• Journal of KSNVE
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• v.14 no.4
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• pp.29-39
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• 2004

항공기 소음 규제 단계(stage) IV를 앞두고 세계의 주요 항공기 및 항공기 엔진 회사들은 자사의 존망을 걸고 저소음 관련 기술 개발에 전력을 기울이고 있다. 이런 항공산업계의 경쟁은 자국의 산업을 보호하고자 하는 국익과 맞물려 미국과 유럽 간의 무역분쟁으로 치닫고 있는 형국이다. 반면에 우리나라는 주요 민간항공기나 항공기 엔진 제작회사가 없는 관계로 이러한 전세계적 경쟁에서 한 발 물러나 있는 실정이다. (중략)

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1995.10a
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• pp.99-103
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• 1995

소음저감 설계기술은 제품의 경쟁력 향상을 위해 자동차, 항공기, 건설 장비, 선박, 심지어 가전 제품에 있어서도 소음 문제에 대한 관심이 크게 대두되고 있다. 특히 수출을 하기 위해서는 그 지역의 소음 규제법을 만족시켜야 하며 제품의 경쟁력을 위해서는 그 이상의 것이 요구되고 있다. 또한, 소음 문제는 소비자의 제품구매 선택에 영향을 주기도 한다. 일본의 경우 JIS 규격으로 건설 장비의 소음을 규제하고 있으며, 소음수준에 따라 일반 장비, 저 소음 장비, 초 저소음 장비로 구분하여 장비에 따라 건설 작업을 제한하기도 하며, 특히 초 저소음 장비 인증을 받은 것은 장비 사용 단가 및 사용에 있어 차등을 두어 혜택을 주고 있다. 본 논문에서는 현재 구미지역에서 소음규제로 사용되는 BITA 방식에 따라 지게차의 소음원 규명 및 소음 저감 대책을 논하고자 한다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.11a
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• pp.725-738
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• 2006

The final purpose of this study is to develop noise abatement procedures for minimizing damages caused by aircraft noise, to establish appropriate noise limits and to suggest a plan for imposing surcharges and penalties on aircraft infringing the noise limits. This study establishes noise abatement procedures and suggests a plan to complement and improve upon NMS in Gimpo International Airport by reviewing the NMS structure. In addition, this study establishes a noise limit at each noise monitoring system and a verification system to discriminate infringing aircraft. Finally, this study suggests a control plan for aircraft infringing the noise limit.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.17 no.5 s.122
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• pp.379-390
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• 2007

The final purpose of this study is to develop noise abatement procedures for minimizing damages caused by aircraft noise, to establish appropriate noise limits and to suggest a plan for imposing surcharges and penalties on aircraft infringing the noise limits. This study establishes noise abatement procedures and suggests a plan to complement and improve upon NMS in Gimpo International Airport by reviewing the NMS structure. In addition, this study establishes a noise limit at each noise monitoring system and a verification system to discriminate infringing aircraft. Finally, this study suggests a control plan for aircraft Infringing the noise limit.

• The Journal of the Acoustical Society of Korea
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• v.36 no.2
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• pp.89-99
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• 2017

Multi-rotor type UAV (Unmanned Aerial Vehicle)s are expanding their applications not only for military purposes but also for private industries such as aerial photography and unmanned delivery vehicles. For wider use of unmanned aerial vehicles, studies should be carried out to improve aerodynamic efficiency and reduce noise of propellers, which can be achieved based on techniques of predicting aerodynamic performance and noise in a given environment. In this study, aerodynamic and noise prediction techniques were developed for a small unmanned aerial vehicle propeller, and it was verified by comparing it with actual measurement results. Thrust and torque due to the change of r/min and the frequency spectral prediction at a given position secured the reliability of the prediction method, which provides a basis for the shape design of the propeller.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.31 no.4
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• pp.116-125
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• 2023

