소음폭로작업장의 청력보존관리에 관한 조사연구

김화일 지산간호보건전문대학 1996 지산간호보건전문대학논문집 Vol.14 No.-

도로주변의 단일건물에 의한 도로교통소음의 감쇠

김화일 경성대학교 환경문제연구소 2000 環境硏報 Vol.10 No.1

In land-use planning of residential areas near roads, sufficient countermeasures against road traffic noise should be considered from the beginning of planning stages. To do it, a simple method to estimate the excess attenuation of noise by buildings and houses Is necessary. As the first step in this study, a computer simulation on sound diffraction of road traffic noise caused by a pillar-building is carried out on the basis of Kawai's approximation. As a result, the qualitative relation between noise attenuation and the width of the building is found behind the building. In addition, carried out with RAYNOISE Rev 3.0

4차산업혁명시대하의 한국 물류산업의혁신정책 우선순위에 관한 연구

김화일,성도경,이지영 대한지방자치학회 2023 한국지방자치연구 Vol.24 No.4

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두개의 각주형 건물에 의한 도로교통소음의 감쇠에 관한 연구

김화일 한국환경과학회 2003 한국환경과학회지 Vol.12 No.1

When hours or buildings are adjacent to roads, with no effective prevention of road traffic noise, neighbors are exposed to it. It is important to understand the properties of sound propagation before taking a countermeasure against road traffic noise. It is easy to estimate the properties of sound propagation without obstacles, but very difficult and complex to estimate them with ones. The purpose of this study is to present a useful tool that can estimate the properties of sound propagation. In the beginning of this study, we investigate the attenuation of road traffic noise with two pillar buildings, and presented practical approximate calculation method, and verified that through scale model. The outcomes from this study are as follows : (1) Over second reflection sound waves can be ignored. (2) Diffraction sound waves that happen when reflection sound and first diffraction wave are projected at the wedge of other building can be ignored.

작업환경 소음 개선을 위한 작업자 관점의 우선순위 파악에 관한 연구

김화일 한국산업보건학회 2005 한국산업보건학회지 Vol.15 No.3

This study was aimed at rating the existing work environment noise components and alternatives in point of worker's view. To answer the purpose, AHP(Analytic Hierarchy Process) method is adopted in this research. Based on the AHP method, this research abstracts a mathematically rigorous noise components and alternative's weights and proven process for priority and decision-making. By reconstructing complex hearing conservation programs to a series of pair-wise comparisons, and then synthesizing the results, this study not only helps establishments of noise countermeasure, but also provides a clear rationale for noise alternatives. The result of this study is summarized as follows; 1) Job satisfaction index and noise identification index are 63, 56 respectively. 2) Noise level(15.7%), frequency(14.1%) and directivity(13.6%) are main reasons in worker's ground. 3) There are some difference between the estimation of worker's identification and that of work sites. 4) Low noise machine(14.7%), enclosure(13.2%) and shielding(9.6%) are chosen for noise protection method by workers. 5) Noise environment improvement should be focused on noise source rather than personal protection. 6) By the AHP method, noise source countermeasure have a key role at work environments.

공동주택의 건식 가변벽체 접합부 차음성능 향상을 위한 구조음장 특성 해석기법에 관한 연구

김화일 ( Hwa Il Kim ) 한국환경과학회 2009 한국환경과학회지 Vol.18 No.11

연구논문 : 소음지도 작성을 위한 도로교통소음 예측식의 적합성 연구

김화일 ( Hwa Il Kim ) 한국환경과학회 2007 한국환경과학회지 Vol.16 No.7

복합재료판 구조물의 고유진동수 위상최적화에 관한 연구

김화일(Kim, Hwa-Ill),윤혁기(Yun, Hyug-Gee),한경민(Han, Kyong-Min) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.12

The aim of this research is to construct eigenfrequency optimization codes for plates with Arbitrary Rank Microstructures. From among noise factors, resonance sound is main reason for floor's solid noise. But, Resonance-elusion design codes are not fixed so far. Besides, The prediction of composite material's capability and an resonance elusion by controlling natural frequency of plate depend on designer's experiences. In this paper, First, using computer program with arbitrary rank microstructure, variation on composite material properties is studied, and then natural frequency control is performed by plate topology optimization method. The results of this study are as followed. 1) Programs that calculate material properties along it's microstructure composition and control natural frequency on composite material plate are coded by Homogenization and Topology Optimization method. and it is examined by example problem. 2) Equivalent material properties, calculated by program, are examined for natural frequency. In this paper, Suggested programs are coded using $Matlab^{TM}$, Feapmax and Feap Library with Homogenization and Topology Optimization method. and Adequacy of them is reviewed by performing the maximization or minimization of natural frequency for plates with isotropic or anisotropic materials. Since the programs has been designed for widely use. If the mechanism between composite material and other structural member is identified, extension application may be possible in field of structure maintenance, reinforcement etc. through application of composite material.

