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This paper presents finite element algorithms and dynamic analysis of the jacket type offshore structure under water wave and wind impact by using stoke’s second order wave theory. The result of the paper is the scientific basis for the calculation, design and selection of the appropriate parameters, the study contributes to the optimization of ...

9 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 751 | Lượt tải: 0

This paper presented the combination of the nearest neighbor comparison, previously used within unconstrained optimization, and the # constrained method for handling constraints and proposed the #DE-NNC for constrained engineering design problem. The performance of #DE-NNC was evaluated by five widely used engineering benchmark design problems. It...

13 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 674 | Lượt tải: 0

The method of equivalent linearization is one of effective tools in solving random vibration problems of mechanical systems. In this study, the modal responses of a simply supported beam subjected to a space-wise and time-wise white noise loading are carried out by the dual criterion of equivalent linearization. Our calculations are restricted i...

14 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 645 | Lượt tải: 0

This paper investigates the free vibration behavior of stiffened FG sandwich plates based on the third order shear deformation and using the finite element method. Two plate configurations, i.e., plate with FG face-sheets and the homogenous core are metal and ceramic, respectively, are considered. The present results are compared to analytical ...

20 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 690 | Lượt tải: 0

The thermal and thermomechanical postbuckling behavior of thick FGM plates resting on elastic foundations with tangentially restrained edges have been analyzed. The analysis reveals that the tangential constraints of boundary edges has extremely sensitive influences on the buckling and postbuckling of FGM plates. Specifically, critical buckling ...

17 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 682 | Lượt tải: 0

The nonlinear response and postbuckling behavior of thick FGM cylindrical panels subjected to thermal, mechanical and thermomechanical loadings have been analyzed. Formulations are based on the higher order shear deformation shell theory taking geometrical nonlinearity, initial imperfection, panel-foundation interaction, tangential edge constrai...

18 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 663 | Lượt tải: 0

In this paper, the influence of a concentrated mass on the natural frequencies of a double-beam consisting of two different simply supported beams is presented. When there is a concentrated mass the natural frequencies of the double-beam change. The changes in natural frequencies depend on the location of the mass and the mode shapes of the dou...

15 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 663 | Lượt tải: 0

This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 107.03-2014.21. We are grateful to Prof. John C. Wells at Ritsumeikan University (Japan) for facilitating our computing resources.

12 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 695 | Lượt tải: 0

A new evolutionary-based optimization is introduced and applied for optimal sizing of truss structures. Computational results obtained from some benchmark truss optimization problems illustrate the efficiency of the proposed algorithm. The convergence rate and computational cost (in terms of structural analyses) are also very competitive with som...

11 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 868 | Lượt tải: 0

The interior ballistic problem for underwater shooting is considered in details in this paper. To work out the dependence of the pressure on the base of the projectile on the combustion of the charge as well as the resistance of the water environment on the projectile motion in the barrel tube are crucial for solving the problem. A software sui...

8 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 731 | Lượt tải: 0