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CONTROL OF BIFURCATION STRUCTURES USING SHAPE OPTIMIZATION

delete2022-01-05
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OA
AI
N
Nicolas Boullé *
P
Patrick E. Farrell
A
Alberto Paganini
DOI:10.1137/21M1418708delete
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摘要

摘要

En 中文
Many problems in engineering can be understood as controlling the bifurcation structure of a given device. For example, one may wish to delay the onset of instability or bring forward a bifurcation to enable rapid switching between states. We propose a numerical technique for controlling the bifurcation diagram of a nonlinear partial differential equation by varying the shape of the domain. Specifically, we are able to delay or advance a given branch point to a target parameter value. The algorithm consists of solving a shape optimization problem constrained by an augmented system of equations, the Moore--Spence system, that characterize the location of the branch points. Numerical experiments on the Allen--Cahn, Navier--Stokes, and hyperelasticity equations demonstrate the effectiveness of this technique in a wide range of settings.
Keyword:
bifurcation analysis
shape optimization
Moore--Spence system

期刊

SIAM Journal on Scientific Computing 封面图
SIAM Journal on Scientific Computing
IF:
2.6
论文数:
5.1K
被引数:
1.8W

机构

U
university of leicester
学者数:
2.0W
论文数: 1.7W
被引数: 25
U
university of oxford
学者数:
9.8W
论文数: 8.6W
被引数: 137
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