• Title/Summary/Keyword: 곡가(哭嫁)

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A New Algorithm to Determine Heating Lines for Plate Forming by Line Heating Method (선상가열법에 의한 강판 가공의 가열선 결정 알고리즘)

  • Chang-Doo Jang;Sung-Choon Moon
    • Journal of the Society of Naval Architects of Korea
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    • v.35 no.2
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    • pp.104-113
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    • 1998
  • The line heating method is a popular technique used to form ship hull in shipyards. In order to promote shipbuilding productivity, some researchers have made progress in their studies on automatic fabrication system for plate forming. These researches have, however, focused on heat-induced plate deformation with particular mechanical modelings, and do not yet propose the heating paths applicable to actual plate forming process. In this paper, a new algorithm to determine heating lines is developed to simulate the line heating process. The important feature of this algorithm is that it calculates principal curvatures of deflection difference surface which represents difference between target surface and surface in fabrication. Several trials to typical surface types show its usefulness and good applicability to tactical use.

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Plate Forming Automation System of Steel Plates by Line Heating Method (III) (선상가열법에 의한 강판의 곡가공 자동화 시스템 (III))

  • Lee, Joo-Sung
    • Journal of the Society of Naval Architects of Korea
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    • v.34 no.2
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    • pp.85-89
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    • 1997
  • The development of the algorithm and the computer aided marking data generation system based on it should precede the automation system for plate forming by line heating method. This paper places emphasis on the yard simulation for a real surface model to justify the algorithm and the computer aided marking data generation system which have been already developed. The yard simulation has been carried out according to the generated marking data and the heating condition produced by the developed computer aided system. The practical applicability of the developed computer aided system has been conformed by comparing the results of the computer simulation to the results of the yard simulation. This paper ends with the extension of the developed marking data generation system.

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Plate Forming Automation System of Steel Plates by Line Heating Method(II) (선상가열법에 의한 강판의 곡가공 자동화 시스템(II))

  • Joo-Sung Lee
    • Journal of the Society of Naval Architects of Korea
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    • v.33 no.3
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    • pp.81-93
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    • 1996
  • In this paper reviewed are the past studies on the plate forming and introduced is the computer aided marking data generation system which should precede the automation system for plate forming by line heating method. The developed computer aided marking data generation system has been applied to a real surface which is frequently found in the bow and the stern area of a ship. From its application results, the estimated surface by the present marking data generation system is very close to the given surface and the generated marking data also shows reasonably good agreement with those in the real practice in ship yard at present. shows very good agreement. When the marking data generation system has been complemented through more applications to real surface models, then it can be practically used in the real practice in ship yard.

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Simulation Based Design of an Automated Hull-piece Manufactruing System (선체 외판 자동 생산 시스템의 시뮬레이션 기반 개발)

  • S.J. Sohn;J.G. Shin
    • Journal of the Society of Naval Architects of Korea
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    • v.36 no.4
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    • pp.128-136
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    • 1999
  • This paper suggests a new object-oriented methodology, ESBD(Evolutionary Simulation Based Design), for the development of an automated manufacturing system in shipbuilding. The target system, AHMS(Automated Hull-piece Manufacturing System), is a virtualized and distributed system controlling the manufacturing processes of storing, surface-pretreatment, cutting, 1st and 2nd curvature generation of material plates. The control and product-flow simulation is applied for the real-time product monitoring and product data management(PDM). The prototype system of AHMS also outlines the layout of the new automated factory.

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An Algorithm of Curved Hull Plates Classification for the Curved Hull Plates Forming Process (곡가공 프로세스를 고려한 곡판 분류 알고리즘)

  • Noh, Ja-Ckyou;Shin, Jong-Gye
    • Journal of the Society of Naval Architects of Korea
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    • v.46 no.6
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    • pp.675-687
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    • 2009
  • In general, the forming process of the curved hull plates consists of sub tasks, such as roll bending, line heating, and triangle heating. In order to complement the automated curved hull forming system, it is necessary to develop an algorithm to classify the curved hull plates of a ship into standard shapes with respect to the techniques of forming task, such as the roll bending, the line heating, and the triangle heating. In this paper, the curved hull plates are classified by four standard shapes and the combination of them, or saddle, convex, flat, cylindrical shape, and the combination of them, that are related to the forming tasks necessary to form the shapes. In preprocessing, the Gaussian curvature and the mean curvature at the mid-point of a mesh of modeling surface by Coon's patch are calculated. Then the nearest neighbor method to classify the input plate type is applied. Tests to verify the developed algorithm with sample plates of a real ship data have been performed.

A Study on the Consideration of the Locations of Gyeongju Oksan Gugok and Landscape Interpretation - Focusing on the Arbor of Lee, Jung-Eom's "Oksan Gugok" - (경주 옥산구곡(玉山九曲)의 위치비정과 경관해석 연구 - 이정엄의 「옥산구곡가」를 중심으로 -)

