가속도 크기 변수에 따른 수직진동에 대한 인지수준 고찰

이민정(MinJung Lee),한상환(SangWhan Han) 한국소음진동공학회 2014 한국소음진동공학회 논문집 Vol.24 No.9

Occupants induced floor vertical vibrations may cause other occupants annoyance and lead to social loss. To help control such floor vibrations, several criteria have been developed mostly based on human perception tests and floor vibration tests. Floor vibration is evaluated by comparison with criteria and vibration parameters of subject floor, such as frequency, damping ratio, acceleration value, vibration duration time and occurrence frequency. Three acceleration value parameters are used in criteria; peak acceleration, rms acceleration and VDV, when a floor vibration serviceability is evaluated. Meanwhile rms acceleration and peak acceleration are adopted as vibration limit value in criteria and researches of human perception for vibration. Occupants induced floor vibration is transient rather than steady state. However, rms acceleration is not reliable parameter for evaluating transient vibration. The objective of this study is to investigate the characters of human perception level according to acceleration value parameters for vibration induced by heel impacts and walking activities.

진동대 실험을 통한 보행진동과 뒷꿈치 충격진동의 인지수준 비교

한상환,이상욱 한국소음진동공학회 2003 한국소음진동공학회 논문집 Vol.13 No.3

Floor vibrations in residence and office buildings are typically induced by heel drop and walking movement of occupants. The criteria of most vibration provisions have been developed based on the vibration caused by heel drop impact rather than walking. There may be considerable differences between the vibration characteristics induced by walking and heel drop. The effect of walking vibration was not well reflected on current provisions. In this paper, shaking table test was performed to investigate the human perception level against the vibrations due to walking and heel drop. This study attempts to compare the human Perception level of two different vibration sources. Also, this study investigates the effect of damping on a Perception level under heel drop and walking vibration.

고가선로 연변 철도진동 특성에 관한 실험적 연구

최재규 한국기계기술학회 2014 한국기계기술학회지 Vol.16 No.5

The train noise and vibration nearby the elevated railway make one specific issue. For the elevated railway, this paper concerns vibration by the bridge. this paper presents vibration level of vibration source of train. The prediction model gives the effects of ground attenuation, and barrier attenuation of noise. The acceleration array method is used to search vibration propagation characteristics of elevated structure to predict the vibration propagation from an elevated railway. Based on the results, this paper proposes the source model of elevated structure-borne vibration and the calculation model for elevated railway vibration. Also measure results are presented with rolling vibration and elevated structure vibration.

스프링과 방진고무가 결합된 제진장치의 응답가속도 평가

원은비 ( Won Eun-bi ),문주현 ( Mun Ju-hyun ),양근혁 ( Yang Keun-hyeok ) 한국구조물진단유지관리공학회 2022 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.26 No.1

이 연구에서는 스프링과 방진고무가 융합된 제진장치를 개발하고 진동대 실험으로부터 응답가속도 거동을 평가하였다.

고가선로 연변 철도진동특성에 관한 연구

김병삼 ( Byoung-samkim ),김향우 ( Hyang-woo Kim ),박진규 ( Jin-gue Park ) 한국환경기술학회 2005 한국환경기술학회지 Vol.6 No.3

최근 철도소음과 진동으로 인한 환경오염의 영향이 심각한 실정이다. 더불어, 우리나라의 경우에는 철도소음과 진동에 관한 측정결과가 충분하지 않고, 객관적으로 평가할 수 있는 기준치가 미흡하다. 따라서, 본 연구에서는 철도진동과 전파와 저감특성을 조사하고자 하였다. 본 연구결과는 앞으로 철도진동에 관한 저감방안을 수립하는데 있어 기초 자료로 활용될 것으로 예상된다. In recently, rail traffic noise and vibration have an serious effect for physical and spiritual health and has become a very serious environmental pollution on the residents living nearby railway tracks. Nevertheless, in our country, adequate guide lines for the vibration are not yet established because of the lack of basic data and insufficient research works. In this paper, this study attempts to surveys the characteristics of attenuation and propagation of rail vibration. and as carry out at the same time the effect of vibration of structures. This study intends to get a basic data in establishing a standard and effective vibration plans for rail vibration in the future.

