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http://dx.doi.org/10.21289/KSIC.2022.25.6.1155

A Study on the Seismic Isolated Bed System Considering the Seismic Stability of an Emergency Diesel Generator  

Ha, Neung-Gyo (Dept. of Mechanical Engineering, Changwon National Univ.)
Kim, Chae-Sil (Dept. of Mechanical Engineering, Changwon National Univ.)
Publication Information
Journal of the Korean Society of Industry Convergence / v.25, no.6_3, 2022 , pp. 1155-1163 More about this Journal
Abstract
This study proposes a technology to ensure the seismic stability of a 1,000 kW diesel engine-type emergency generator by applying a seismic isolated bed system. The technology allows the static analysis by making the first natural frequency of the installed entire emergency generator larger than the earthquake cutoff frequency of 33 Hz. First a three dimensional model for the generator was made with simplification for mode analysis. A new bed system with springs, shock absorbers, stoppers was then devised. Next, The mode analysis for the finite element model equipped by the bed system was performed. the 1st natural frequency above 33 Hz, the seismic safety cutoff frequency, was calculated to be 152.92 Hz. Finally, based on the seismic stability theory, the von-Mises equivalent stresses derived by structural analysis under the Upset and Faulted conditions were 0.01603 Mpa, and 32.06 Mpa, respectively. so seismic stability was confirmed.
Keywords
Mode Analysis; Seismic Stability; Emergency Generator;
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