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NHẬN DẠNG CÁC THAM SỐ ĐỘNG HỌC CỦA TÒA NHÀ BẰNG PHƯƠNG PHÁP FDD

In the recent years, Operational Modal Analysis, also known as Output-Only Analysis, has been used for estimation of modal parameters of the structures such as the buildings, bridges, towers, mechanical structures. The advantage of this method is expensive excitation equipment can then bereplaced by ambient vibration sources, such as wind, wave, and traffic are used as input of unknown magnitude, and are then modeled as white noise in the modal identification algorithms. In this paper presents an overview of the non-parameter technique based Frequency Domain
Decomposition (FDD), dynamic model of n-story building and method of modal parameters identification using FDD. This method is illustrated by measurements on a model of 2-story building excited by a hard rubber mallet and vibration motor.

Từ khóa: Tham số động học, Phương pháp phân tích modal, OMA, EMA

9 p ovanketv4 15/11/2016 498 1

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