• Title/Summary/Keyword: 선내 탑재 장비

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A Study on the Evaluation of Vibration Characteristics for Onboard Machinery with Resilient Mountings (선내 탑재 장비용 마운팅 시스템의 진동특성 평가에 관한 연구)

  • Choi, Su-Hyun;Kim, Kuk-Su;Cho, Yeon;Kim, Byoung-Gon
    • Journal of the Society of Naval Architects of Korea
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    • v.39 no.1
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    • pp.73-81
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    • 2002
  • This study is performed to evaluate and design the vibration characteristics of the onboard machinery with resilient mountings. To reduce the vibration revel of onboard machinery with resilient mountings, it is important to evaluate and, if necessary modify vibration characteristics of the resilient mountings. In this study we have developed a program to calculate natural frequencies of the machinery with resilient mountings, forced vibration levels due to internal excitation force of the machinery itself and external excitation forces of the main engine and the propeller, and the force and motion transmissibility of the resilient mountings. The developed program can be also applied to optimal design of the resilient mountings for obtaining a target natural frequency and for achieving a minimum forced vibration level at the center of gravity of the machinery.

A Study on Integrated Information and Communication Network for Oceanographic Research Vessel (해양 조사선의 종합정보통신망 구축방안 연구)

  • 박종원;강준선;임용곤;홍석원
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2001.05a
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    • pp.167-172
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    • 2001
  • This paper deals with the network interface of research and observation instruments in the oceanographic research vessel, an establishment of related database for measured information. The system is implemented to integrated communication network system which allows to effective survey and real time-based observation through the establishment of GUI(Graphic User Interface). The system also consists of the LAN systems and serial interface with chemical, physical, biological, and environmental relations. And, other network service, vessel data service for data communication between vessel and earth station using the INMARSAT-B, and network service(WWW, BBS, E-Mail etc.) are needed for integrated communication network system.

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A Study on Development of Multipurpose Ship's Interface Unit (범용 선박신호연동장치의 개발에 관한 연구)

  • Jeong, Tae-Gweon;Park, Soo-Han
    • Journal of Navigation and Port Research
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    • v.31 no.6
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    • pp.463-470
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    • 2007
  • Each on-board equipment providing navigational and engine information has different signals. These signals should be analyze, be transformed to the standard digital form and be transmitted to each client on board through the earlier developed ILU (integrated LAN unit). Therefore this paper was to analyze the signals of each equipment for navigation and engine and was to use the serial technology necessary for the equipment and IDU (information display unit). And this paper was then to develop an SIU (ship's interface unit) and to test it onboard.

A study on the Electromagnetic Environment for the Navigation Device and Propulsion Device in Ship (선내 항해통신장비 및 추진장비에 대한 전자파환경 연구)

  • Cho, Hyung-Rae;Choi, Gi-Do;Kim, Jong-Woo
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.15 no.1
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    • pp.87-94
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    • 2016
  • Although studies and investments on electro-magnetic fields in terrestrial areas are being conducted, they are not applied to a ship. Especially ship is consist of Top Side, Bridge, and Engine Room. Top Side is mounted Antenna and radar. Bridge is mounted navigation and navigation equipment that have a safe voyage. Finally, Engine Room is mounted switchboard and this is used to ship propulsion system. Therefore the purpose of this paper is for suggesting optimized standard to apply to marine environment through analyzing electromagnetic wave environment in ship. For this, we were measured EMF in Hanbada ship in Korea Maritime and Ocean University and we compared and analyzed to measured values in Korea standards and international standards. Consequently, Engine Room of ship for the identified that there are limits to apply. The proposed results of this research will be expected to utilize for establishing standard a plan for EMF in ship.

Network Construction Method of Oceanographic Research Vessel for an Efficient Investigation (과학적 탐사를 위한 해양조사선 네트워크 구축방안)

  • 박종원;강준선;임용곤;최영철;김시문;김승근
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2003.10a
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    • pp.172-175
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    • 2003
  • This paper deals with the network interface of research and observation instruments in the oceanographic research vessel with an establishment of related database for measured information. The system is implemented to integrated communication network system which allows to effective survey by using real time observation and GUI(Graphic User Interface). The system also consists of the LAN systems and serial interface to link chemical, physical, biological and environmental relations. And, other network service and vessel data service for data communication between vessel and earth station such as INMARSAT-B, WWW service, BBS, E-Mail etc. are needed for integrated communication network system.

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A study on the EMF strength standard in propulsion system on ship (선내 추진시스템에 대한 전자파 강도기준 연구)

  • Choi, Gi-Do;Kim, Jong-Woo;Cho, Hyung-Rae
    • Journal of Advanced Marine Engineering and Technology
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    • v.39 no.9
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    • pp.929-934
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    • 2015
  • Because of the recent rapid advances in the development of ships with a larger proportion of electrical and electronic equipment, The usable frequency spread spectrum on ships is global trend. Therefore, concerns have been raised regarding the possible hazardous health effects of electromagnetic fields radiating from electronic devices. Although studies and investments on electro-magnetic fields in terrestrial areas are being conducted, they are not applied to a ship. In this paper, we measured electromagnetic fields in ship propulsion systems, and we analyzed the measured values against Korean and international standards. While the measured results satisfied the Korean standard, the Italian standard was not met in the switchboard area. However, the measured values were close to meeting the Italian standard. Therefore, further studies should be conducted for performing a comparative analysis of data in order to specify a standard of electromagnetic fields in propulsion systems that can be applied in the construction of government infrastructures.

Development of evaluation program for vibration characteristics of onboard machinery with resilient mountings (선내 탑재 장비용 마운팅 시스템의 진동특성 평가 프로그램 개발)

  • Kim, Kuk-Su;Choi, Su-Hyun;Baek, Il-Cuk;Cho, Yeon;Kim, Byoung-Gon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2001.05a
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    • pp.155-160
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    • 2001
  • This study is performed to evaluate and design the vibration characteristics of the onboard machinery with resilient mountings. To reduce the vibration level of onboard machinery with resilient mountings, it is important to evaluate and, if necessary, modify the vibration characteristics of the resilient mountings. In this study, we have developed a program to calculate natural frequencies of the machinery with resilient mountings, forced vibration levels due to internal excitation force of the machinery itself and external excitation forces. of the main engine and the propeller. and the force and motion transmissibility of the resilient mountings. The developed program is also able to be applied to optimal design of the resilient mountings for obtaining a target natural frequency and for achieving a minimum forced vibration level at the center of gravity of the machinery.

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An Experimental Study on the Dynamic Characteristics of Onboard Machinery with Resilient Mounts (선내 탑재 마운팅 장비의 동특성에 관한 실험적 연구)

  • 김극수;최수현
    • Journal of the Society of Naval Architects of Korea
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    • v.40 no.2
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    • pp.28-33
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    • 2003
  • This study is performed to evaluate and design the dynamic characteristics of the onboard machinery with resilient mounts. To avoid resonance with onboard machinery and external force, it is necessary to calculate natural frequencies of the resilient mounting system more accurately. Natural frequencies of on board machinery are determined by rigid body properties(mass, moment of inertia, center of mass) of machinery and stiffness of mounts. But it is very difficult to calculate rigid body properties theoretically. And stiffness properties of rubber mounts vary with dynamic displacement, pre load, frequency and temperature, and so on. In this study, we have identified rigid body properties using experimental modal analysis and estimated dynamic stiffness of rubber mount for onboard machinery using measured vibration response during seatrial. We measured displacement excitation through deck under mounts and evaluated relationship between modes of resilient mounting system and main excitation sources of a ship.