사단법인한국소음진동공학회 The Korean Society for Noise and Vibration Engineering

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저널레터 : Trans. Korean Soc. Noise Vib. Eng., Vol. 30, No. 2 한국소음진동공학회 2020-05-12
첨부파일
2020년 4월 제 30권 제 2호 통권 253호
간섭계를 이용한 지진 센서 감도의 절대 측정
Absolute Measurement of the Sensitivity of Seismic Sensors by Using the Interferometer
이 용 봉 · 조 완 호 · 정 성 수 · 전 병 수
Yong-Bong Lee, Wan-Ho Cho, Sung-Soo Jung and Byung-Soo Jeon
The absolute measurement of seismic sensor sensitivity is conducted through the application of interferometry to a primary method of accelerometer calibration. Recently, several methods for seismometer calibration were published as ISO standards. These standards are limited to utilization of the comparison and...
내부 유체에 의한 고유진동수 분리 효과를 고려한 배관계의
적절한 시간이력해석 방법론
Methodology for Time History Analysis of Piping System Contains Internal Fluid Including Natural Frequency Separation Effect
이 창 균 · 이 상 정 · 이 은 호 · 박 노 철
ChangKyun Lee, SangJeung Lee, EunHo Lee and No-Cheol Park
In this study, the natural frequency separation phenomena found in the dynamic analysis of piping systems with internal fluids were identified, and methods for efficient seismic time history analysis were studied. We conducted a dynamic analysis of a piping system with consideration for the effect of its internal fluids using the coupled...
공동주택 뜬바닥 구조층 구성에 따른 바닥충격음 차단성능
실험적 연구
Parametric Study on Floor Impact Sound with Design Factors of Layers Composing a Floating Floor in Multi-Residential Buildings
양 홍 석 · 김 태 민
Hong-Seok Yang and TaeMin Kim
The purpose of this study is to examine the main factors in the control of floor impact sound with various design and construction methods of a floating floor. The factors that were considered include the thicknesses of the resilient and mass layers and construction order of the lightweight concrete to secure a floor flatness...
규칙기반과 딥러닝을 동시에 활용한 앙상블 회전체 이상진단
Ensemble Method using Rule-based and Deep-learning Algorithms for Rotating-machine Diagnostics
이 남 정 · 김 성 민 · 정 일 주 · 손 석 만 · 이 승 철
Namjeong Lee, Sungmin Kim, Iljoo Jeong, Seokman Sohn and Seungchul Lee
Unlike the major equipment used in power plants, auxiliary equipment usually does not possess a real-time system to analyze the machine condition. Therefore, detecting the fault of such auxiliary equipment in advance is difficult. Thus, the diagnosis of auxiliary equipment at a less cost is important
for minimizing the downtime due to the fault...
정비 자료 디지털 변환을 위한 영상 인식 알고리듬
: CNN and FCN

Image Recognition Algorithm for Maintenance Data Digitization
: CNN and FCN
이 강 산 · 나 주 원 · 손 종 덕 · 손 석 만 · 이 승 철
Kangsan Lee, Juwon Na, Jongduk Sohn, Sukman Sohn and Seungchul Lee
Tabulated data has been widely used to facilitate systematic and intuitive management. In particular, tabular images that contain a few simple symbols are useful for maintaining mechanical systems. Several companies have accumulated tabular images as their property. Although these images are valuable as they can be used to solve difficult problems...
진동 환경에서 감시장치 적외선 가시광 경통 간 변위 간섭 유무의 해석적 확인
Analytically Confirm Displacement Interference in the Barrel of the Reconnaissance Equipment under Vibration
송 아 영 · 권 병 오 · 한 대 희 · 정 현 수 · 정 혜 진 · 임 성 환
Ah-Young Song, Byung-Oh Kwon, Dae-Hee Han, Hyun-Su Jung, Hye-Jin Jung and Sung-Hwan Yim
The displacement characteristics of infrared and visible light camera barrels in military reconnaissance equipment are analyzed. It is difficult to perform the test with a measurement acceleration sensor because of the structural characteristics of the barrel. It is also challenging to secure the stability of the barrel only by analysis...
