Open Access
ABSTRACT
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 the asymptotic solutions may be… More >
Open Access
ABSTRACT
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 the efficiency of the proposed… More >
Open Access
ABSTRACT
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 this program was to reduce… More >
Open Access
ABSTRACT
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 performance of the proposed… More >
Open Access
ABSTRACT
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 coolant and coupled with a… More >
Open Access
ABSTRACT
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 types of pipe-in-pipe systems (compliant… More >
Open Access
ABSTRACT
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 many difficulties in simulating water… More >
Open Access
ABSTRACT
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 space such as the… More >
Open Access
ABSTRACT
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 crack growth length and external… More >
Open Access
ABSTRACT
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 are also fitted to… More >
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