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투명방음판의 품질기준 설정에 관한 연구(1) - 기계적 특성 및 안전성 평가
장태순(Chang, Tae-Sun),김철환(Kim, Chul-Hwan),황철호(Hwang, Cheol-Ho) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.12
A variety of materials may be used for soundproof panels. The major advantage of transparent material over traditional materials in noise barriers is aesthetics. The transparent panel materials such as clear plastic or glass are an ideal way of reducing or virtually eliminating the visual impact of a noise barrier. With the use of transparent materials, the drivers' view of the roadside and the sunlight penetration to the highway would not be blocked. Korean Industrial Standards for soundproof panels have been established. But, transparent soundproof panels are not included in this standards. And, some specifications provide only a few basic characteristics for transparent soundproof panels. To develop guidelines on quality criteria for transparent soundproof panel, their mechanical properties such as wind load resistance, safety under impact, and abrasion resistance were experimentally investigated.
김철환(Kim, Chul-Hwan),장태순(Chang, Tae-Sun),김득성(Kim, Deuk-Sung),김동준(Kim, Dong-Jun),장서일(Chang, Seo-Il) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.9
Installing noise barriers is the most common method for reducing the highway traffic noise to the road side residential area. After the report about edge potential concept of a noise barrier, various types of noise reducing devices(NRDs) called 'noise reducers' have been suggested for getting more shielding effect on the top of highway noise barriers. But, it has been doubtful about effect of the NRDs in field because there was no appropriate and unified method to estimate the acoustic performance by using field measurement of the NRDs in Korea. In this study, the authors have considered to setup a practical method to test and estimate the acoustic performance of NRDs. For eliminating the noise reduction effect of the NRDs height itself, the source and measuring points are adjusted as highly as the NRDs height. For the frequency weighting in the estimation of the NRDs effect, the highway noise spectra were measured at asphalt and concrete road side and then averaged for a unit spectral parameter.
이일근 ( Lee Il Keun ),장태순 ( Chang Tae Sun ),박영환 ( Park Young Hwan ),이호준 ( Lee Ho Jun ),박창호 ( Park Chang Ho ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
This study introduces abnormal noise phenomenon of steel deck plate bridge which have not been mentioned in the literature or reports. The abnormal noise occurred from the time when the girder was installed and the welding was completed. And it had continued after the bridge opened. In this study, firstly, the characteristics of abnormal noise is analyzed. Also it presents the mechanism of noise generation.