사단법인한국소음진동공학회 The Korean Society for Noise and Vibration Engineering

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저널레터 : Trans. Korean Soc. Noise Vib. Eng., Vol. 34, No. 2 한국소음진동공학회 2024-04-26
첨부파일
2024년 3월 제 34권 제 2호 통권 277호
저주파 방진시스템의 스프링 댐퍼 설치 각도 최적화
Optimization of Spring Damper Installation Angle in Low-frequency Vibration-isolation System
장 일 광 · 이 용 우 · 조 재 명 · 홍 성 부 · 장 용 훈
Ilkwang Jang, Yongwoo Lee, Jae Myung Cho, Sungboo Hong and Yong Hoon Jang
The rapidly expanding use of electro-optical tracking systems (EOTSs) in various industries has led to an emphasis on improving their precision and stability. This study investigated an approach to optimize the installation angle of the spring-damper anti-vibration system of an EOTS, particularly in military applications. The spring-damper system was numerically simulated...
모형 선체에 부착한 음향센서를 이용한 추진기 캐비테이션 초생속도 추정 알고리즘에 관한 연구
Study on Decision Algorithm for the Cavitation Inception Speed using Hydrophones Attached to a Model Vessel
이 가 향 · 한 형 석 · 전 수 홍 · 김 용 훈 · 이 석 규
Gahyang Lee, Hyungsuk Han, Soohong Jeon, Yonghoon Kim and Sukku Lee
Underwater radiated noise plays an important role in the probability of detecting a naval vessel. Cavitation has a significant influence on this underwater radiated noise. Therefore, managing the cavitation inception speed (CIS) is an important task for a naval vessel. This study investigated an algorithm to determine the CIS using hydrophones to monitor the underwater radiated noise...
Comparison of Acoustic Radiation Characteristics in the Near and Far Fields Due to the Vibration of a Circular Disk Placed on an Infinite Rigid Baffle Using the Rayleigh Integral Method and Lumped Parameter Method
Rayleigh Integral Method와 Lumped Parameter Method를 이용한 무한 강체 배플 위에 놓인 원형 디스크 진동에 따른 근거리 및 원거리에서의 음향 방사 특성 비교
Seok-Tae Park
박 석 태
The sound pressure measured at the near field exhibits significant fluctuation depending on the size and frequency of the sound source. Therefore, it is necessary to use the sound pressure measured or numerically calculated at a sufficient distance from a radiator to estimate the actual sound power of the source. In this study, we investigated the appropriate distance for measuring...
공사장 소음 피해지역의 예측 소음도를 이용하는 소음 모니터링 시스템 활용 방안 연구
Study on the Utilization of Noise-monitoring System Using Predicted Noise Levels in Construction-noise-impacted Area
유 지 수 · 김 민 종 · 장 서 일
Jisu Yoo, Min-jong Kim and Seo Il Chang
Complaints related to construction-site noise account for the largest proportion of noise-related complaints and are consistently raised annually, necessitating effective management and countermeasures. However, managing construction-site noise is challenging because of the diverse variables that arise during different stages of construction. Furthermore, there are various...
수요응답형 버스 운영에 따른 농촌 지역 도로교통소음 및 소음노출인구 변화에 대한 평가
Evaluation of Road Traffic Noise and Noise-exposed Population Change due to Demand Responsive Transit Bus in Rural Area
이 재 관 · 유 지 수 · 노 창 균 · 박 재 홍
Jae Kwan Lee, Jisu Yoo, Chang-Gyun Roh and Jaehong Park
Demand responsive transit (DRT) services, which are being introduced in rural areas because of the aging and continuous decline of the population, are anticipated to yield economic and environmental benefits through efficient bus operations. This study investigated the road traffic noise resulting from the altered routes of the DRT bus service that is in operation...
차량용 전기모터 하우징의 진동 저감에 관한 연구
Study on Vibration Reduction in Electric Motor Housing for Vehicle
이 현 우 · 장 우 재 · 김 재 성 · 정 진 태
Hyunwoo Lee, Woojae Jang, Jaesung Kim and Jintai Chung
In this study, we experimentally investigated the vibration generated in the housing of a permanent magnet synchronous motor and proposed a design guideline for reducing this vibration by establishing a finite element model of the motor. We acquired the frequency spectra of the vibration signals at various rotational speeds of the motor and identified the excitation frequencies...
