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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Computational Design and Engineering
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Journal DOI :
Society of CAD/CAM Engineers
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Volume & Issues
Volume 17, Issue 6 - Dec 2012
Volume 17, Issue 5 - Oct 2012
Volume 17, Issue 4 - Aug 2012
Volume 17, Issue 3 - Jun 2012
Volume 17, Issue 2 - Apr 2012
Volume 17, Issue 1 - Feb 2012
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A Method for Determining a Ship Economic Route based on the Acquisition of the Sea State and Estimation of Fuel Consumption
Roh, Myung-Il ;
Korean Journal of Computational Design and Engineering, volume 17, issue 2, 2012, Pages 71~78
DOI : 10.7315/CADCAM.2012.071
Recently, the ratio of fuel cost to the operational cost of a ship is increasing according to the increase of the international oil price. Thus, many studies are being made to reduce the cost; for example, a method for acquiring the sea state information, a method for estimating fuel consumption, a method for determining the ship`s optimal route, and so on. However, these studies were not incorporated together and being independently made in different fields. In this study, by improving and incorporating such studies, a method for determining a ship economic route based on the acquisition of the sea state and estimation of fuel consumption was proposed. To evaluate the applicability of the proposed method, it was applied to an optimal routing problem of the ocean area including many islands. The result shows that the proposed method can yield the economic route minimizing fuel consumption.
Research on Ontology-based Task Adaptability Improvement for Digital Human Model
Kang, Su-Ho ; Sohn, My-E ;
Korean Journal of Computational Design and Engineering, volume 17, issue 2, 2012, Pages 79~90
DOI : 10.7315/CADCAM.2012.079
In digital virtual manufacturing simulation, Digital Human widely used to optimal workplace design, enhancing worker safety in the workplace, and improving product quality. However, the case of ergonomics simulation solutions to support digital human modeling, Optimal DHM (Digital Human Model) data needed to develop and perform DHM will collect information related to the production process. So simulation developer has burden of collecting information. In this study, to overcome the limitations of existing solutions, we proposed the ADAGIO(Automated Digital humAn model development for General assembly usIng Ontology) framework. The ADAGIO framework was developed for DHM ontology to support optimal deployment of digital virtual environment and in order to ensure consistency of simulation components that are required for simulation modeling was made of a library.
A Development of Casting Design Automation Framework
Cho, Won-Chul ; Kim, Sung-Min ; Nyamsuren, Purevdorj ; Sohn, Jung-Woo ; Lee, Soo-Hong ;
Korean Journal of Computational Design and Engineering, volume 17, issue 2, 2012, Pages 91~96
DOI : 10.7315/CADCAM.2012.091
Use of casting simulation software, analyzing the reason for defect became easy. However, to create a practical solution, experienced casting expert`s knowledge is always indispensable. In this study, we develop casting design automation system and the algorithm based on casting expert`s knowledge, so that faster and more accurate design is enabled. Especially, to generate runner which can be shaped in numerous ways, we suggest the `nexus` method to shape runner system.
A Study on Data Pre-filtering Methods for Fault Diagnosis
Lee, Yang-Ji ; Kim, Duck-Young ; Hwang, Min-Soon ; Cheong, Young-Soo ;
Korean Journal of Computational Design and Engineering, volume 17, issue 2, 2012, Pages 97~110
DOI : 10.7315/CADCAM.2012.097
High performance sensors and modern data logging technology with real-time telemetry facilitate system fault diagnosis in a very precise manner. Fault detection, isolation and identification in fault diagnosis systems are typical steps to analyze the root cause of failures. This systematic failure analysis provides not only useful clues to rectify the abnormal behaviors of a system, but also key information to redesign the current system for retrofit. The main barriers to effective failure analysis are: (i) the gathered data (event) logs are too large in general, and further (ii) they usually contain noise and redundant data that make precise analysis difficult. This paper therefore applies suitable pre-processing techniques to data reduction and feature extraction, and then converts the reduced data log into a new format of event sequence information. Finally the event sequence information is decoded to investigate the correlation between specific event patterns and various system faults. The efficiency of the developed pre-filtering procedure is examined with a terminal box data log of a marine diesel engine.
