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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.
JRTR 제어봉구동장치의 구조건전성 평가를 위한 내진시험
최명환(Myoung-Hwan Choi),김경호(Gyeong-Ho Kim),선종오(Jong-Oh Sun),조영갑(Yeong-Garp Cho) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4
A control rod drive mechanism is a reactor regulating system, which inserts, withdraws or maintains a control rod containing a neutron absorbing material within a reactor core to control the reactivity of the core. The top-mounted CRDM for Jordan Research and Training Reactor has been designed and fabricated based on the HANARO’s experience. This paper describes the seismic test results to evaluate the structural integrity of CRDM drive assembly. The tests are carried out at two test rigs simulating the upper part of reactor pool. The seismic test results show that the CRDM maintains the function and structural integrity without changes of natural frequencies before and after 5 OBE and 1 SSE load excitations. Also, the stepping motor during the OBE load is driven having a good stepping performance without a malfunction.