댐 수차 발전기 진동의 전달특성에 관한 연구

주덕훈(Ju Duck-Hoon),윤재현(Yun Jae-Hyun),조성수(Cho Sung-Su),김재수(Kim Jae-Soo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1

Waterpower Generation, as the electric power-generating system using the head of water, is an electricity generating method that obtainable the energy economically and effectively. However, during the operation time of the hydraulic turbine dynamo for Waterpower Generation, since a huge Vibration is occurring thereat, it influences to the pleasant working environment of the adjacent office, also possibly can effect on the structure of building and the structural stability of office room, too. Accordingly, this Study has tried to grasp the Vibration Characteristics of hydraulic turbine dynamo on the subject of Daechung Dam, and also tried to catch its transmitting process of such Vibration. It is considered that such material could be utilized as the useful data hereafter in control of such Vibration at the Dam.

도시철도의 적합한 궤도 구조 선정에 관한 고찰

이철(Chul Lee),곽두영(Doo Young Gwak),김만철(Man Cheol Kim),박용걸(Yong Gul Park) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10

본 연구의 목적은 국내 여건상 도시철도의 건설이 소음·진동에 민감한 정온시설 근접부에서 다수 시행되고 있고, 각종 피해와 이로 인한 민원이 증가하고 있는 추세인 점을 감안 시공단계에서부터 진동 및 진동으로 인한 피해를 예측하고 대응방안을 마련하기 위함이다. 연구과정에서 궤도구조에 따른 진동의 특성을 실측을 통하여 비교 분석하고, 전달 과정에서의 손실의 차이를 예측하였으며, 그 결과로 현재의 법적 기준을 만족하기에 적합한 궤도구조를 선정하는 기준을 제시한다. This Paper presents some optimal solutions for curing a problem which brings urban transit systems constructed nearby the vibration-noise-sensitive facilities such as aquariums, hospitals and schools. Take into consideration of increasing public complains relating with construction damages from noise and vibration, it is necessary to provide solutions for expecting damages from the vibration of urban transit at the early stage of construction. This study provides a appropriate standards at the current legal system applied to the adoption of track structure by analyzing the vibration specialty related with the track structure against the monitoring value, and expecting the losses of vibration values during transition procedure.

공동주택 기계실 설비기기의 진동 및 전달특성에 관한 연구

조창근(Chang-Geun Cho),신일섭(Il-Seop Shin) 한국생활환경학회 2008 한국생활환경학회지 Vol.15 No.1

It is necessary to understand the vibration characteristic of building equipment for establishing appropriate evaluation guidelines of vibration generated from them in buildings. The purpose of this study is to propose the basic data for appropriate evaluation and design strategy of vibration from building equipment by analyzing vibration and its propagation from them. In this study, field measurement of vibration acceleration level from building equipment in mechanical facility room and bathrooms were carried out in the subjected apartment building. Vibration acceleration levels and their propagation through the structure, and coherence functions among the vibration signals were analyzed as well. As the result, the vibration acceleration levels were 81.4~91.0 ㏈ in the measured building equipment, and their peak levels showed in the frequencies under 100 ㎐. Vibration reduction of the boiler was 35 ㏈, that of the fan was 17.8 ㏈, and that of the generator was 7.5 ㏈ in the propagating path. The coherence functions between walls and floors were over 0.5 in the frequencies under 100 ㎐ by the vibration propagation through walls.

