Table of Content
• Open Access

ABSTRACT

A Novel Perturbed Dynamical Method for Solving Singular Systems of Nonlinear Equations

Cheng-Yu Ku, Chein-Shan Liu, Weichung Yeih, Chia-Ming Fan
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 33-34, 2011, DOI:10.3970/icces.2011.019.033
Abstract In this paper, a novel method, named the perturbed dynamical method, is proposed to solve nonlinear systems whose Jacobian matrix is singular. The concept of the proposed method roots from the conventional homotopy method but it takes the advantages of converting a vector function to a scalar function by using the square norm of the vector function to conduct a scalar-based homotopy method. Then, a small parameter, which is similar to the perturbation theory, is introduced to the singular systems of nonlinear equations such that the modified singular systems of nonlinear equations become nonsingular and More >

• Open Access

ABSTRACT

The exponentially convergent scalar homotopy algorithm for solving the nonlinear optimization problems

Chung-Lun Kuo, Chein-Shan Liu, Jiang-Ren Chang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 35-36, 2011, DOI:10.3970/icces.2011.019.035
Abstract In this study, the exponentially convergent scalar homotopy algorithm (ECSHA) is proposed to solve the nonlinear optimization problems under equality and inequality constraints. The Kuhn-Tucker optimality conditions associated with NCP-functions are adopted to transform the nonlinear optimization problems into a set of nonlinear algebraic equations. Then the ECSHA is used to solve the resultant nonlinear equations. The proposed scheme keeps the merit of the conventional homotopy method, such as global convergence, but the inverse of the Jacobian matrix is avoid with the aid of the scalar homotopy function. Several numerical examples are provided to demonstrate More >

• Open Access

ABSTRACT

TRANSPORT COMPOSITE WING BOX TRADE STUDY USING FE TECHNOLOGIES

I.S.Hwang, W.Kang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 37-38, 2011, DOI:10.3970/icces.2011.019.037
Abstract Recently composite materials are widely used in the building of transport airplanes. The first significant application of composite materials in commercial transports was an all composite rudder for A300/310 by Airbus in 1983. In 1985, Airbus introduced a composite vertical tail fin in the same airplanes. With the success of A300/310, Airbus introduced a full composite tail structure for A320. The composite weight of A320 is totaled to 15% of structure weight. In the late of 1970, NASA and major airframe companies such as Boeing, Lockheed, MD started the ACEE program. The main goal of… More >

• Open Access

ABSTRACT

Modeling of moisture diffusion in permeable fiber-reinforced polymer composites using heterogeneous hybrid moisture element method

De-Shin Liu, Zhen-Wei Zhuang, Cho-Liang Chung
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 39-40, 2011, DOI:10.3970/icces.2011.019.039
Abstract A two-dimensional heterogeneous hybrid moisture element method (HHMEM) for modeling transient moisture diffusion in permeable fiber-reinforced polymer composites is proposed in this paper.
The HHMEM scheme is based on a heterogeneous hybrid moisture element (HHME), whose properties are determined by equivalent moisture capacitance and conductance matrixes calculated using the conventional finite element formulation with the similarity mass/stiffness property and matrix condensing operations. A coupled HHME-FE scheme is developed and implemented in computer codes MATLAB to analyze the transient moisture diffusion characteristics of polymeric composite materials containing multiple permeable fibers. The analysis commences by comparing the… More >

• Open Access

ABSTRACT

Design High Speed Spindle Cooling System Using Novel Solid-Fluid Coupling Heat Transfer Computational Scheme

De-Shin Liu, Kuo-Liang Cheng, Zhen-Wei Zhuang, T. C. Lee
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 41-42, 2011, DOI:10.3970/icces.2011.019.041
Abstract High speed spindle is the key component for high precision machine center. The optimum design of spindle cooling system have to achieve to avoid the high heat produce by the build-in motor that can make great damage to the spindle bearing systems. This paper presents a new solid-fluid coupling computing method for design high speed spindle cooling system. Energy equation has been formed for a control volume within the cooling channel to describe the heat absorbing by the coolant moving in a constant speed. Finite different method is applied to solve temperature rising in the More >

• Open Access

ABSTRACT

An overview on research of buckling of subsea pipe-in-pipe system

Duan Menglan, Wang Qin
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 43-44, 2011, DOI:10.3970/icces.2011.019.043
Abstract This paper focuses on the methodologies on strength and buckling of typical submarine pipeline (Pipe-in-pipe system) under high temperature and high pressure (HT/HP) conditions. The internal high pressure and high temperature of oil/gas, external hydraulic pressure in deepwater, variational frictional force of soil, and the complex structure of the PIP system make the equilibrium equation of the subsea pipeline exhibit strong nonlinear performance in such nonlinear boundary conditions. The numerical methods are summarized for solving the nonlinear equations in this paper. The paper also presents evaluation methods for the lateral and upheaval buckling of two More >

