Structural and Multidisciplinary Optimization
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Exact optimal structural layouts for non-self-adjoint problems
Structural and Multidisciplinary Optimization - Tập 5 - Trang 204-206 - 1993
Using optimality criteria for trusses with displacement constraints, a truss layout is optimized for a point load and a given displacement in different directions, with a view to demonstrating some unexpected features of non-self-adjoint problems.
An alternative interpolation scheme for minimum compliance topology optimization
Structural and Multidisciplinary Optimization - Tập 22 - Trang 116-124 - 2014
We consider the discretized zero-one continuum topology optimization problem of finding the optimal distribution of two linearly elastic materials such that compliance is minimized. The geometric complexity of the design is limited using a constraint on the perimeter of the design. A common approach to solve these problems is to relax the zero-one constraints and model the material properties by a......
First-order sequential convex programming using approximate diagonal QP subproblems
Structural and Multidisciplinary Optimization - Tập 45 - Trang 479-488 - 2011
Optimization algorithms based on convex separable approximations for optimal structural design often use reciprocal-like approximations in a dual setting; CONLIN and the method of moving asymptotes (MMA) are well-known examples of such sequential convex programming (SCP) algorithms. We have previously demonstrated that replacement of these nonlinear (reciprocal) approximations by their own second ......
A deep reinforcement learning optimization framework for supercritical airfoil aerodynamic shape design
Structural and Multidisciplinary Optimization - - 2024
In the context of traditional aerodynamic shape optimization design methods, the necessity to re-execute the complete optimization process when the initial shape changes poses significant challenges in engineering applications. These challenges encompass problems like data wastage and restricted ability for experience learning. We propose a policy learning-based optimization method that can automa......
Equivalence of continuum and discrete analytic sensitivity methods for nonlinear differential equations
Structural and Multidisciplinary Optimization - Tập 48 - Trang 1173-1188 - 2013
This paper presents results for the study of equivalence between the total form continuum sensitivity equation (CSE) method and the discrete analytic method of shape design sensitivity analysis. For the discrete analytic method, the sensitivity equations are obtained by taking analytic derivatives of the discretized equilibrium equations with respect to the shape design parameters. For the CSE met......
Layup optimization against buckling of shear panels
Structural and Multidisciplinary Optimization - Tập 3 - Trang 115-120 - 1991
The object of the study was to optimize the shear buckling load of laminated composite plates. The laminates lacked coupling between bending and extension (B
ij=0) but had otherwise arbitrary selection of the ply angle variation through the thickness. The plates were rectangular and either simply supported or clamped on all edges. For orthotropic plates, it was seen that there is only one paramete......
Flow resistance optimization of link lever butterfly valve based on combined surrogate model
Structural and Multidisciplinary Optimization - Tập 64 - Trang 4255-4270 - 2021
Large-diameter link lever butterfly valve is widely used in the transportation and adjustment of fluid media in the marine field. Because the opening and closing process of the link lever butterfly valve is mainly realized by the internal connecting rod mechanism, and it always exists in the fluid domain to affect the flow performance of the valve. It is necessary to optimize the connecting rod me......
Threshold shift method for reliability-based design optimization
Structural and Multidisciplinary Optimization - Tập 60 - Trang 2053-2072 - 2019
We present a novel approach, referred to as the “threshold shift method” (TSM), for reliability-based design optimization (RBDO). The proposed approach is similar in spirit with the sequential optimization and reliability analysis (SORA) method where the RBDO problem is decoupled into an optimization and a reliability analysis problem. However, unlike SORA that utilizes shift vector to shift the d......
Topology optimization using the unsmooth variational topology optimization (UNVARTOP) method: an educational implementation in MATLAB
Structural and Multidisciplinary Optimization - - 2021
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