디지털 트윈을 사용한 구조 진동 가상 센서 시스템
Virtual Sensing System of Structural Vibration using Digital Twin
오 승 인 · 박 다 은 · 백 현 우 · 김 승 훈 · 이 재 경 · 김 진 균
Seungin Oh, Daeun Park, Hyunwoo Baek, Seunghun Kim, Jai-Kyung Lee and Jin-Gyun Kim
Virtual sensing complements limited real-sensing information using a numerical (or analytical) model that is created with measured data. In this work, we propose a virtual-sensing system for structural vibration. Finite element model updating is employed to calibrate the numerical model to the real model and output modal information, including...
켑스트럼 분석을 이용한 교량 케이블의 신속한 기본진동수 추출
Fast Extraction of Fundamental Frequencies of Bridge’s Stay Cables
using Cepstral Analysis
박 종 칠 · 조 준 상
Jong-Chil Park and Jun-Sang Cho
Stay cables are the most critical structural elements in cable-stayed bridges. The cable tension and variation play a key role in regular inspection and routine maintenance of bridges. To monitor and evaluate cable tension forces, ambient or experimental vibration measurements are widely used in bridge engineering. Vibration-based...
유한요소해석을 이용한 중량충격원 종류 및 평가지표 별
바닥충격음 예측 정확도 검증
Prediction of Heavy-weight Floor Impact Sound with Different Impact Sources and Indices using a Finite Element Method
김 태 민 · 양 홍 석
TaeMin Kim and Hong-Seok Yang
In this study, we determined the reliability of the finite element method in predicting heavy-weight floor impact sounds after comparing the predicted and measured frequency response functions of vibration and acoustic sounds in full-scale houses. The heavy-weight impact source included a bang...
축소 모델을 활용한 통합마스트의 구조건전성 검증 방안 연구
A Method of Evaluating Structural Integrity of Integrated Mast
with Scaled Model
이 종 학 · 손 동 훈 · 이 건 민 · 김 동 준 · 박 상 원 · 박 노 철
Jong-Hak Lee, Donghoon Son, Keonmin Lee, Dongjoon Kim, Sangwon Park
and No-Cheol Park
Integrated masts, equipped with radars and other sensors, reduce radar cross sections and improve destroyers’ stealth ability. Because of their critical impact on ships’ survivability, they have to undergo vibration tests to ensure their structural integrity. However, testing of gigantic shipboard equipment is difficult, time-consuming, and...
발사장치를 포함한 소형 초음속 제트 소음 예측 및 검증
Supersonic Jet Noise Prediction and Validation for a Small-scale Rocket Nozzle with Launch System
주 현 식 · 박 태 영 · 강 승 훈 · 장 인 만 · 엄 원 석 · 신 상 준
Hyun-Shik Joo, Taeyoung Park, Seung-Hoon Kang, Inman Jang, Won-Suk Ohm and Sang-Joon Shin
A launch system is used to vertically launch a high-speed rocket or space vehicle. During the launch event, intense acoustic load is generated from the downstream of the supersonic jet and propagated in all the directions. In this study, two types of the supersonic jet noises were investigated: 1) noise of a supersonic free jet...
미세티끌 효과에 대한 마찰진동 연구
Friction-induced Vibration by Dust Effect
남 재 현 · 강 재 영
Jaehyeon Nam and Jaeyoung Kang
In this study, the friction-induced vibration of the reciprocating device is measured under dust conditions and he dynamic instability mechanism using the analytical finite element model is proposed. In the case of absence of dust, a friction-induced vibration did not occur and the corresponding friction coefficient increased with the increase in...
볼트의 소리 신호를 이용한 합성곱 신경망 기반 체결력 측정 방법
Measurement of the Clamping Force by Using the Sound Radiation from the Bolt based on ConvNet
도 경 민 · 김 완 승 · 권 재 수 · 박 준 홍
Gyungmin Toh, Wanseung Kim, Jaesoo Gwon and Junhong Park
This paper presents a novel method for measuring the clamping force using sound that occurs during bolt fastening. The resonance frequency of the bolt increases with the progress of the fastening process. This characteristic change is utilized as the feature analyzed by a convolutional neural network (CNN). The clamping force is measured using...
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