other that when isolator damping is present, multiple system modes are attenuated. Also, for low-mount frequency designs, the first natural frequency can shift as much as 15.6%. For a mid-mount frequency design, the shift of the first three modes can be as high as 34.9%, 26.6%, and 11.3%, respectively. Also, when the base and system are flexible, isolator placement becomes a critical issue. There can be as much as 16% difference in the first mode for low-frequency mount design and as high as 25% for a mid-frequency mount design.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dino Sciulli and Daniel J. Inman "Isolation design for systems with a flexible base and equipment", Proc. SPIE 3327, Smart Structures and Materials 1998: Passive Damping and Isolation, (16 June 1998);

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