사단법인한국소음진동공학회 The Korean Society for Noise and Vibration Engineering

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저널레터 : Trans. Korean Soc. Noise Vib. Eng., Vol. 33, No. 3 한국소음진동공학회 2023-06-22
첨부파일
2023년 6월 제 33권 제 3호 통권 272호
회전 중 블레이드 진동 비접촉 측정기술 기반 저압터빈 블레이드 진동특성 분석
Analyzing the Analysis of Vibration Characteristics of a Low-pressure Turbine Blade during Rotation using the based on Non-contact Vibration Measurement Technology
김 동 환 · 김 재 동 · 박 명 수
Dong Hwan Kim, Jaedong Kim and Myeong Su Park
Steam turbines, among the core equipment of a power plant, are being designed in large sizes in response to the continuous increase in power market demands that require high-efficiency power generation facilities. As the size and shape complexity of low-pressure turbine blades also increase, the risk of blade damage is...
방음용 실링재 유무에 따른 틈새 소음 영향에 대한 연구
A Study on the Sound Effect of Slits with or without an Acoustic Sealing
하 헌 주 · 양 성 수 · 강 연 준
Heon Ju Ha, Sung Soo Yang and Yeon June Kang
In indoors, walls block the noise generated in adjacent spaces to ensure an individual relation condition. However, the tranquil environment is restricted by the noise through flanking transmissions. Indirect routes are located in ceilings, floors, doors, windows, and other slits. The slits are sealed with acoustic...
고정익 항공기용 연료파일런 지상진동시험
Ground Vibration Test of Fuel Pylons for Fixed-wing Aircrafts
조 상 환 · 최 현 경 · 김 영 신 · 김 성 찬 · 김 현 기
Sang-hwan Cho, Hyun-kyung Choi, Young-shin Kim, Sungchan Kim and Hyun-gi Kim
The ground vibration test is a method of experimentally obtaining the dynamic characteristics of a structure, such as the natural frequency and natural vibration mode. It aims to verify the reliability of the numerical analysis model by comparing the numerical analysis results with the ground vibration test results or improve...
초음파 유도관에서 꺾임부 형상에 따른 파동 전파
Wave Propagation based on Elbow Shape in an Ultrasonic Waveguide
김 원 묵 · 김 진 오
One Mook Kim and Jin Oh Kim
This study deals with wave propagation based on the elbow shape in a linear waveguide coupled with an ultrasonic sensor. The elbow was introduced to reduce the waveguide length. Three elbow shapes were designed and their wave propagation performance was evaluated. The received wave was monitored, and its amplitude...
중량부품 지지대 보강에 의한 원자력 발전소 배터리 차져의 내진한계상태 비교
Fragility Comparison of Battery Chargers for Nuclear Power Plants depending on Reinforcement of Supporting for Massive Components
정 영 수 · 장 성 진 · 김 성 완 · 박 준 희 · 박 동 욱
Young-Soo Jeong, Sung-Jin Chang, Sung-Wan Kim, Jun-Hee Park and Dong-Uk Park
In South Korea, nuclear power plant equipment are designed and qualified according to the Nuclear Regulatory Commission (NRC) Regulatory Guide 1.60 (R.G. 1.60). However, the uniform hazard spectrum (UHS) at the nuclear site in Uljin area exhibits a higher response acceleration in the high frequency range in comparison...
직선부와 곡선부를 결합한 파동유도관에서 초음파 전파
Ultrasonic Propagation in a Waveguide Combining Straight and Curved Parts
이 제 홍 · 김 진 오
Jae Hong Lee and Jin Oh Kim
This study assesses the ultrasonic propagation in a waveguide structure combining straight and curved parts designed to shorten the minimum detectable distance of an ultrasonic sensor used for distance measurement. The straight guide part is necessary for the wave transmitted through a curved part to not deviate from the intended...
