Optimization of geometric shape of Xiamen arch dam

Zhang, Xiaofei; Li, Shouyi; Chen, Yaolong

doi:10.1016/j.advengsoft.2008.03.013

Cited by 17 publications

(5 citation statements)

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“…It is observed that the optimal design is thinner than the initial design and slope of overhang in upstream and downstream of surfaces in the optimum design are smaller than those of the initial design, which are bene ts for construction [34].…”

Section: Resultsmentioning

confidence: 95%

The Shape Optimization of concrete arch dams considering stage construction

2016

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Abstract. This paper describes a methodology to develop the interface between a nite element software and optimization algorithm for optimization of concrete high arch dams. The objective function is the volume of the dam. The numbers of design variables are 31 including the thickness and upstream pro le of crown cantilever, thickness of the left and right abutments, radius of curvature of water and air faces left and right by use of polynomial curve tting and cubic spline function. The constraint conditions are the geometric shape, stress, and the stability against sliding. Initially, a program is developed in MATLAB in order to generate the coordinates of nodes; then, nite element software ANSYS is taken for modeling the geometry of dam. Finally, the optimization technique is performed by Simultaneous Perturbation Stochastic Approximation algorithm. To include dead weight of dam body, stage construction is considered. The proposed method is applied successfully to an arch dam and good results are achieved. The results indicate that the concrete volume of the optimized dam is reduced by an average of 21%. Compared with the initial shape, the time of convergence in this method is very short and the method is fairly e ective. It can be applied to practical engineering design.

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Section: Resultsmentioning

confidence: 95%

The Shape Optimization of concrete arch dams considering stage construction

2016

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“…There are many optimization methods in recent years, such as complex method [2][3] , generalized multiplier method, general reduced gradient method, and sequential quadratic programming method (SQP method) [4][5] .…”

Section: Introductionmentioning

confidence: 99%

Shape Optimization for Arch Dam with Sequential Quadratic Programming Method

Duan

Yuan

Liu

2014

AMM

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The sequential quadratic programming method is introduced in arch dam shape optimization design. In the optimization computation, the arch dam volume is taken as objective function, and the calculation is realized by automatically considering loading process, equivalent stress computation and simulation of shape optimization for arch dam based on FEM. A parabola arch dam is used as a numerical example. The result shows that the optimized figure is much safer and more practical, which indicates that the SQP method is an effective way for optimization design of arch dam shape.

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“…The PANI composites containing Fe 3 O 4 nanoparticles are mostly studied for their electrical and magnetic characteristics. Among magnetic materials, the spinel ferrites exhibit remarkable magnetic properties particularly in radiofrequency region, physical flexibility, high electrical resistivity, mechanical hardness, and chemical stability 12. Their properties are particularly enhanced when the size of the particles reaches the nanometer range 13.…”

Section: Introductionmentioning

confidence: 99%

Preparation, structural, and electrical studies of polyaniline/ZnFe₂O₄ nanocomposites

Prasanna

Jayanna

Prasad

2011

J of Applied Polymer Sci

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Polyaniline/ZnFe 2 O 4 nanocomposites were synthesized by a simple and inexpensive one-step in situ polymerization method in the presence of ZnFe 2 O 4 nanoparticles. The structural, morphological, and electrical properties of the samples were characterized by wide angle X-ray diffraction (WAXD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). WAXD and SEM revealed the formation of polyaniline/ZnFe 2 O 4 nanocomposites. Infrared spectroscopy indicated that there was some interaction between the ZnFe 2 O 4 nanoparticles and polyaniline. The dc electrical conductivity measurements were carried in the temperature range of 80 to 300 K. With increase in the doping concentration of ZnFe 2 O 4 , the conductivity of the nanocomposites found to be decreasing from 5.15 to 0.92 Scm À1 and the temperature dependent resistivity follows ln q(T) $ T À1/2 behavior. The nanocomposites (80 wt % of ZnFe 2 O 4 ) show a more negative magnetoresistance compared with that of pure polyaniline (PANI). These results suggest that the interaction between the polymer matrix PANI and zinc nanoparticles take place in these nanocomposites.

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Optimization of geometric shape of Xiamen arch dam

Cited by 17 publications

References 1 publication

The Shape Optimization of concrete arch dams considering stage construction

The Shape Optimization of concrete arch dams considering stage construction

Shape Optimization for Arch Dam with Sequential Quadratic Programming Method

Preparation, structural, and electrical studies of polyaniline/ZnFe₂O₄ nanocomposites

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Optimization of geometric shape of Xiamen arch dam

Cited by 17 publications

References 1 publication

The Shape Optimization of concrete arch dams considering stage construction

The Shape Optimization of concrete arch dams considering stage construction

Shape Optimization for Arch Dam with Sequential Quadratic Programming Method

Preparation, structural, and electrical studies of polyaniline/ZnFe2O4 nanocomposites

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Preparation, structural, and electrical studies of polyaniline/ZnFe₂O₄ nanocomposites