• 대한조선학회논문집
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• 제44권2호
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• pp.174-179
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• 2007

The cutting automation of boat's wooden pattern is strongly required to improve the productivity and quality of boats in leisure boat industry. This paper is concerned with the development of wooden pattern machining technology by the machining center. The leisure boat is designed with a 3 dimensional design s/w. The NC cutting data are generated in a CAM s/w and are verified using verification s/w. The cutting forces are monitored to analyse the cutting process. The surface characteristics of machined surface are investigated at various cutting conditions such as spindle speed, feed speed, the cutting direction of wood, and wood material.

• 박물관보존과학
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• 제14권
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• pp.7-12
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• 2013

창녕 비봉리에서 출토된 신석기 시대 나무배 편을 대상으로 PEG 함침처리 후 조습건조를 진행하였다. 칠기나 목기와 같은 소형 수침고목재 유물의 경우에는 진공동결건조법이 가장 많이 적용되고 있으나, 소형 유물에만 적용할 수 있다는 단점이 있다. 따라서 선박과 같은 대형유물의 경우에는 대부분 PEG 처리 후 자연건조를 하고 있으나 장시간의 약제함침이 요구되며, 건조결함이 발생할 위험이 있다. 따라서 본 처리에서는 비봉리 출토 나무배 편 4점을 대상으로 PEG 수용액으로 10%에서 80%까지 단계적으로 함침처리 후 조습건조법을 적용하였다. 또한 조습건조 후 배편의 습도조건별 중량변화를 측정하여 유물의 치수안정성을 확인하였다.

• Journal of Advanced Marine Engineering and Technology
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• 제33권5호
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• pp.762-769
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• 2009

A canoe is one of the most popular boats in leisure on the water. Generally canoe has been built by good wooden strips. And canoe built by FRP is used for business recently. But by the users' demands for good quality and the restriction to environmental pollution the wooden canoes are required for personal and canoe building business. The modern wooden canoes were built by the strip construction method are used typically. However it is not suitable for the mass productivity requires effective resource operations and managements of men, materials, times, and price. On this paper the new construction method, called the piling-up laminated construction method, is studied to building a canoe using the piling-up with the laminated wooden plates gives more productivity than the others. First a canoe with various curved surfaces is designed from 3D design system. And the hull of canoe model is divided horizontally to generating the laminated plates that will be converting real wooden plates available from the market and will be routed by the manufacturing machine. After the simulating and analyzing of piling-up with the laminated plates, the canoe is building with less times, less men, less resources, and lower price than other method, avoid of the requirements of additional building tools. On the next paper the constructing of a real canoe using the manufactured wooden plates will be studied.

• 헤리티지:역사와 과학
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• 제39권
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• pp.5-38
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• 2006

우리나라 고분에서 목관이 출토된 예는 창원 다호리유적과 무녕왕릉, 창녕 송현동고분군 7호분뿐이지만, 일본의 고분시대에는 목관의 외형과 구조 등을 추정 복원할 수 있는 자료가 비교적 풍부한 편이다. 일본 고분시대의 목관은 제작방법에 따라 통나무 내부를 파내어 만든 고발식(刳拔式)과 판재를 결합한 조합식(組合式)으로 분류되며, 형태적으로는 주형, 할죽형(割竹形), 상형(箱形) 등으로 나눌 수 있다. 그리고 상형목관은 관재의 결합방식에 의해 조립식(組立式)과 정부식(釘付式)으로 구분된다. 목관의 수종은 금송재가 전 시기에 걸쳐 차별적인 선택이 이루어졌지만, 고분시대 후기에는 삼나무나 편백나무 등 일상에서 쉽게 구할 수 있는 목재가 사용되기도 한다. 우리나라의 창원 다호리유적와 창녕 송현동고분군 7호분 출토 목관은 제작방법 및 형태에 있어 일본의 고발식목관과 유사하며, 무녕왕릉의 왕 왕비의 관은 일본의 정부식목관 출현에 직접적인 영향을 미친 것으로 인식되고 있다. 창녕 송현동고분군 7호분 목관은 통나무배를 전용한 것으로 일본에서 제기되고 있는 주장(舟葬)과 같이 황천국(黃泉國)으로 가기 위한 수단으로 배를 목관으로 시용하였다는 사후 세계관을 반영한 것이 아니라 녹나무가 가진 방충, 부식억제 효과를 최대한 이용한 실용적인 이유로 판단된다. 창녕지역은 녹나무의 식생지역이 아닌 내륙에 위치하고 있기 때문에 관재로서 녹나무를 확보하기 어려웠을 것이고, 이러한 이유로 부득이하게 기존에 사용하였던 배를 전용할 수밖에 없었던 것이다. 7호분 축조 딩시 시대적 상황을 볼 때, 녹나무는 당시 가야와 활발한 대외교섭이 있었던 왜에서 수입한 것으로 추정된다.

