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외압을 받는 수중 운동체 실린더형 동체의 구조 강건성에 관한 연구
장재웅(Jae-Woong Jang),이기선(Gi-sun Lee),신명섭(Myung-Sub Shin),전관수(Kwan-Soo Jeon) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
External water pressure acts on the underwater body according to the depth of operation, and structural robustness of the body is required to perform the stable function and performance of the system in the relevant operating environment. To this end, the buckling effect according to the working water pressure and the water pressure was considered. The structural design of the body was carried out in reference to the ASME rules, and this was reviewed by performing finite element analysis, and the structural robustness was verified through hydrostatic pressure tests.
외압을 받는 수중 운동체 실린더형 동체의 구조 강건성에 관한 연구
장재웅(Jae-Woong Jang),이기선(Gi-sun Lee),신명섭(Myung-Sub Shin),전관수(Kwan-Soo Jeon) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
External water pressure acts on the underwater body according to the depth of operation, and structural robustness of the body is required to perform the stable function and performance of the system in the relevant operating environment. To this end, the buckling effect according to the working water pressure and the water pressure was considered. The structural design of the body was carried out in reference to the ASME rules, and this was reviewed by performing finite element analysis, and the structural robustness was verified through hydrostatic pressure tests.
장재웅(Jae-Woong Jang),이창민(Chang-Min Lee),전관수(Kwan-Soo Jeon) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
A projectile or a high speed entry underwater kinetic body is impacted by a high frequency. Therefore, electronic devices in the kinetic body need to be designed for shock-resistant structures. The structure, layout and stability of circuit card assemblies in electronic equipment were reviewed in consideration of impact direction and impact volume. The modified circuit card assembly is arranged to be stable against the impact of high frequency. And equipment housing was designed to resist against the impact. Based on the acquisition data of MIL-STD-901 Lightweight Shock Test (LWST) and MIL-T-18404 drop table test, modal analysis and SRS analysis were performed to review structural stability of equipment.
이성직,윤화중,전관수 충남대학교 1990 忠南科學硏究誌 Vol.17 No.2
The decay rate of sound in large reverberation room depends on air humidity and temperature. This phenomenon is one of the important part to reverberation time of architectural acoustics. In this paper, the measurement of the reverberation time was carried out according to temperature and humidity in order to obtain the effect of atmospheric sound absorption. T_60 = ((const)·V)/(-S ln(1-α-)+4mV) corrected as T_60 = ((const)·V)/(-S ln(1-α-)+4.41mV) at humidity 70~80% T_60 = ((const)·V)/(-S ln(1-α-)+3.20mV) at humidity 80~90%