  • Peng, Hong-Xu;Kang, Tai-Ho
    • Journal of the Korean Institute of Traditional Landscape Architecture
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    • v.36 no.3
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    • pp.26-36
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    • 2018
  • This study aims to examine the characteristics of landscape through the analysis of location and the landscape of Gugok while also conducting the empirical study through the literature review, field study, and digital analysis of the Okgung Gugok. Oksan Gugok is a set of songs set in Ogsan Creek(玉山川)or Jagyese Creek(紫溪川, 紫玉山), which flows in front of the Oksan Memorial Hall(李彦迪), which is dedicated to the Lee Eong-jeok (李彦迪). We first ascertained the location and configuration of Oksan Gogok. Second, we confirmed the accurate location of Oksan Gogok by utilizing the digital topographic map of Oksan Gogok which was submitted by Google Earth Pro and Geographic Information Center as well as the length of the longitude of the gravel measured by the Trimble Juno SB GPS. Through the study of the literature and the field investigation, The results of the study are as follows. First, Yi Eonjeok was not a direct composer of Oksan Gugok, nor did he produce "Oksan Gugokha(Music)". Lee Ia-sung(李野淳), the ninth Youngest Son of Tweo-Kye, Hwang Lee, visited the "Oksan Gugokha" in the spring of 1823(Sunjo 23), which was the 270th years after the reign of Yi Eonjeok. At this time, receiving the proposal of Ian Sung, Lee Jung-eom(李鼎儼), Lee Jung-gi(李鼎基), and Lee Jung-byeong(李鼎秉), the descendants of Ian Sung set up a song and created Oksan Gugok Music. And the Essay of Oksan Travel Companions writted by Lee Jung-gi turns out being a crucial data to describe the situation when setting up the Ok-San Gugok. Second, In the majority of cases, Gogok Forest is a forest managed by a Confucian Scholar, not run by ordinary people. The creation of "Oksan Bugok Music" can be regarded as an expression of pride that the descendants of Yi Eonjeok and Lee Hwang, and next generation of several Confucian scholars had inherited traditional Neo-Confucian. Third, Lee Jung-eom's "Oksan Donghaengki" contains a detailed description of the "Oksan Gugokha" process and the process of creating a song. Fourth, We examined the location of one to nine Oksan songs again. In particular, eight songs and nine songs were located at irregular intervals, and eight songs were identified as $36^{\circ}01^{\prime}08.60^{{\prime}{\prime}}N$, $129^{\circ}09^{\prime}31.20^{{\prime}{\prime}}E$. Referring to the ancient kingdom of Taojam, the nine-stringed Sainam was unbiased as a lower rock where the two valleys of the East West congregate. The location was estimated at $36^{\circ}01^{\prime}19.79^{{\prime}{\prime}}N$, $129^{\circ}09^{\prime}30.26^{{\prime}{\prime}}E$. Fifth, The landscape elements and landscapes presented in Lee Jung-eom's "Oksan Gugokha" were divided into form, semantic and climatic elements. As a result, Lee Jung-eom's Cho Young-gwan was able to see the ideal of mountain water and the feeling of being idle in nature as well as the sense of freedom. Sixth, After examining the appearance of the elements and the frequency of the appearance of the landscape, 'water' and 'mountain' were the absolute factors that emphasized the original curved environment at the mouth of Lee Jung-eom. Therefore, there was gugokga can gauge the fresh ideas(神仙思想)and retreat ever(隱居思想). This inherent harmony between the landscape as well as through the mulah any ideas that one with nature and meditation, Confucian tube.

The Research report of ethnic customs in Dong-shan(東山) Yao(瑤) family (중국(中國) 광서성(廣西省) 전주현(全州縣) 동산요족(東山瑤族) 민속문화(民俗文化) 조사(調査) 약보고(略報告))

  • Park, dae-nam;Hyun, chang-ju
    • Korean Journal of Heritage: History & Science
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    • v.37
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    • pp.169-211
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    • 2004
  • As for the "Guang-Xi(廣西)", "Dong-Shan(東山)", "Yao-Ju(瑤族)", folklore culture to achieve the substratum (New Year manners and customs, a passage rites, folk belief, dwelling folklore, agriculture and a farming machine) generally very received an influence of "Han-zu(漢族)" for the reason that an interchange was active early with "Han-zu(漢族)". However, a traditional form of "Yao-Ju(瑤族)" is covered the base with. Even if it is a national holiday commemorateing the birth of the "Pan-Gu(盤古)" which is ancestors of all "Yao-zu(瑤族)" during New Year manners and customs, songs as "ku-jia(哭嫁)" consisting at the time of marriage during a lot of ritual, "zhaoxu-hun (招婿婚)" and the "liangtou-che(兩頭扯)" marriages which are a classic marriage of "Yao-zu(瑤族)", a ritual format, master "Shi-Gong(師公)" of faith of "Yao-zu(瑤族)" are. Also, a difference is in dwelling folklore related to construction or this very much in "Han-zu(漢族)" and the various sides. It is the part where toilets to use are quite different from the Korean race in a tool, the outside written with the dwelling formal characteristics that are structure, "the ceremony of putting up the ridge beam" in, for example, two folds. Agriculture and a farming machine are basically similar to it of the Korean race, but it is a degree with some transformation by environment and the local cause.

An Experimental Study of Characteristics of Plate Deformation by Heating Process (열간가공에 의한 판의 변형특성에 관한 실험적 연구)

  • Chang-Doo Jang;Dae-Eun Ko;Byeong-Il Kim;Jeong-Ung Park
    • Journal of the Society of Naval Architects of Korea
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    • v.38 no.2
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    • pp.62-70
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    • 2001
  • As the ship hull is a compound-curved structure, plate bending process is indispensible. The process includes press bending process for forming major 1st curvature and heating process for forming the rest curvature. Especially the heating process that is above 50 percents of entire bending work is carried out exclusively by skillful workers. Many researches have been made to automate the heating process but most of these are about line heating process and researches for triangle heating process are rare. This study is a fundamental study to develop a efficient analysis method for triangle heating and focused on clarifying the deformation characteristics of plate by triangle heating. In this paper, we carried out heating experiments and analysed the deformation characteristics of plate to explain the deformation characteristics of plates rationally by showing the phase transformed high temperature region. Also we investigated the heating effect on the hull material properties by mechanical tests.

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