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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 113 for “"Shape optimization"”.
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Shape Optimization of Hydrofoils
… thesis, a genetic algorithm: GA) is employed for shape optimization of hydrofoils for application in a sailing craft. The hydrofoil for a sailing craft should have high lift at lower speeds and low drag at higher speeds. Computations are performed for a hydrofoil in deep water as well as one close …
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Shape optimization of arch dams.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1968.
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Developments in topology and shape optimization
… of three parts: a gradient-based parameter-free shape optimization method; a stress-constrained topology optimization; and a wave tailoring topology optimization. In shape optimization, the independent node movement approach, wherein finite element node coordinates are used directly as design …
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Hydrofoil shape optimization by gradient methods
… and test techniques for the computational optimization of hydrofoil sections and lifting surfaces advancing under a free surface. A mathematical model was developed based on the extension of a two-dimensional potential flow solution to account for three dimensional effects. Prandtl's …
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Shape Optimization of Microfiber Composite Energy Harvesters
… The validated model was used to perform shape optimization so as to obtain the shape of the beam and the patch that harvests the largest voltage. The shape variables were length of the beam (LB), length of the patch (LP), and width of the beam. Optimization reveals that voltage increases …
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PLATE HEAT EXCHANGER IMPROVEMENTS WITH SHAPE OPTIMIZATION
… of PPHXs in the HVAC&R and no research on their optimization is found in literature. The first objective of this thesis is the optimization of PPHXs using four design parameters including their basic geometry parameters using Parallel Parameterized Computational Fluid Dynamics (PPCFD) and …
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Shape optimization theory and applications in hydrodynamics
… control theory are applied to a continuous shape optimization problem for reducing the wave resistance of a submerged body translating at a steady forward velocity well below a free surface. In the latter approach, when the constraint formed by the boundary conditions and the Laplace's …
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Twisted and intermediate eigenvalue problems in shape optimization
L'abstract è presente nell'allegato / the abstract is in the attachment
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Shape optimization of lightweight structures under blast loading
Structural optimization of vehicle components for blast mitigation seeks to counteract the damaging effects of an impulsive threat on occupants and critical components. The strong and urgent need for improved protection from blast events has made blast mitigating component design an active research …
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Variable-topology shape optimization of linear elastic structures
… of an elastic structure is allowed to vary in shape optimization problems. We study the optimal shape design of a two-dimensional elastic continuum for minimum compliance subject to a constraint on the total volume of material without any restrictions on the design topology.
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Shape optimization using a matrix-free Newton method
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Hull Shape Optimization for Wave Resistance Using Panel Method
… a given hull geometry and to optimize it using optimization algorithms are required for achieving better hulls. The resistance is calculated using a panel method for a given hull and the hull geometry is later changed by applying Lackenby's method of longitudinal shift of stations. An …
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Blast mitigation strategies for vehicles using shape optimization methods
… this problem, and the effect of vehicle hull shape on the net impulse loading on the vehicle is analyzed over varying initial blast intensities. Blast mitigation strategies are proposed to minimize blast impact by identifying optimal shapes for the vehicle hull for which net impulse acting on …
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Centrifugal compressor return channel shape optimization using adjoint method
… the construction of an automated gradient-based optimization process using the adjoint method and its application to centrifugal compressor return channel loss reduction. A proper objective function definition and a generalized geometry parametrization and manipulation algorithm were developed, …
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Structural shape optimization of three dimensional finite element models
The thesis presents a three dimensional shape optimization program which analyzes models made up of linear isoparametric elements. The goal of the program is to achieve a near uniform model stress state and thereby to minimize material volume. The algorithm is iterative, and performs two analyses …
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Sensitivity analysis and computational shape optimization for incompressible flows
We consider the optimization of a cost functional defined for a fluid flowing through a channeL Parameters control the shape of an obstruction in the flow, and the strength of the inflow. The problem is discretized using finite elements. Optimization algorithms are considered which use either …
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Particle shape optimization in colloidal clusters for structural colour applications
… with higher sphericity and shows no consistent shape signature differences between the cluster types’ building blocks. The largest discrepancies occur in the smallest cluster sizes, suggesting future work below this range. The use of spherical particles is therefore a robust choice in the …
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Shape Optimization of Supersonic Bodies to Reduce Sonic Boom Signature
… In recent studies, the emphasis has been on shape optimization of supersonic plane to reduce the acoustic signature of sonic boom resulting from the supersonic aircraft at high altitude in cruise flight. Because of the limitations of in-flight testing and cost of laboratory scale testing, CFD …
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