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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 20, Issue 4 - Dec 2015
Volume 20, Issue 3 - Sep 2015
Volume 20, Issue 2 - Jun 2015
Volume 20, Issue 1 - Mar 2015
Selecting the target year
Methodology for Generating Information Requirements for BIM-based Building Permit Process
Kim, Karam ; Yu, Jungho ; Kim, Inhan ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 1~10
DOI : 10.7315/CADCAM.2015.001
Using BIM (Building Information Modeling)-based design information to analyze various engineering processes has been widely adopted in construction projects. However, since typical building permit processes often require traditional 2D-based design information for submission and to obtain building approval, there are some challenges in delivering such data thru BIM-based design information. This paper proposed a methodology to generate and meet information requirements for permit applications and approvals based on BIM-based design information. To that end, we analyzed the required information necessary to make submissions for building approvals using the Seumter system. We then suggested a process to collect the required information from BIM-based data, and classified this into two types: BIM-internal and BIM-external information requirements. In addition, we proposed three algorithms to extract and to match between extracted BIM data and BIM-internal information requirements using IFC(Industry Foundation Classes). The proposed methodology enables to ensure the efficiency and the accuracy when providing data for building permit review and approval.
A Study on Domestic Standard Parameter Setting for BIM-based Energy Performance Evaluation - Focused on Possession Area per Person of Occupants in Government Offices -
Lee, Yun-Jeong ; Lee, Kweon-Hyoung ; Kim, In-Han ; Choo, Seung-Yeon ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 11~21
DOI : 10.7315/CADCAM.2015.011
Currently, the United States, the United Kingdom, Australia etc. are actively utilizing energy simulation for efficiency evaluation of building energy. However, domestic energy efficiency assessment system doesn`t use energy simulation system properly at present: parameters based architecture plans and Ashrae Standard are inputted for the evaluation, because the input parameters for the simulation haven`t been established yet. This fact causes poor reliability during energy simulation, as the values of the two standards are different from each other. Therefore, the aim of the study is to set domestic standard parameter for BIM-based energy performance evaluation, focusing on possession area per person of occupants at government office in Korea. We found that the difference among the result values occurred approximately 3% in the energy simulation. As a result of the analysis, possession area per person of occupants in Government office is
. Other input parameters may be set based on this. This will increase the reliability of energy simulation through a domestic standard parameter.
BIM Clash Quality Control by Expert System
Kwon, Ocheol ; Cho, Joowon ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 22~35
DOI : 10.7315/CADCAM.2015.022
As BIM in the construction industry has been activated, the building information reliability - design quality is getting important. Meanwhile, it is still difficult to reflect the quality control experience to the modelling since the current methods are strongly rely on a certain BIM tools or systems with formal logics and limited information for quality checking. Therefore, the checking results may contain a lot of issues unrelated or unnecessary to the BIM qualities. In order to overcome this problem, we firstly performed clash check using a conventional checking tool and secondly interpret the results by an Expert System to filter out more meaningful results. We found this study gave a confirmation that it is possible to improve clash quality control when we link the expert experience to the rule-based automatic checking system.
A Study on the Reliability Verification of Availability Simulation for Complex Plant
Lee, Hongcheol ; Hwang, Inju ; Lee, Hyundong ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 36~43
DOI : 10.7315/CADCAM.2015.036
Recently, a number of evaluation studies on availability of plant were carried out. This study was conducted to verify of the reliability of a simulation with some variable such as configuration of process, failure probability density function and the number of iteration times for the natural gas liquefaction plant. The error rate of the KICT-RAM solution was evaluated as 0.03~1.79% compared with the result of the MAROS(commercial solution). And the error-rate change was observed in the range of 0.03~1.75 on the condition of the iteration times as 30, 100, 250. As a result the plant availability evaluation approach of KICT-RAM solution was verified as reasonable. However, the careful approach was required to use the solution because the error-rate increased according to iteration times change.
Differential Operators on a Triangular Mesh and Their Applications
Baek, Seung-Yeob ; Kam, Dong-Uk ; Lee, Kunwoo ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 44~54
DOI : 10.7315/CADCAM.2015.044
Solving partial differential equations (PDEs) on a manifold setting is frequently faced problem in CAD, CAM and CAE. However, unlikely to a regular grid, solutions for those problems on a triangular mesh are not available in general, as there are no well-established intrinsic differential operators. Considering that a triangular mesh is a powerful tool for representing a highly-complicated geometry, this problem must be tackled for improving the capabilities of many geometry processing algorithms. In this paper, we introduce mathematically well-defined differential operators on a triangular mesh setup, and show some examples of their applications. Through this, it is expected that many CAD/CAM/CAE application will be benefited, as it provides a mathematically rigorous solution for a PDE problem which was not available before.
