Shape Design by Integrating Shape Optimization with Topology Optimization for Multiobjective Structures. (An Approach Using Homogenization Method-and Traction Method).

Ihara, Hisashi; Shimoda, Masatoshi; Azegami, Hideyuki; Sakurai, Toshiaki

doi:10.1299/kikaia.62.1091

Cited by 8 publications

(1 citation statement)

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“…In topology optimization, errors between the optimized and actually manufactured parts in isosurface extraction frequently occur, although they are not as large as the result in this study. Shape optimization 36,37) is often performed after obtaining an isosurface in the case of static stiffness optimization to compensate for this error. In addition, since level-set optimization 38,39) does not introduce such errors, many studies have been performed to replace the density model.…”

Section: Sj1023-10mentioning

confidence: 99%

Topology optimization of large ultrasonic tools for uniform vibration using density model

Wada

Nakamura

2023

Jpn. J. Appl. Phys.

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The uniform vibration of vibrating tools for ultrasonic welding is important for industrial applications but the design requires considerable know-how due to the nature of the wave phenomena. Topology optimization is a structural optimization technique that achieves the desired objective by controlling the material distribution in the design region including voids. In this study, we propose an objective function that maximizes the amplitude of a specific target point in phase with the input. A uniform vibration is obtained by maximizing the point with the smallest amplitude among multiple target points. Optimization is performed using a commonly used density model, resulting in a vibration distribution with an aligned phase on the output surface. In addition, we perform an eigenvalue analysis of the structure by isosurface extraction to study the frequency error and the deterioration in the uniformity of the assumed vibration mode.

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