• 수산해양기술연구
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• 제16권1호
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• pp.1-15
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• 1980

An underwater recording system was designed to measure the sound spectra of the underwater noises produced by fishing gears in operation. Recorded were noi~es from three types of fishing gears: an anchovy set net, three anchovy boat seine net and a stern trawlnet. Acoustic analysis were made using a heterodyne analyzer, a digital frequency analyzer and a level recorder. The no;'e produced by the anchovy set net was found in the high frequency region of the onset of ambient noise spectrum with a slope of - 6 dB/octave. Here the ambient noise spectrum is higher, though similar in shape, than Knudsen spectrum, and is attributed to the breaking action of the coastal wave. Measured noise spectra during the fishing operations of the anchovy boat seine nets are attributed to the background noise of the sea in the presence of the fishing vessels. The frequency distribution of the noise was 20~5, 000 Hz in the case of two steel anchovy boat seiners, and 20-3,000 Hz in the case of the wooden anchovy boat seiner. The predominant frequency range was 250~350 Hz and maximum sound pressure level was 122 dB (re $1\muPa$) in the case of the steel boat and ] 17 dB in the case of the wooden boat. The noises produced by the trawl fishing gears are remarkably higher than the background noi~e in the presence of the fishing vessel. The frequency distribution of the noi~e was 20-6,300 Hz. The predominant frequency range was 100~200 Hz and maximum sound pressure level was 137 dB ( re $1\muPa$) . The noise spectra were not so much different from that caused by vibrations of the towing cable and the structure of the ground rope of the trawl net towed in an experimental tank.

• 수산해양교육연구
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• 제12권1호
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• pp.22-82
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• 2000

The ship hull construction materials of fishing boat has changed in order that wooden, steel, and fiber glass reinforced plastic(FRP). The fishing boat made from FRP has increased every year because that materials has proved excellent of the characteries for fishing boats construction members. Recently, FRP tend towards evasion for the pollution of air enviroment. Therefore. the materials of fishing boat construction must be exchanged by another one. Aluminium alloys must be recommended for fishing boats construction mateials because that is light weight and corrosion resisting in the sea water. Regulation of the standard of ship hull construction for aluminium alloys fishing boats did not enact laws in the interior now. Therefore, this regulation was studied by the following items. that is Rudder, Bottom construction, Side hull plate construction, Deck plate construction, piller. Water tight bulkhead, Deep tank, Fish tank, Stern construction, Superstructure, Deck house construction, Hatch, Engine room opening, Hatch opening, Bulwark, Welding and Rivet etc. A study on the regulation will be contributed to enact laws for fishing boat construction of aluminium alloys.

• 수산해양기술연구
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• 제28권4호
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• pp.412-417
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• 1992

In full-speed cruising, the airborne sound pressure levels are measured from 11 small fishing boats operated around Cheju Island. In these measurement, 9 measuring positions are selected in each fishing boats. The results of measurements and analyses are as follows: 1. The sound pressure levels in FRP boats are higher than those in wooden boats. 2. The highest sound pressure level is 112dB(A) at the engine room in C boat, while the lowest one is 72dB(A) at the front deck in K boat. 3. The highest sound pressure level is shown to be in the frequency band less than 500Hz. 4. The highest sound pressure level is shown to be in the frequency band less than 500Hz. 5. Through all 9 positions, the sound pressure levels are higher in B and C boat and lower in E and K boats.

• 대한조선학회지
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• 제7권1호
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• pp.57-78
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• 1970

The Korea inshore fishing boats are the size up to 30G.T., and their construction commonly employs the traditional wide wooden planking. Nevertheless, the hull forms have been developed with chine-type straight-framed sections which give developable surface party, but not on the whole: especially not on the whole portion of the hull are preferable for them. Considering many merits in the boat construction, the author, excluding cases of the FRP construction by hand lay-up or spray-up method and of the ferro-cement construction, finds out no reasons to depart from the chine-type hull forms of a developable surface in future development of their hull forms, too. In this report, the author proposed new designs of the developable hull surface for four typical boats forming the main structure of Korean inshore fishing fleets; 5G.T.-class multi-purpose boat, 10G.T.-class angling and longlining boat, 20G.T.-class drift and gill netters, and 27G.T.-class stow netters, and presented the tank test results on their propulsion resistance. The tank test had two purposes; one is to present the powering schedule of the new designs and the other to investigate the resistance characteristics of this kinds of boat in comparision with those of equivalent round-type boats at operational speed ranges. Between the both types of the boat no material differences in powering are expected. Hence, the author is confident of that saving in the construction cost of the developable hull over that of the round-type boat may result in considerable contribution to the over-all boat economy.

