Rotating machine play an important role in modern technology. Compressors in
ventilating and cooling systems, pumps in power generation facilities, as well as high
speed computer are all examples of flexible rotating machinery that must remain functional
during and after a sever earthquake. Recent earthquakes have demonstrated that an
aseismically designed structure may perform well during a strong earthquake yet still
become nonfunctional due to damage in critical nonstructural components. For example,
evacuation of several hospitals during the recent Northridge earthquake in the LA area
was not caused by structural failure bur resulted from mechanical failure of the systems
described above. Rotating machines are key components of such system. Further study
into the behavior of these systems and technique for their protection for their protection
during severe ground motion is needed.
The flexible rotating machine is significantly complex, even for highly simplified
models, due to gyroscopic and other effects. This paper presents the coupled, linear partial
differential equations of motion of a flexible rotating shaft subjected to ground motion.
Classical and finite element methods are developed to solve these equations. The effects of
various physical parameters on the response of the system; magnitude, duration, and
frequency content of the ground motion; bearing stiffness and damping; flexibility of the
deformation and rotatory inertia effects are investigated, Both vertical and horizontal
ground motion, individually and in combination, will be considered. / Graduation date: 1995
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/35559 |
| Date | 30 November 1994 |
| Creators | Su, Wen-Chyi |
| Contributors | Hernried, Alan G. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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