• Journal of Welding and Joining
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• v.29 no.3
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• pp.70-75
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• 2011

Welding process generates distortion and residual stress in the weldment due to rapid heating and cooling. Welding distortion and residual stress in the welded structure result in many troubles such as dimensional inaccuracies in assembling and safety problem during service. The accurate prediction of welding residual stress is thus very important to improve the quality of weldment and find the way to reduce itself. This paper presents the simulation of welding-induced residual stress analysis to examine the cause of cracking in the SUS-overlay welding specimen at FPSO Moon Pool structure.

• Journal of Ship and Ocean Technology
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• v.5 no.4
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• pp.1-18
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• 2001

Software written in academic environments is rarely integrated and/or reused. Moreover, typical academic software products do not communicate with commercial CAD packages, consequently functionality that is readily available to industry is not available do academic researchers. The Surface Design Library (SDL) is a library serving as a framework under which, CAGD software, intended for research or educational use, can be written in such a manner that it becomes a reusable part of a useful CAGD system. Moreover SDL is equipped with an IGES translator so that it communicates with commercial CAD packages, This paper gives a brief overview to SDL and presents examples of using it for high quality fairing performed on a naval ship hull, before employing commercial CAD packages for further design and analysis.

• International Journal of Naval Architecture and Ocean Engineering
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• v.7 no.2
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• pp.346-363
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• 2015

We have performed integrated dynamics modeling for a supercavitating vehicle. A 6-DOF equation of motion was constructed by defining the forces and moments acting on the supercavitating body surface that contacted water. The wetted area was obtained by calculating the cavity size and axis. Cavity dynamics were determined to obtain the cavity profile for calculating the wetted area. Subsequently, the forces and moments acting on each wetted part-the cavitator, fins, and vehicle body-were obtained by physical modeling. The planing force-the interaction force between the vehicle transom and cavity wall-was calculated using the apparent mass of the immersed vehicle transom. We integrated each model and constructed an equation of motion for the supercavitating system. We performed numerical simulations using the integrated dynamics model to analyze the characteristics of the supercavitating system and validate the modeling completeness. Our research enables the design of high-quality controllers and optimal supercavitating systems.

• Journal of Korean Association for Spatial Structures
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• v.19 no.1
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• pp.37-44
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• 2019

Yangjindang house, which is located in Sang-ju province of South Korea, is one of the special Hanok structures dated back to Joseon dynasty. This study aims to examine structural safety of the Yangjindang wood frame building considering dynamic parameters such as the natural frequency and damping ratio. The numerical model of the wood frame building is implemented using Midas Gen, especially the wood joint where column and beam were connected. The behavior of the actual frame building was compared with the modeling results. In addition, structure responses such as shear force, axial force, flexural moment and deflections were calculated and compared with the allowable limits. Numerical results show that, generally, despite of some local members shear failure, Yangjindang's structural response does not exceed the limitation according to current standards.

• International Journal of High-Rise Buildings
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• v.8 no.1
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• pp.37-47
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• 2019

Facing the challenges of urban form and space quality in a high-density environment, the paper puts forward the development trend of three-dimensional and multi-functional design for an urban high-rise complex, and analyzes the design methods of establishing an urban landmark, including multi-functional composition, three-dimensional space integration, three-dimensional traffic organization and energy flow programming. Meanwhile, combined with the specific design case of Yiwu World Trade Center, the practical experience of designing a high-rise complex in China's medium-sized cities is analyzed.

• Journal of the Korean housing association
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• v.10 no.4
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• pp.161-174
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• 1999

This study tried to search for solutions of present problems in architecture through interdisciplinary study which includes biology, literature, aesthetics, and psychology, and set up two models composed of the nature and the human perception which contemporary architecture has problems on. By nature-oriented approach through biology and romanticist literature, the five types of organic principles which could be obtained from structure and order in natural system and by human perception-oriented approach through aesthetic theory of Harold Osborne and perceptual and cognitive psychology the structure and order of perceptual arousal, perceptual balance, and perceptual order in human cognition based on perceptual appropriateness could be found. The unified and organic framework of architectural composition must be considered through a deductive and inductive study as this study was approached. The results of the present study can be applied to construct human-oriented design principles and factors in architectural space and form, and better environmental quality.

• The Journal of the Korea Contents Association
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• v.8 no.5
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• pp.82-93
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• 2008

Nowadays, as the importance of SOA-based software is recognized, the market of SOA-based software is getting bigger. In response to this, the requirements about high reliability and quality SOA-based software is getting increased. In this research, we clearly suggested the evaluation method by giving a specific evaluation example to evaluate the quality of SOA-based software. It is expected to raise the objectivity and the utilization by inducing the quality improvement from this research.

• KIEAE Journal
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• v.2 no.1
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• pp.69-76
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• 2002

With rapid industrial development, railway has become a main traffic means. But, the railway noise has caused much annoyance for the residents living nearby railway track. Therefore, it is necessary to establish the environmental Quality criteria for railway noise like the environmental quality criteria for traffic noise. In this study, the domestic and foreign criteria for railway noise were investigated with analysis of existing data and an field survey of noise condition near a railway. Fundamental data are provided for establishment of environmental Quality criteria for railway noise.

• Journal of the Korean Solar Energy Society
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• v.26 no.4
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• pp.83-91
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• 2006

As a demand for sustainable development rises, the preference for earth house (earth construction) increases gradually. However, there are few data for predicting and evaluating the thermal environment and indoor air quality of earth house. Thus, this study aims to measure thermal properties(thermal conductivity, density and specific heat) and pollutants emission intensities(formaldehyde and volatile organic compounds) of current main earth construction materials and make a comparison between earth and cement construction materials. As results, quantitative thermal properties and pollutants emission intensities of current main earth construction materials are shown.

• Korean Institute of Interior Design Journal
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• no.25
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• pp.301-306
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• 2000

The target of this research is the analysis about Santiago Calatravas works in harmony with the dynamics of architectural technology and aesthetics in contemporary architecture. His first design process in works starts from the observation about the from of nature. He expresses the dynamics of architecture through using the Curve freely. His works express the dynamic movement, the quality of the unique inspiration and the rhythmical impression. As both scientist and artist, Calatrava could be called a classical architect and a man of his times simultaneously. Consequently, contemporary architectural designs shall be gradually focused in the dynamics of the technology and aesthetics as Calatravas ones.