• 수산해양기술연구
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• 제40권1호
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• pp.54-59
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• 2004

최근 개발되고 있는 전자자기 컴퍼스를 이용한 소형어선의 항행자동화시스템을 구축하기 위한 기초 연구로서, 부두에 계류된 선박에서 각종 장비의 가동 시켰을 때 나타나는 컴퍼스 오차 변화를 측정하여 비교 분석한 결과를 요약하면 다음과 같다. 1. 목선에서 85kW의 집어등을 점등하였을 때, 조타용 자기컴퍼스는 7$^{\circ}$편서되었고, 전자자기 컴퍼스는 13$^{\circ}$~16$^{\circ}$ 까지 편서되는 것으로 나타났다. 2. FRP 어선에서 13OkW의 집어등을 점등하였을때, 전자자기 컴퍼스는 19$^{\circ}$~23$^{\circ}$ 까지 편동되는 것으로 나타났다. 3. 강선에서 225kW의 전력으로 각종 장비를 가동 시킬 때, 가동전과 비교하여 컴퍼스 오차의 차분은 조타용 자기 컴퍼스에서는 13$^{\circ}$ 편서되고, 전자자기 컴퍼스는 상갑판에서는 68$^{\circ}$ 편서되었고, 선수루 갑판과 조타실 및 컴퍼스갑판에서는 각각 16$^{\circ}$, 32$^{\circ}$, 20$^{\circ}$ 편동되어 나타났다. 4. 소형어선의 항행자동화시스템에 전자자기 컴퍼스를 활용하기 위해서는 선박내에서 사용하는 각종 장비에 의해 발생하는 컴퍼스 오차를 측정하여 적절하게 수정하여 사용해야 할 것으로 판단된다.

• 수산해양기술연구
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• 제32권1호
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• pp.33-41
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• 1996

In order to obtain the most favourable classification system for fishing gears, the problems in the existing systems were investigated and a new system in which the fishing method was adopted as the criterion of classification and the kinds of fishing gears were obtained by exchanging the word method into gear in the fishing methods classified newly for eliminating the problems was established. The new system to which the actual gears are arranged is as follows ; (1)Harvesting gear \circled1Plucking gears : Clamp, Tong, Wrench, etc. \circled2Sweeping gears : Push net, Coral sweep net, etc. \circled3Dredging gears : Hand dredge net, Boat dredge net, etc. (2)Sticking gears \circled1Shot sticking gears : Spear, Sharp plummet, Harpoon, etc. \circled2Pulled sticking gears : Gaff, Comb, Rake, Hook harrow, Jerking hook, etc. \circled3Left sticking gears : Rip - hook set line. (3)Angling gears \circled1Jerky angling gears (a)Single - jerky angling gears : Hand line, Pole line, etc. (b)Multiple - jerky angling gears : squid hook. \circled2Idly angling gears (a)Set angling gears : Set long line. (b)Drifted angling gears : Drift long line, Drift vertical line, etc. \circled3Dragged angling gears : Troll line. (4)Shelter gears : Eel tube, Webfoot - octopus pot, Octopus pot, etc. (5)Attracting gears : Fishing basket. (6)Cutoff gears : Wall, Screen net, Window net, etc. (7)Guiding gears \circled1Horizontally guiding gears : Triangular set net, Elliptic set net, Rectangular set net, Fish weir, etc. \circled2Vertically guiding gears : Pound net. \circled3Deeply guiding gears : Funnel net. (8)Receiving gears \circled1Jumping - fish receiving gears : Fish - receiving scoop net, Fish - receiving raft, etc. \circled2Drifting - fish receiving gears (a)Set drifting - fish receiving gears : Bamboo screen, Pillar stow net, Long stow net, etc. (b)Movable drifting - fish receiving gears : Stow net. (9)Bagging gears \circled1Drag - bagging gears (a)Bottom - drag bagging gears : Bottom otter trawl, Bottom beam trawl, Bottom pair trawl, etc. (b)Midwater - drag gagging gears : Midwater otter trawl, Midwater pair trawl, etc. (c)Surface - drag gagging gears : Anchovy drag net. \circled2Seine - bagging gears (a)Beach - seine bagging gears : Skimming scoop net, Beach seine, etc. (b)Boat - seine bagging gears : Boat seine, Danish seine, etc. \circled3Drive - bagging gears : Drive - in dustpan net, Inner drive - in net, etc. (10)Surrounding gears \circled1Incomplete surrounding gears : Lampara net, Ring net, etc. \circled2Complete surrounding gears : Purse seine, Round haul net, etc. (11)Covering gears \circled1Drop - type covering gears : Wooden cover, Lantern net, etc. \circled2Spread - type covering gears : Cast net. (12)Lifting gears \circled1Wait - lifting gears : Scoop net, Scrape net, etc. \circled2Gatherable lifting gears : Saury lift net, Anchovy lift net, etc. (13)Adherent gears \circled1Gilling gears (a)Set gilling gears : Bottom gill net, Floating gill net. (b)Drifted gilling gears : Drift gill net. (c)Encircled gilling gears : Encircled gill net. (d)Seine - gilling gears : Seining gill net. (e)Dragged gilling gears : Dragged gill net. \circled2Tangling gears (a)Set tangling gears : Double trammel net, Triple trammel net, etc. (b)Encircled tangling gears : Encircled tangle net. (c)Dragged tangling gears : Dragged tangle net. \circled3Restrainting gears (a)Drifted restrainting gears : Pocket net(Gen - type net). (b)Dragged restrainting gears : Dragged pocket net. (14)Sucking gears : Fish pumps.