프레임 형상 변경을 통한 버스 구동용 모터의 소음저감
Reducing Noise from Bus Drive Motor by Changing Frame Shape
윤 이 훈 · 고 민 재 · 장 우 재 · 윤 신 · 권 성 민 · 박 병 섭 · 나 병 수 · 정 진 태
Yihoon Yoon, Minjae Go, Woojae Jang, Seen Yun, Seongmin Kwon, Byungsup Park, Byungsoo Na and Jintai Chung
This study identified the noise generation mechanism of a bus drive motor and proposed a design guideline for the motor frame to reduce this noise. By measuring the noise and vibration signals, it was found that the noise was amplified at a specific rotational speed, and a frequency analysis was performed to identify the cause. This analysis confirmed that the vibration of the housing and rear...
인휠 모터 시스템 NVH 성능 분석 툴 개발과 이를 이용한 인휠 모터 NVH 개발
Development of In-wheel Motor System NVH Performance Analysis Tool and Its Application for In-wheel Motor NVH Development
이 현 구 · 김 무 석 · 인아폴랏 무랏 · 오자미르 에네스
Hyun Ku Lee, Moo Suk Kim, Murat Inalpolat and Enes Ozdemir
This study developed and applied an IWM modeling and analysis tool for predicting the NVH performances of IWM systems. Using the developed tool, the influences of various air-gap size and pole-slot (p-s) combinations on the NVH performance of an IWM were studied. Decreasing the air-gap resulted in a gradual increase in the motor sound power level. Furthermore, a comparison...
인공지진파를 활용한 시간이력 입력 생성에 따른 기기 내진 응답에 관한 연구
Study on Seismic Responses of Components According to Input Generation Methods Using Artificial Earthquake
라 치 웅 · 노 현 규 · 김 정 현 · 박 노 철
Chi Woong Ra, Hyungyu Roh, Jeonghyun Kim and No-cheol Park
In this study, our objective was to examine a time-history analysis method for simultaneously extracting the dynamic and static seismic responses of nuclear power plant (NPP) equipment. A finite element model of the reactor containment building (RCB) was constructed based on previous research to establish reference structural analysis responses. Additionally, we studied an alternative...
프롭 로터 천이비행 조건 전달행렬 생성을 위한 매개변수 연구
Parameter Study for Generating Prop-rotor Transient Flight Condition T-matrix
김 태 주 · 윤 병 일
Taejoo Kim and Byung Il Yun
A parameter study was conducted to calculate the hub load transfer matrix (T-matrix) for each transient flight condition in order to reduce the hub vibration load through individual blade control (IBC) under transient flight conditions for a 5-blade tilt-prop rotor capable of tilt operation. First, the prop-rotor operating conditions for each transient flight condition...
도로교통으로 인한 신설학교 교사 내 소음영향 예측방법
Road-traffic Noise-impact Estimation Method for Classroom of Newly Planned School
박 원 형 · 김 송 옥 · 이 내 현 · 박 영 민 · 정 재 우 · 장 서 일 · 류 훈 재
Won Hyung Park, Song Ok Kim, Nae Hyun Lee, Young Min Park, Jae Woo Chung, Seo Il Chang and Hunjae Ryu
The purpose of this study was to calculate a correction value for estimating the noise levels in the classrooms of a newly planned school for use in environmental-impact and educational-environment assessments. The study involved measuring and analyzing the outdoor and indoor noise levels in the classrooms of 32 elementary and middle schools located...
고정단 평판의 전 주파수 대역 고유치 추출이 가능한 NDIF법 개발: 제2부(예제 연구 및 고찰)
Development of NDIF Method that Enables the Extraction of Eigenvalues in Entire Frequency Range of Clamped Plates: Part 2 (Example Studies and Consideration)
강 상 욱
Sang Wook Kang
A problem arises in an eigenvalue analysis of an arbitrarily shaped clamped plate using the NDIF method. When the number of nodes is increased to improve the accuracy of the analysis results, the lower-order eigenvalues are not extracted because of the divergence of the system matrix in the low-frequency range. In Part 1 of this report, the cause of this problem was identified using a circular...
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