Discrete Event Simulation for the Initial Capacity Estimation of Shipyard Based on the Master Production Schedule
Kim, Kwang-Sik ; Hwang, Ho-Jin ; Lee, Jang-Hyun ;
Korean Journal of Computational Design and Engineering, volume 17, issue 2, 2012, Pages 111~122
DOI : 10.7315/CADCAM.2012.111
Capacity planning plays an important role not only for master production plan but also for facility or layout design in shipbuilding. Product work breakdown structure, attributes of production resources, and production method or process data are associated in order to make the discrete event simulation model of shipyard layout plan. The production amount of each process and the process time is assumed to be stochastic. Based on the stochastic discrete event simulation model, the production capacity of each facility in shipyard is estimated. The stochastic model of product arrival time, process time and transferring time is introduced for each process. Also, the production capacity is estimated for the assumed master production schedule.
Development of Pre- and Post-processing System for Supercomputing-based Large-scale Structural Analysis
Kim, Jae-Sung ; Lee, Sang-Min ; Lee, Jae-Yeol ; Jeong, Hee-Seok ; Lee, Seung-Min ;
Korean Journal of Computational Design and Engineering, volume 17, issue 2, 2012, Pages 123~131
DOI : 10.7315/CADCAM.2012.123
The requirements for computational resources to perform the structural analysis are increasing rapidly. The size of the current analysis problems that are required from practical industry is typically large-scale with more than millions degrees of freedom (DOFs). These large-scale analysis problems result in the requirements of high-performance analysis codes as well as hardware systems such as supercomputer systems or cluster systems. In this paper, the pre- and post-processing system for supercomputing based large-scale structural analysis is presented. The proposed system has 3-tier architecture and three main components; geometry viewer, pre-/post-processor and supercomputing manager. To analyze large-scale problems, the ADVENTURE solid solver was adopted as a general-purpose finite element solver and the supercomputer named `tachyon` was adopted as a parallel computational platform. The problem solving performance and scalability of this structural analysis system is demonstrated by illustrative examples with different sizes of degrees of freedom.
Efficient Simplification of a Height Map
Park, Sang-Chul ; Kim, Jung-Hoon ; Chung, Yong-Ho ;
Korean Journal of Computational Design and Engineering, volume 17, issue 2, 2012, Pages 132~139
DOI : 10.7315/CADCAM.2012.132
Presented in the paper is a procedure to extract simplified triangular mesh from a height map (terrain data). The proposed algorithm works directly on a height map that extracts a simplified triangular mesh. For the simplification, the paper employs an iterative method of edge contractions. To determine an edge to be contracted, the contraction cost of an edge is evaluated through the QEM method. Normally, an edge contraction will remove two triangles sharing the edge. Although the edge contraction can be implemented easily on a triangular mesh, it is not viable to implement the operation on a height map due to the irregular topology. To handle the irregular topology during the simplification procedure, a new algorithm is introduced.
A Fundamental Study on Applying BIM to Power Manage System of Super Tall Buildings
Jo, Chan-Won ; Kwon, Soon-Ho ; Lee, Woon-Jae ; Roh, Tae-Im ; Ock, Jong-Ho ;
Korean Journal of Computational Design and Engineering, volume 17, issue 2, 2012, Pages 140~148
DOI : 10.7315/CADCAM.2012.140
This study aims to provide power monitoring system for super tall buildings with 3D BIM (Building Information Modeling) technology. In order to realize this subject, standard specifications for BIM objects and attributes were studied through analyzing processes and elements of electrical utilities for power management systems applied for super tall buildings. These standard BIM specifications could be used by designers, contractors and facility operators, and thus could be helpful to realize BIM information sharing between multiple disciplines and construction phases. And further study has been suggested to develop standard specification and applications from this study.