A Study on the Visualization of the Earthquake Information in AR Environments
Bae, Seonghun ; Jung, Gichul ; Kim, EunHee ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 55~64
DOI : 10.7315/CADCAM.2015.055
The earthquake is a natural disaster causing loss of life or property damage and happens more often in Korea recently. Moreover, considering the increase of massive buildings, it is required to predict and visualize the information of the vibration in a building. In this paper, we developed a prototype framework to visualize the displacement information in the AR environments. In order to avoid the irregular halts of the scene and the unnatural distortion of the object, this framework uses the synchronization method at the scene update time and the interpolation of the sensor data for the displacement of vertices. In addition, we studied displacement estimation methods with the acceleration data to extend this framework to the system with accelerators.
User-friendly Web-based ezSIM Platform Development for SMBs
Yoon, Tae Ho ; Park, Hyungwook ; Sohn, Ilyoup ; Hwang, Jae Soon ; Seo, Dongwoo ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 65~74
DOI : 10.7315/CADCAM.2015.065
Structure and/or fluid analysis is gradually increased by an essential design process in the small and medium-sized businesses (SMBs) because of the needs for a rapid design process and the certification about the supplement of the parts by the large business (LB). In this paper, we developed the web-based ezSIM platform installed in the resources integrated system server. The ezSIM platform is based on the heterogeneous linux and windows operating system for the user-friendly connection with the part of the analysis for the SMBs. The procedure of the structure/fluid analysis service module using the public software and the license-free open code in the ezSIM platform was explained. The convenience of the ezSIM platform service was presented by the reaction rate of the graphic motion compared with that of a local PC and the solving and pre-post processing interface compared with that of the KISTI supercomputer. The web-based ezSIM platform service was identified as a useful and essential platform to the SMBs for the usage of the structure and/or fluid analysis procedure.
Modeling and Simulation of HMI Behaviors of 3D Virtual Products using XML
Jung, Ho-Kyun ; Park, Hyungjun ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 75~83
DOI : 10.7315/CADCAM.2015.075
In the virtual prototyping (VP) of digital products, it is important to provide the people involved in product development with the visualization and interaction of the products, and the simulation of their human machine interaction (HMI) behaviors in interactive 3D virtual environments. Especially, for the HMI behavior simulation, it is necessary to represent them properly and to play them back effectively according to user interaction in the virtual environments. In a conventional approach to HMI behavior simulation, user interface (UI) designers use UI design software tools to generate the HMI behavior of a digital product of interest. Due to lack of reusability of the HMI behavior, VP developers need to analyze and integrate it into a VP system for its simulation in a 3D virtual environment. As this approach hinders the effective communication between the UI designers and the VP developers, it is easy to create errors and thereby it takes significant time and effort especially when it is required to represent the HMI behavior to the finest level of detail. In order to overcome the shortcomings of the conventional approach, we propose an approach for representing the HMI behavior of a digital product using XML (eXtensible Markup Language) and for reusing it to perform the HMI behavior simulation in 3D virtual environments. Based on the approach, a VP system has been developed and applied for the design evaluation of various products. A case study about the design evaluation is given to show the usefulness of the proposed approach.
A Study on the Method for Dynamic Response Analysis in Frequency Domain of an Offshore Wind Turbine by Linearization of Equations of Motion for Multibody
Ku, Namkug ; Roh, Myung-Il ; Ha, Sol ; Shin, Hyun-Kyoung ;
Korean Journal of Computational Design and Engineering, volume 20, issue 1, 2015, Pages 84~92
DOI : 10.7315/CADCAM.2015.084
In this study, we describe a method to analysis dynamic behavior of an offshore wind turbine in the frequency domain and expected effects of the method. An offshore wind turbine, which is composed of platform, tower, nacelle, hubs, and blades, can be considered as multibody systems. In general, the dynamic analysis of multibody systems are carried out in the time domain, because the equations of motion derived based on the multibody dynamics are generally nonlinear differential equations. However, analyzing the dynamic behavior in time domain takes longer than in frequency domain. In this study, therefore, we describe how to analysis the system multibody systems in the frequency domain. For the frequency domain analysis, the non-linear differential equations are linearized using total derivative and Taylor series expansions, and then the linearized equations are solved in time domain. This method was applied to analysis of double pendulum system for the verification of its effectiveness, and the equations of motion for the offshore wind turbine was derived with assuming that the wind turbine is rigid multibody systems. Using this method, the dynamic behavior analysis of the offshore wind turbine can be expected to take less time.