58 citations · 333 across the 15 of their papers we have counts for
15 papers
Orientation Optimization Based on Topological Derivatives in Cooperation with Multi-Material Topology Optimization Based on Extended Level Set Method
Masaki Noda, Kei Matsushima, Takayuki Yamada
This paper provides an orientation angle optimization method for the design of fiber-reinforced composite materials using topology optimization. The orientation angle optimization…
Level set-based shape optimization of deformable structures for manipulating sound propagation
Yuki Noguchi, Takayuki Yamada
In this paper, we propose a level set-based shape optimization method for acoustic wave propagation problems with a deformable structure. First, we propose a mathematical model for…
Topology optimization method with nonlinear diffusion
Tomoyuki Oka, Takayuki Yamada
This paper is concerned with topology optimization based on a level set method using (doubly) nonlinear diffusion equations. Topology optimization using the level set method is cal…
Level set-based multiscale topology optimization for a thermal cloak design problem using the homogenization method
Makoto Nakagawa, Yuki Noguchi, Kei Matsushima +1
Artificially designed composite materials consist of microstructures, that exhibit various thermal properties depending on their shapes, such as anisotropic thermal conductivity. O…
Two-Phase Topology Optimization for Metamaterials with Negative Poisson's Ratio
Daichi Akamatsu, Yuki Noguchi, Kei Matsushima +3
Although recent developments in 3D printing technology have made it possible to fabricate metamaterials with characteristic mechanical properties, it is not easy to fabricate compl…
Exceptional points in cylindrical elastic media with radiation loss
Kei Matsushima, Yuki Noguchi, Takayuki Yamada
Exceptional points (EPs) are singular points on a parameter space at which some eigenvalues (scattering poles) and their corresponding eigenmodes coalesce. This study shows the exi…
Optimal design of compliant displacement magnification mechanisms using stress-constrained topology optimization based on effective energy
Ken Miyajima, Yuki Noguchi, Takayuki Yamada
In this paper, stress-constrained topology optimization is applied to the design of compliant displacement magnification mechanisms. By formulating the objective function based on…
Nesterov's acceleration for level set-based topology optimization using reaction-diffusion equations
Tomoyuki Oka, Ryota Misawa, Takayuki Yamada
This paper discusses level set-based structural optimization. Level set-based structural optimization is a method used to determine an optimal configuration for minimizing an objec…
A coupled-mode theory for two-dimensional exterior Helmholtz problems based on the Neumann and Dirichlet normal mode expansion
Kei Matsushima, Yuki Noguchi, Takayuki Yamada
This study proposes a novel coupled-mode theory for two-dimensional exterior Helmholtz problems. The proposed approach is based on the separation of the entire space R2 into a fict…
Topology optimization with a closed cavity exclusion constraint for additive manufacturing based on the fictitious physical model approach
Takayuki Yamada, Yuki Noguchi
This paper proposes a topology optimization method that considers the geometric constraint of no closed cavities to improve the effectiveness of additive manufacturing based on the…
Extended level set method: a multiphase representation with perfect symmetric property, and its application to multi material topology optimization
Masaki Noda, Yuki Noguchi, Takayuki Yamada
This paper provides an extended level set (X-LS) based topology optimiza- tion method for multi material design. In the proposed method, each zero level set of a level set function…
Topology optimization for acoustic structures considering viscous and thermal boundary layers using a sequential linearized Navier-Stokes model
Yuki Noguchi, Takayuki Yamada
This study proposes a level set-based topology optimization method for designing acoustic structures with viscous and thermal boundary layers in perspective. Acoustic waves propaga…
Topology optimization of acoustic metasurfaces by using a two-scale homogenization method
Yuki Noguchi, Takayuki Yamada
In this paper, we propose a level set-based topology optimization method for the unit-cell design of acoustic metasurfaces by using a two-scale homogenization method. Based on prev…
Topology optimization considering the distortion in additive manufacturing
Takao Miki, Takayuki Yamada
Additive manufacturing is a free-form manufacturing technique in which parts are built in a layer-by-layer manner. Laser powder bed fusion is one of the popular techniques used to…
Geometric Shape Features Extraction Using a Steady State Partial Differential Equation System
Takayuki Yamada
A unified method for extracting geometric shape features from binary image data using a steady state partial differential equation (PDE) system as a boundary value problem is prese…