Sanghyun Shim, Kwangjin Kim, Sangchul Lee, Sangho Ko, Jayoung Kang, Dongyoung Rew, Gwanghyeok Ju

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 73-74, 2011, DOI:10.3970/icces.2011.019.073

Abstract The aim of this paper is to discuss the main issues related to modeling and simulation of the Korean lunar module. Lunar module usually consists of a rigid platform, attitude control actuators and a fuel tank. For dynamical modeling, we first assumed the lunar module as a rigid body and derived equations of motion by considering allocation of reaction thrusters and reaction wheel assembly(RWA). Fuel sloshing in lunar module and its influence on attitude dynamics are an important issue in the research field of space technology. In order to include the effect of fuel sloshing More >

Sang Jin Kim, Dae Hyun Kim, Du Chan Kim, Jung Min Sohn, Jung KwanSeo, Bong Ju Kim, Jeom Kee Paik, S.N. Atluri

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 71-72, 2011, DOI:10.3970/icces.2011.019.071

Abstract The movement of various cargos is needed due to rise of global container traffics. Ships are ideal vehicles for transportation and have many construction types such as container ship, bulk carrier, oil tanker, and car carrier. Ships like these are serviced all over the world. Ships are subjected to various environmental loads during operation. To sustain these various loads, ships should be designed guaranteeing structural safety and economical efficiency as well.
Stiffened panels consist of plates and supporting members and are commonly used in the ship building and ocean engineering industry. Ship structures are normally… More >

Ju Hye Park, Jeom Kee Paik, S.N. Atluri

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 69-70, 2011, DOI:10.3970/icces.2011.019.069

Abstract The aim of the present paper is to develop a semi-analytical method which and quickly and accurately compute the ultimate strength response of rectangular plates under combined loads and non-uniform lateral pressure. It is assumed that the plating is simply supported at four edges which are kept straight. A unique feature of developed method was found to give reasonably accurate results for practical design purpose in terms of the large deflection analysis of plates under non uniformed lateral pressure. The present paper treated by analytically solving the nonlinear governing differential equations of the elastic large More >

Du Chan Kim, Sang Jin Kim, Jung Kwan Seo, Bong Ju Kim, Jeom Kee Paik, Satya N. Atluri

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 67-68, 2011, DOI:10.3970/icces.2011.019.067

Abstract In offshore plant and FPSO topsides, the probability against fire hazard is existed due to complicated processing such as production, storage and offloading oil and gas. High temperature and heat flux from fire accident cause a serious damage on human, environment and primary structures.
The aim of this study is to analyze behaviors and reduction effect of thermal radiation by various heat shields through computational and experimental method.
In this test, flat plate type, corrugated plate type, perforated plate type and wire mesh type heat shield were used. Heat flux and temperature were measured More >

Dae Kyeom Park, Do Kyun Kim, Dong Hee Park, Bong Ju Kim, Jeom Kee Paik, Satya N. Atluri

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 65-66, 2011, DOI:10.3970/icces.2011.019.065

Abstract The global warming has reduced the extent of ice in Arctic region and brought some environmental issues including the rising of sea level and the changing of ecosystem. On the other hand, it is also true that the possibility of using Arctic sea route by trading ships and of developing the subsea resource in the Arctic region by offshore installations is increasingly growing due to the global warming. There are still a lot of challenging issues to be resolved for robust design of ships and offshore structures operating in Arctic region.
The aims of the… More >

Jeong Hwan Kim, Du Chan Kim, Ju Hye Park, Bong Ju Kim, Jung Kwan Seo, Jeom Kee Paik, Satya N. Atluri

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 63-64, 2011, DOI:10.3970/icces.2011.019.063

Abstract In offshore structures, fire is one of the most important hazardous events. This has been proved by several disasters such as Piper Alpha and Deepwater Horizon accidents. The concern of fires has recently been reflected in rules and quantified risk assessment based design practice. Within the framework of quantified risk assessment and management for offshore installations, therefore, more refined computations of consequences or hazardous action effects due to fire is required.
The aim of the present study is to examine the technologies involved in computations of nonlinear structural analysis of offshore structures subject to temperature More >

Jung Min Sohn, Dae Hyun Kim, Sang Jin Kim, Jung Kwan Seo, Bong Ju Kim, Jeom Kee Paik, Nick Underwood, G.K. Schleyer, Satya N. Atluri

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 61-62, 2011, DOI:10.3970/icces.2011.019.061

Abstract The behavior of structures due to blast loading is conveniently represented with single degree of freedom (SDOF) models. These simplifying models try to evaluate a structure using only one physical degree of freedom, the horizontal deflection. Advantages that still indicate the use of these state-of-practice or common practice models include the quick evaluation for assessment of structures, intuitive transition from static to dynamic models. The aim of this study is to estimate the maximum transient displacement and final (permanent) displacement of corrugated panels subjected to uniformly distributed dynamic loads using LS-DYNA and SDOF. SDOF presents More >

Dong Hee Park, Do Kyun Kim, Han Byul Kim, Jung Kwan Seo, Bong JuKim, Jeom Kee Paik, Satya N. Atluri

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 59-60, 2011, DOI:10.3970/icces.2011.019.059

Abstract The objective of this paper is to develop a simple and accurate prediction method for the ultimate strength calculations of ship hulls subject to vertical bending moments. The method is based on a credible bending stress distribution over the hull cross-section presumed at the ultimate limit state. The accuracy of this method is demonstrated through comparison with computations obtained using more refined methods, such as nonlinear finite element method, intelligent super-size finite element method, and idealized structural unit method. Statistical analysis of the hull girder ultimate strength based on comparisons among the various computations is More >

Hsien-Chie Cheng, Ho-hsiang Huang, Su-Tsai Lu, Wen-Hwa Chen

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 57-58, 2011, DOI:10.3970/icces.2011.019.057

Abstract Due to the strong demand of electronic products with light-weight, flexibility and portability and rollability from consumers, the development of flexible electronics with flexible interconnects is presently underway. Flexible electronics is a technology that extends electronics devices beyond the rigid form factor. It is highly recognized that it can bring a very vigorous drive toward the new flourish of economic growth in the electronics industry.
In the study, a flexible interconnect technology based on an ultra thin chip and a very thin flexible polyimide (PI) circuited substrate is developed, as shown in Fig. 1. The… More >

T.S. Jang, J.S. Park, B.Y. Moon

The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 55-56, 2011, DOI:10.3970/icces.2011.019.055

Abstract This paper is concerned with the numerical investigation of the beam deflection on a nonlinear elastic foundation. Traditionally, the problem of nonlinear beams has usually been examined by utilizing semi-analytical approaches involving the perturbations of small parameters or by such numerical techniques as nonlinear finite element methods. However, in this paper, the nonlinear beam problem is analyzed with the help of a new method proposed by the author (TS Jang): it involves a contraction of Banach fixed point theorem based on a transformed nonlinear integral equation. The proposed method, straightforward to apply, only requires a More >