Gimpo International Airport is a strategically utilized airport based on government policy, but there are many residents living around the airport, so it is very sensitive to changes in airport operation. In the past, similar noise results were obtained for aircraft noise at Gimpo International Airport despite changes in aircraft types and an increase in the number of aircraft operating, and recently ICAO proposed a low-noise aircraft noise standard (Ch.14). Since the new standard has a noise reduction effect of up to 15dB compared to existing aircraft noise, ICAO and Europe EASA predict that future aircraft noise will be reduced if the latest technologies such as low-noise aircraft are applied. Therefore, this study establishes the aircraft operation performance and measured noise of Gimpo International Airport in 2022 as a baseline scenario, noise changes using various scenarios of introduction of low-noise aircraft, operation of mid-to-long-distance routes, and changes in future air traffic demand were analyzed using simulation.

• Journal of the KSME
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• v.32 no.9
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• pp.777-787
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• 1992

21세기를 향한 여객선의 추세는 초고속화, 대형화(국제화), 성에너지화, 우수한 내항성능, 저진동 및 저소음 등을 갖춘 선박을 요구하고 있다. 이런 관점에서 초고속선으로 속력에 한계가 있는 단동선 (monohull), 쌍동배수량형(catamaran), 최소수면 쌍동선(SWATH)의 선형과 대형화가 곤란한 수중익선 (hydrofoil)보다는 속력면에서 유리하고 대형화가 가능한 표면 효과선 또는 앞 에서 언급한 고속 선형의 장점을 복합시킨 각종 복합선형이 개발되리라고 생각한다. 그러나 복 합선형이 실용화되기까지는 경제적인 건조비, 운항자세 제어 시스템, 신소재를 이용한 경구조화, 진동과 소음, 추진 시스템 등에 대한 요소 기술의 개발이 선행되어야 한다. 끝으로 선박의 속력이 50노트가 넘는 초고속선을 설계, 제작, 운항을 하는데 있어 그 개념이 조선공학에서 다루어지는 통상 선박기술의 연장이라고 그 영역을 정리하는 경향이 있다. 이 글을 정리하면서 느낀 것이 지만 해상교통 수단의 초고속화가 이루어질수록 그 지지기술 및 자세제어기술 등에 있어서는 항공기 기술에 가까워짐을 알게 되었다. 그러한 뜻에서 초고속선 개발에는 항공기 기술에서 얻 어진 노하우를 잘 활용하는 일도 중요하리라 생각된다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2007.05a
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• pp.1033-1037
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• 2007

The final purpose of this study is to develop noise abatement procedures for minimizing the environmental impacts caused by aircraft noise in the vicinity of Gimpo Int'l Airport, and to establish appropriate noise limits and monitoring system. The results of study was suggests for more detail the crucial factors which one is reference noise level, $L_{MAX}=88dB(A)$ at 6.5km after take-off, and second one is to installation the additional three(3) noise monitoring system on both side of runway.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2008.04a
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• pp.899-903
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• 2008

The purpose of this study is to establish the noise abatement procedures in Kimhae International Airport and also make noise limit and methods to monitor and detect an aircraft flying over Kimhae airport. First of all, noise monitoring system(NMS) should be set up, have a test and noise limit will be adjusted afterwards. Before applying Noise Abatement Procederes and noise limit, the amendment of Aviation Law 'article 108' required to proceed. The accumulative data and long term process of NMS will proceed and it is necessary to issue a notification of noise limit in phases.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.17 no.9
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• pp.874-880
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• 2007

The final purpose of this study is to develop noise abatement procedures for minimizing the environmental impacts caused by aircraft noise in the vicinity of Gimpo Int'l Airport, and to establish appropriate noise limits and monitoring system. The results of study was suggests for more detail the crucial factors which one is reference noise level, $L_{MAX}=88 dB(A)$ at 6.5 km after take-off, and second one is to installation the additional three(3) noise monitoring system on both side of runway.