• Journal of the KSME
• /
• v.27 no.2
• /
• pp.109-112
• /
• 1987

산업이 고도화 되면서 기계장비의 중량화와 고속화가 가속되어지고 있으며, 이로 인하여 과다한 진동과 소음을 유발시키고 있다. 특히 교통량이 많은 도로변의 건물 및 주택가에 소음공해가 심하며, 고속도로 및 철도연변의 건물 및 주택가는 비록 차음벽을 설치하여 많은 소음을 차단해 주지만 미흡한 상태다. 또한 철도 진동이 주위 건물 기초로 전파하여 건물의 진동을 유발하여 건물벽체가 갈라짐의 원인이 될 수 있다. 따라서, 교통 소음이 심한 장소에서는 차음율이 높은 재료를 사용하여 공기음을 차단하며, 건물의 유리창은 가능한 한 2겹유리(pair glass)를 사용한다. 또한 철도 연변의 건물기초는 베어링 페드를 사용하여 지반으로 전파되는 진동을 차단하여 줌으로써 안락한 주거환경 및 근무환경을 조성하리라 생각한다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2022.07a
• /
• pp.293-296
• /
• 2022

본 논문에서는 실제 주행하는 철도가 지나가는 터널에서 유발되는 안전사고 및 주변에 거주하는 주민들과, 서식하는 야생동물들에게 피해를 입힐 수 있는 소음과 진동을 감지하고, 철도가 터널을 운행하는 상황을 구현하여, 너털에서의 위험 요소들에 대한 상황 데이이터들을 센서를 통해 데이터 수집을 진행하고 다양한 위험 상황으로부터 실시간 감지를 통해 데이터들을 분석하고 적절한 상황 지원을 위한 실시간 인지시스템 모델을 설계하고 지원한다.

• Journal of Korean Society of Steel Construction
• /
• v.10 no.2 s.35
• /
• pp.263-277
• /
• 1998

Recently, it is frequently reported that fatigue damages of deck slabs and floor systems of highway bridges occur under the conditions of increasing weight and traffic of heavy vehicles. These troubles are affected by dynamic wheel load of heavy vehicles running on roadway surface roughness with bump at expansion joint. It is required that this kind of traffic-induced vibration of highway bridges must be analyzed by using three-dimensional models of bridge and vehicle. In this study, the three-dimensional dynamic analysis is carried out, and dynamic responses of deck slab and wheel loads of moving vehicle are estimated according to different vehicle speeds and bump heights. Analytical responses of bridge deck slab are compared with experimental ones which were measured at Umeda entrance bridge of Hanshin Expressway in Osaka.

• Journal of Korean Society of Environmental Engineers
• /
• v.22 no.6
• /
• pp.1103-1111
• /
• 2000

With the rapid industrial development, a railway has become a main traffic means. But, rail traffic noise and vibration have become a major problem in urban area as well as a very serious issue in the living environment. Especially, noise and vibration induced by the rail operation have influenced on the residents' living nearby railway tracks. Nevertheless, adequate guidelines for the railway vibration are not yet established because of the lack of basic data and insufficient research works. In this point, the present study attempt to survey the effect and subjective response of railway vibration in urban area using questionnaire. This study also presents a basic data in establishing effective vibration plans for railway vibration in the future.

• Proceedings of the Korean Institute of Industrial Safety Conference
• /
• 2003.10a
• /
• pp.286-292
• /
• 2003

철도는 1960년대 산업화 이후 급속한 도시화 과정에서 인구의 집중, 도시의 비대화로 인해 늘어나는 교통의 수요와 대량운송 및 정시운행이라는 장점으로 국가산업의 발전과 국민편익에 편리함을 제공하는 등의 지대한 공헌을 하였다. 그럼에도 불구하고, 이러한 발전과 편리함 속에 소음과 진동의 환경공해를 유발하여 철도 주변에 위치하고 있는 거주시설 및 상업시설 등의 거주민들이 생활을 영위함에 있어 불쾌감, 수면방해, 집중력 감소, 시설물의 피해 등의 영향을 주고 있다.(중략)

• Proceedings of the Korean Geotechical Society Conference
• /
• 1993.06a
• /
• pp.15-54
• /
• 1993

Ground Vibrations were measured at one location near the railroad track at a site about 3.2 kilometers north of Chapel Hill, Tennessee, U.S.A., Measurements were made during the passage of 18 freight trains over the six-day period. The objective of this study was to evaluate ground vibration levels from train and other traffic at possible construction depths for the Superconducting Super Collider(SSC), The criterion with which the vibration levels are compared is the more stringent one : that is, 0, 0005 inchs(about 0.0127 m) at 3H2, The measurements show conclusively that vibration levels generated by railroad traffic in the rock at the depth of 100 it (30m) or more are at least 10 times smaller than the criterion.

