考慮輸出量測之結構動態特性識別

Identification of Structural Dynamic Characteristics Using Output-only Measurement

陳彥均(Yen-Chun Chen)

指導教授 ： 羅俊雄

國立臺灣大學/工學院/土木工程學研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.02132

摘要

對於系統識別處理來說，輸入資料的量測是十分困難，有太多的
環境因素包括在裡面，所以只用輸出資料來進行系統是別的量測，已
經成為取代的方法。此篇論文中，提出了幾種輸出資料識別的方法，
並且進一步做下列的分析：考慮輸出量測之結構動態特性識別。
為了進行結構物系統識別，提出KL (Karhunen-Loéve ) 、 SSI
(Stochastic Subspace Identification)、FDD 識別結構物的振態，
進一步分析兩種方法的異同；對於結構物的頻率和組尼比，分別由
general method 、half-power method 、AR modal method 、two
least-squares ARMA modal method， 四種不同的方法識別，並進一
步做頻率與阻尼比的統計分析。
針對集鹿橋做三種案例，可以分別了解此結構物在橫向、縱向
的動態特性情形，並考慮橋面板與鋼索耦合的情形。

關鍵字

輸出量測 ； 系統識別

並列摘要

It is difficult to measure the input for system identification and this is
because there are many factors of .environment. So the output-only is
becoming important for the future. In this thesis, address several
output-only methods and then analysis identification of Structural
Dynamic Characteristics Using Output-only Measurement.
In order to identify the structure system, address two methods, KL
(Karhunen-Loéve ) and SSI (Stochastic Subspace Identification), to
identify the mode and then compare two methods. For the modal
frequency and damping ratio of the structure, there are four methods,
general method 、half-power method 、AR modal method 、two
least-squares ARMA modal method, to identify separately and then
compile statistics the measured data.
In connection with Gi-Lu bridge, we can understand the dynamic
characteristic of longitudinal、transverse and vertical directions and
consider the couple effect of the deck and cable.

並列關鍵字

output-only ； ID

參考文獻

Proc. International Society for Optical Engineering (SPIE)

辜琪媜(2005) “利用小波轉換技術於結構振動訊號之解析,＂國立

Maria Gabriela Eberle and Maria Cristina Maciel (2003)

Chia-Ming Chang and Chin-Hsiung Loh.(2005) “Seismic Response

Anil K. Chopra(2001). “ Dynamics of Structures,＂ Prentice