Structural health monitoring of layered structure by the frequency response functions of layers

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K03946
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 20010:Mechanics and mechatronics-related
• Research Institution: Toyohashi University of Technology
• Principal Investigator: Kawamura Shozo 豊橋技術科学大学, 工学(系)研究科(研究院), 教授 (00204777)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 振動工学 / 健全性評価 / 簡易診断 / 伝達率関数 / 外力同定 / 不規則振動 / モード解析

Outline of Final Research Achievements

Structural health monitoring (SHM) is a very important technology for the realization of a sustainable society.
In this study, we focused on hierarchical structures (such as high-rise buildings) that have a large impact on society if they are damaged. We constructed a SHM method using the transmissibility function and the external force identification method. Furthermore, we developed a method for identifying random excitation force, which is necessary to realize SHM using ambient vibrations. The constructed method was verified through numerical simulations and experiments, and it was confirmed that it is an effective method.

Free Research Field

振動工学

Academic Significance and Societal Importance of the Research Achievements

伝達率関数，外力同定，不規則振動などは複雑な数学的な理論であるが，それを実際の健全性評価に適用するため，数学的な扱いを工学的な考え方に当てはめて解釈し，有効に利用した．この技術が確立されることによって，現存する構造物の健全性評価が，従来とは異なる方法で実施できることになり，持続可能社会の実現に貢献できる．