부산시 도로교통소음의 3차원 소음지도제작에 관한 연구

김화일 ( Hwa Il Kim ),한경민 ( Kyoung Min Han ) 한국환경정책평가연구원 2007 환경정책연구 Vol.6 No.1

부산은 국내 제2의 도시로서 유동인구 및 물동량의 과다로 교통량이 폭증하여 교통 소음이 증가하는 추세에 있다. 소음지도는 이론적으로 증명된 예측식이나 실험상의 결과로 얻은 경험식 및 지리정보시스템(GIS, Geographic Information System)을 사용하여 소음의 수치와 분포를 계산하여 계절적인 변화나 시간적인 변화에 관한 데이터를 분석하여 제시하여 주는 지도이다. 소음지도는 대상지역 내의 모든 소음원에 대한 영향을 고려하기 때문에 영향 평가 시 정확한 예측이 가능하며 총괄적이고 체계적인 대안의 수립이 가능하고 지리정보시스템(GIS)과의 연계를 통하여 소음노출인구의 파악, 소음저감 대책이나 계발계획의 효율성까지도 판단할 수 있다. 국내에서는 이에 대한 연구가 몇몇 이루어지기는 하였으나 아직 표준이나 기준 확립 이전의 단계에 머물고 있다. 이에 본 연구에서는 부산시를 중심으로 현 상황에서 소음지도를 제작하여 보고 제작과정에서 발생할 수 있는 문제점이나 부족한 부분을 검토하며 소음지도의 활용에 대하여 연구하였다. The traffic noise of Busan, the second largest city in Korea, is polluting the area. Noise map is a map that shows data on an existing or predicted noise condition in terms of a noise indicator, breaches of a limit value, the number of dwellings exposed to certain values of a noise indicator in a certain area, or on cost-benefit ratios or other economic data on mitigation methods or scenarios with Geographic Information System. With noise map, the effect of traffic noise and the efficiency of city development plan are exactly estimated. So making systematic counteroffer is possible with it. This study is aimed to the construction of basis for noise map construction method for domestic use and the area focus is Busan.

부산시 환경소음 자동측정망 설치위치의 적정성에 관한 연구

김화일 ( Hwa Il Kim ),한경민 ( Kyoung Min Han ) 한국환경정책평가연구원 2009 환경정책연구 Vol.8 No.1

부산시 환경소음수준의 연속적 측정이 가능한 소음자동측정망의 합리적 설치·운영은 부산시의 정온한 환경구축 정책 수립을 위한 중요한 관건이 될 수 있다. 도시 내의 환경소음 수준은 지역 환경수준에 영향을 미치는 제반 요인들의 복합적 작용에 의하여 결정된다. 따라서 정확한 환경소음수준의 측정이 선결되어야만 올바른 환경소음 개선대책의 수립과 추진이 가능하다. 현재 국내에서는 환경소음 실태파악 및 소음저감정책 기초 자료의 확보를 위해 최근에 소음자동측정망을 구축 중에 있다. 또한 소음측정망이 설치·운영되는 지역의 경우 측정망 자료의 공개를 통하여 해당 지역의 환경소음 수준을 표시하고 있으나, 측정결과가 시민들이 느끼는 체감 소음을 제대로 반영하지 못하는 것으로 인식되고 있다. 가장 주된 논거는 측정 자료의 신뢰성 부족과 측정망의 불합리한 설치장소로 요약할 수 있다. 본 연구는 현재 부산시 지역에 설치되어 있는 8개 소음자동측정망의 설치·운영실태 분석에 주안점을 두고 있다. To install and operate the Automatic Noise Monitoring Networks reasonably, which able to monitoring environmental noise continually, is an important issue for making decision to urban environment. Noise level is determined by regional environmental factors, that affected by complex urban environment. Therefore, accurate measurement of environmental noise level has top priority to establish and promote appropriate environmental policies. Currently, Automatic Noise Monitoring System is installed for grasping the environmental noise level and preparing basic data for constructing noise-reduction policies. However, this measurement data is recognized not to be able to reflect a sensory noise. The main reason is the lack of reliable measurement data and unreasonable installation site. The main point of this research ought to be the analysis of installed site of noise monitoring system in Busan.