청감실험을 통한 옥타브밴드별 고무공충격음의 최소인지한계와 어노이언스 주관적 반응 분석
Subjective Response Analysis of Just Noticeable Difference and Annoyance due to Octave Band Impact Sound Emitted by a Rubber Ball via an Auditory Perception Experiment
하 연 수 · 김 명 준
Yeon-su Ha and Myung-Jun Kim
In this study, subjective responses to rubber ball impact sounds in each octave band for JND and annoyance were investigated through an auditory perception experiment. Based on previous studies, two representative spectra of rubber ball impact sound were used. The spectraum A and B of rubber ball impact sound were acquired from the floors...
함정 추진축계 기동, 정지 시 발생하는 스틱-슬립 비선형 진동 연구
Study on the Stick-slip Nonlinear Vibration of the Propulsion Shaft of a Naval Vessel when Starting and Stopping
한 형 석 · 전 수 홍 · 김 용 훈 · 이 가 향
Hyungsuk Han, Soohong Jeon, Yonghoon Kim and Gahyang Lee
Nonlinear vibration problems caused by the stick-slip friction between the water lubricating bearing and shaft in naval applications occur frequently. When the stick-slip nonlinear vibration occurs in a propulsion shaft, noise and vibration in the ship structure, as well as the shaft system are generated irregularly with high amplitude. Because stick-slip ...
앵커기초의 균열을 고려한 모형 전기 캐비닛의 지진거동특성 분석을 위한 진동대실험
Shake Table Test for Seismic Behavior Characteristics Analysis of an Electrical Cabinet Model Considering Cracks in the Anchor Foundation
윤 다 운 · 전 법 규 · 김 성 완 · 소 기 환 · 이 승 준
Da-Woon Yun, Bub-Gyu Jeon, Sung-Wan Kim, Gi-Hwan So and Sung-Jun Lee
During the safety assessment of nuclear power plants, it is important to verify the performance of safety-related equipment and examine the performance deterioration caused by aging. In this study, an electrical cabinet model and anchor foundation were designed and manufactured based on the results of the Kori Unit 1 field survey...
소음 데이터를 이용한 딥러닝 기반의 차량 진단 기술 개발
Development of Deep Learning-Based Vehicle Diagnosis Technology Using Noise Data
노 경 진 · 이 동 철 · 진 재 민 · 정 인 수 · 장 준 혁
Kyoungjin Noh, Dongchul Lee, Jaemin Jin, Insoo Jung and Joon-Hyuk Chang
In this paper, we propose deep learning models for fault diagnosis and noise level estimation using vehicle noise data. First, we use two spectrograms as a feature vector by converting the input signal and the signal of the separated percussive component in the input signal. For fault diagnosis, we design a classification model. Two spectrograms...
좁은 주파수 대역의 랜덤 가진을 받는 블레이드 어셈블리에서 인위적인 미스튜닝에 의한 마찰 댐퍼의 성능 변화
The Performance of Friction Dampers on the Intentionally Mistuned Bladed Disk Assembly Subjected to Narrow Band Random Excitation
차 덕 순
Douksoon Cha
In this study, the effects of intentional mistuning on the performance of B–B friction dampers are investigated in an inherently mistuned bladed disk assembly subjected to narrow band random excitation. The intentional large mistuning and inherent small mistuning are modeled by the additional mass and perturbations in the stiffness...
와류기인진동과 소프트갤러핑 응답에서 원통형 실린더의 유체력 추정연구
Estimation of Fluid Forces During Vortex-Induced Vibrations and Soft Galloping Response in a Circular Cylinder
박 홍 래
Hongrae Park
Different types of flow-induced vibrations are caused by fluid flows. Vortex-induced vibrations (VIV) generally occur in circular cylinders, while galloping is observed in non-circular ones. In the present study, VIV and soft galloping were investigated using a circular cylinder. To initiate soft galloping by changing the geometry of the circular...
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