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상판 위 질량의 순간적인 움직임에 의해 가진되는 6-자유도 공압제진대의 진동 응답에 대한 연구
선종오(Sun, Jong-Oh),신윤호(Shin, Yun-Ho),김광준(Kim, Kwang-Joon) 한국소음진동공학회 2007 한국소음진동공학회 논문집 Vol.17 No.6
As environmental vibration requirements on precision equipments get more stringent, use of pneumatic vibration isolators becomes more crucial and, hence, their dynamic performance needs to be further improved. Dynamic behavior of those pneumatic vibration Isolation tables is very important to both manufacturer and customer as performance specifications. Together with conventional transmissibility, transient response characteristics are another critical performance index especially when movements of components, e.g., x-y tables, of the precision equipments are very dynamic. In this paper, analysis on transient response of a pneumatic vibration isolation table loaded by a mass moving on it is presented. This is a conventional dynamics problem on a rigid body with 6 degree of freedom and a mass with another degree of freedom. How to obtain transient responses of the isolation table is described when the movements of the mass are prescribed relative to the table.
김상헌,김경호,선종오,조영갑,정택형,김정현,이관희,Kim, Sanghaun,Kim, Gyeong-Ho,Sun, Jong-Oh,Cho, Yeong-Garp,Jung, Taeck-Hyung,Kim, Jung-Hyun,Lee, Kwan-Hee 한국압력기기공학회 2016 한국압력기기공학회 논문집 Vol.12 No.1
The Second Shutdown Drive Mechanism (SSDM) provides an alternate and independent means of reactor shutdown. The Second Shutdown Rods (SSRs) of SSDMs are poised at the top of the core by the hydraulic force driven from a hydraulic system during normal operation. The rods drop by gravity when a trip is commended by a Reactor Protection System, Alternate Protection System, Automatic Seismic Trip System or operator by means of power off solenoid valves of hydraulic system. This paper describes the test results of seismic qualification of a prototype SSDM hydraulic system to demonstrate that its structural integrity and operability (functionality) are maintained during and after seismic excitations, that is, an adequacy of the SSDM design. From the results, this paper shows that the SSDM hydraulic system satisfies all its design requirements without any malfunctions during and after seismic excitations.
이지훈(Jihoon Lee),선종오(Jong-Oh Sun),김경호(Gyeongho Kim),유연식(Yeon-Sik Yoo) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
The objective of this research is to calculate the reaction forces of anchor bolts and embedment plate of reactor assembly for KIJANG Research Reactor (KJRR) due to seismic excitations. The reaction forces of anchor bolts and embedment plate of reactor assembly were determined by utilizing modal analysis and response spectrum analysis. The seismic excitations for response spectrum analysis were assumed the results of floor response spectrum at the reactor pool bottom. Also, the pretension for installation of the anchor bolt of reactor assembly was calculated by using the reaction forces.