TY - JOUR

T1 - An optimal design method regarding large-scale structure using a reduced model by frequency response functions (an optimal method using coupled acoustic-structural system)

AU - Tsurumi, Yasuaki

AU - Nakagawa, Toshiaki

AU - Nishigaki, Hidekazu

AU - Kojima, Yoshio

AU - Yamakawa, Hiroshi

PY - 2003/8

Y1 - 2003/8

N2 - The first paper by authors presented an optimal design method for vibration reduction using additional scalar spring elements. As an advanced work of the previous one, this paper deals with a coupled acoustic-structural system using additional beam elements. First, an analytical sensitivity of the sound pressure level is formulated transforming the dynamic mass matrix of the coupled system into the symmetric matrix. A new-coupled reduction method is also presented based on frequency response functions. Then, an analytical sensitivity with respect to a cross-sectional property of an additional beam element is formulated without using an inverse matrix of the dynamic mass matrix. And, an optimization problem, where the sound pressure level at a target frequency domain as an objective function is formulated and then the methods for sensitivity analysis and optimization are shown with respect to additional beam elements, is formulated. Finally, we demonstrate the effectiveness of the proposed method through the simple numerical example.

AB - The first paper by authors presented an optimal design method for vibration reduction using additional scalar spring elements. As an advanced work of the previous one, this paper deals with a coupled acoustic-structural system using additional beam elements. First, an analytical sensitivity of the sound pressure level is formulated transforming the dynamic mass matrix of the coupled system into the symmetric matrix. A new-coupled reduction method is also presented based on frequency response functions. Then, an analytical sensitivity with respect to a cross-sectional property of an additional beam element is formulated without using an inverse matrix of the dynamic mass matrix. And, an optimization problem, where the sound pressure level at a target frequency domain as an objective function is formulated and then the methods for sensitivity analysis and optimization are shown with respect to additional beam elements, is formulated. Finally, we demonstrate the effectiveness of the proposed method through the simple numerical example.

KW - Coupled acoustic-structural system

KW - Frequency response function

KW - Large-scale structure

KW - Optimal design method

KW - Reduced model

KW - Sensitivity analysis

KW - Structural analysis

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M3 - Article

AN - SCOPUS:0242317318

VL - 69

SP - 2033

EP - 2040

JO - Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

JF - Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

SN - 0387-5024

IS - 8

ER -