• Journal of the KSME
• /
• v.20 no.4
• /
• pp.272-277
• /
• 1980

공업발전국은 경제사회의 고도화와 더불어 육상교통 수송량도 급격히 증대해 가고 있다. 그중 에서도 자동차는 화물수송 및 도시민의 교통수단으로 이바지하고 있는바 크다. 그러나 한편 자 동차는 유해가스의 배출 및 소음진동 발생등으로 대도시 간성도로 주변. 산업지대 등의 자동차를 이용하는 사람들의 생활환경을 변화 파괴해 가고 있다. 특히 소음(Noise)은 인간의 문화생활을 영유하는데 심리적으로 또는 생리적으로 각종 장애를 일으키고 있다. 즉 소음이란 "내가 원하지 않는 소리(Unwanted Sound)"로서 심적 불안감과 불유쾌감을 유발하여 피로의 원인이 되기도 한다. 이로써 작업능률의 저하는 물론 심하게 되면 청력장애까지 일으킨다. 이와 같이 도심지에서 가장 문제가 되는 소음원이 자동차라고 할 수 있다. 따라서 본고에서 소음의 특성, 자동차소음의 발생원, 각국의 자동차소음의 규제동향 및 자동차소음의 측정방법과 대책을 간단히 살펴보고자 한다. 살펴보고자 한다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2006.11a
• /
• pp.641-648
• /
• 2006

This study investigates which sound quality indices except SPL raise annoyance response. For investigation, auditory perception experiments for road traffic noise with identical linear SPL were performed by Paired Comparison Method. The numerical results of a Paired Comparison experiment express relative preference about annoyance. So that these relative preference scores are to be correlated to sound quality indices, which are absolute, a transformation is required to go from the relative domain to an absolute and linear scale of preference. The results of the transformation will be the 'merit values,' which quantifies the annoyance(in this case) of the road traffic noise on a linear scale. Using multiple regression, a formula is established that can calculate predicted merit values. Furthermore, This investigation offers a method selecting sound samples that represent various sound quality indices values to use experiment.

• Magazine of the Korea Concrete Institute
• /
• v.8 no.5
• /
• pp.123-133
• /
• 1996

Recently, the construction of infrastructures has been booming and accelerating to keep up with rapid economic growth. Construction activities and operation of transportation facilities cause unfavorable effects such as civil petitions associated with vibration-induced damages or nuisances. Accordingly, the objective of this study is to develop vibration-controlled concrete using various vibration-controlled mixtures, and also to recycle obsolete materials in part. As the first step to achieve this research, preliminary mix designs have been carried out to obtain an appropriate mix proportion above 200kg/$\textrm{cm}^2$ in uniaxial compressive strength. Test specimen based on the mix proportion selected have been actuated by the impact hammer to investigate their dynamic characteristics. Vibration-controlled mixtures are foam, latex, rubber powder and plastic resin, which have been determined to reduce a vibration by and large. KS F2437 and travel time method have been used to figure out 1st natural frequency and dynamic elastic moduli. Damping ratios have been computed by adopting the polynomial curvefitting method and the geometric analysis method on the frequency response spectrum curve. of which results have been compared and analyzed hereon.

• Journal of the Korea Society of Computer and Information
• /
• v.29 no.4
• /
• pp.115-123
• /
• 2024

In this paper, we propose a vibration notification system that combines navigation information and wearable bands to ensure safe driving for the transportation vulnerable. This system transmits navigation driving information to a linked application, converts it into a vibration signal, and provides notifications through a wearable band. Existing navigation systems focus on providing route guidance and location information, so the driver's concentration is dispersed, and safety and convenience are deteriorated, especially for those with mobility impairments, due to standard vision and delayed recognition of stimuli, resulting in an increasingly high traffic accident rate. To solve this problem, navigation driving information is converted into vibration signals through a linked application, and vibration notifications for events, left turns, right turns, and speeding are provided through a wearable band to ensure driver safety and convenience. In the future, we will use cameras and vehicle sensors to increase awareness of safety inside and outside the vehicle by adding a function that provides notifications with vibration and LED when the vehicle approaches or recognizes an object, and we will continue to conduct research to build a safer driving environment. plan.