• Open Access

ABSTRACT

An improved SPH model for water entry of free falling objects

M. B. Liu, J. R. Shao
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 45-46, 2011, DOI:10.3970/icces.2011.019.045
Abstract Water entry can be frequently observed in daily life and engineering and sciences. Typical examples include the entry of re-entry capsule of spacecrafts and submarine, landing of aircraft on water, and diving of sportsman. The phenomenon of water entry is of significant importance both in theory and practice. Numerical simulation of water entry problems is a formidable task and involves rapid movement and breakup of free surfaces, strong turbulence and vortex and violent fluid-solid interaction. Though conventional grid based methods like FDM, FVM and FEM have achieved greatly in computational fluid dynamics, there are still… More >

• Open Access

ABSTRACT

Research on Methods of Oxigen Delivery Applied in Deep-sea Human Occupied Vehicle(HOV)

Lei Jiang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 47-48, 2011, DOI:10.3970/icces.2011.019.047
Abstract Ocean resources, for which the modern military and economy are competing, are the material sources for sustainable development. In order to keep our own rights in the competition of international resources, the project to develop a deep-sea HOV was started.
In this paper different requirements of O2 concentration in the closed space of various underwater vehicles such as submarine and HOV is introduced. Based on that, from the aspects of power, space size, influence to the environment and O2 concentration the particular demands for delivering O2 are analyzed. Several O2 delivering methods in the closed More >

• Open Access

ABSTRACT

Delamination simulation of composite T-joints for marine application

Li Yong-sheng, Wang Wei-bo
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 49-50, 2011, DOI:10.3970/icces.2011.019.049
Abstract The need to assess the structural capability of marine composite structures that support the T-joints of composite ships has increased due to the rise in the number of accidents and human casualties. In this paper, the delamination behavior of T-joint under out-of-plane load was studied based on the cohesive zone damage model(CZD). Maximum interlaminar stress criterion was used to govern the damage initiation, and a bilinear damage evolution law was adopted to characterize the damage growth. The whole delamination process of T-joint was simulated and stress level after each delamination was characterized. The relationship between More >

• Open Access

ABSTRACT

Development of A New Type of Winch with Steel Armoured Umbilical Cable Used in Submarine Rescue Chamber(SRC) with Mobility

ZHAO Jun-hai, HU Yong, Wang Fang, HOU De-yong
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 51-52, 2011, DOI:10.3970/icces.2011.019.051
Abstract With the number of submarines increasing rapidly, there are many accidents occurred during submarines’s cruising. Especially the universal attentions to submarine rescue are awaken by the Russian Navy’s second-generation strategic nuclear submarine "Kursk" accident.
One of the important means for submarine rescue is SRC. Since 70th last century abroad, Navy’s submarine rescue armies have been equipped with the SRCs. Entering 21th-century, it is necessary for mating exercises between SRC and disabled submarine(DISSUB) chosen still by Navy’s submarine rescue armies in Navy’s large military drills at home and abroad. The dedicated mating platforms for the SRCs… More >

• Open Access

ABSTRACT

The multiscale analysis of polycrystalline metals and its interface with a-Al2O3 under tension

Qin Siwei, Shen SP
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.2, pp. 53-54, 2011, DOI:10.3970/icces.2011.019.053
Abstract Among many multiscale methods ,we choose the quasicontinuum method to understand the mechanical response at the nanocrystalline of grain boundaries(GBs) under tension. The energetic and mechanical strength of 6 i?"<110> symmetric tilt GBs are investigated in nanocrystalline Cu and Ni. We focus on discussing the interaction of the structural units of symmetric tilt GB for the initial deformation mode and the strength of model. At the basis of the previous, We study the nanocrystalline Cu/a-Al2O3 interface and analyze the relationship during the grains orientations, GB energy and interface. Special emphasis is placed on the crystal slip More >

• Open Access

ABSTRACT

A numerical study of nonlinear deflection of a beam on a nonlinear elastic foundation

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 >

• Open Access

ABSTRACT

Hygro-Thermal Behaviors of an ACF-typed Ultra-thin Chip-on-Flex Interconnect Technology

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 >

• Open Access

ABSTRACT

A study on simple and accurate prediction method for ultimate hull girder strength calculation

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 >

• Open Access

ABSTRACT

Nonlinear Structural Behavior of Blast-loaded Corrugated Panels: Analytical and Numerical considerations

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 >

• Open Access

ABSTRACT

A Study on Nonlinear Structural Analysis of Offshore Structures subject to Elevated Temperature due to Fire

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 >

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