그라인더(grinder) 사용에 의한 Hand-Arm Vibration Syndrome(HAVS)의 6예

임상혁,김록호,양길승,양정인,김상섭,전형준,박시복 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.3

목 적 : 수지증상이 있는 진동공구 작업자 8명에 대해 객관적이고 체계화된 진단방법을 이용하여 수지진동 증후군을 진단하고자 시행하였다. 방 법 : 과거병력, 가족력 등의 문진과 혈액 및 소변, 방사선 검사를 통해 다른 원인에 의한 레이노씨병을 배제하였고, 공구 측정 결과를 이용하여 작업과의 관련성을 보았으며, 냉수 침지검사와 근전도 검사를 통하여 수지진동 증후군을 진단하고자 하였다. 결 과 : 수지증상이 있는 진동공구 작업자 8명에 대해 과거병력, 가족력, 약물복용 및 과거 직업력 등 레이노씨병을 유발하는 요인에 대하여 조사하였고 특이점은 발견하지 못하였다. 다른 원인에 의한 레이노씨병을 배제하기 위해 혈액 및 소변, 방사선 검사를 하였고 8명 모두에서 특이 소견을 발견하지 못하였다. 위의 문진과 검사결과로 다른 원인에 의한 레이노씨병을 배제할 수 있었다. 해당사업장의 진동 공구 측정결과를 근거로 피검자의 공구가 ISO의 허용기준을 초과함을 알 수 있었다. 냉수 침지검사와 근전도 검사를 이용하여 피검자 8명중 6명이 말초 혈액순환 장해와 말초 신경염이 있는 것으로 진단되었다. 위의 내용을 근거로 6명은 진동에 의한 수지 진동 증후군으로 진단할 수 있었다. 결 론 : 수지증상이 있는 진동공구 작업자 8명에 대해 객관적이고 체계화된 진단방법을 이용하여 수지진동 증후군을 진단하였다. 해당 사업장의 진동 공구 작업자의 진동에 대한 검진이 필요할 것으로 생각된다. Objectives : To confirm the HAVS In workers exposed to hand-arm vibration with using the objective diagnostic methods. Methods : Several tests were used to help substantiate a clinical diagnosis of HAVS. Some other diseases were excluded by a medical interview, hematologic assessment, urinalysis, X-rays. The hand-arm vibration acceleration level of the grinder was evaluated for considering HAVS. Peripheral vascular changes were examined by a cold provocation test. An electromyography was implemented to ascertain the peripheral neural changes. Results : 8 workers with symptoms in hands & fingers, exposed to hand-arm vibration were examined. Some other diseases (primary Raynaud's disease, secondary Raynaud's disease in not occupational origin) were excluded by a medical interview, hematologic assessment, urinalysis, X-rays. The hand-arm vibration acceleration level of the grinder was 7.9 m/sec2. The recovery time of a skin temperature followed finger cooling was significantly prolonged in 6 workers with HAVS. The nerve conduction velocity was reduced in 6 workers with HAVS. Conclusions : So we report 6 cases of HAVS in grinding workers exposed to hand-arm vibration diagnosed objectively by an exclusion of some other disease, hand- arm vibration acceleration level, cold provocation test, electromyography.

Evaluation of vibrotactile sensation level for vehicle accelerator pedal vibration considering the sensitivity of the foot sole

유준선,임선빈,Wheejae Kim,김동욱,Dongju Yoon,박노철 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.3

Vehicle vibrations cause the physical and mental fatigue, thereby degrading the riding comfort. The vehicle accelerator pedal constantly generates vibrations while driving and is in direct contact with the driver. However, relevant studies on the vibration effects of the accelerator pedal have not been sufficiently conducted. This paper presents a method to evaluate the level of vibrotactile sensation perceived by drivers due to the vehicle accelerator pedal vibration and be able to predict riding comfort. Equivalent comfort contours for foot-transmitted vibrations are derived based on the sensitivity of the foot sole measured through vibrotactile sensation tests. With the equivalent comfort contours, weighting filters for three types of vehicles—conventional gasoline, hybrid, and electric—are generated. Then, weighted vibrations representing the vibrotactile sensation level perceived by drivers from the vehicle accelerator pedal are produced by applying the weighting filters to measured vibration data from the accelerator pedal of each vehicle type.