期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 48, 期 1-2, 页码 34-48出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2013.07.017
关键词
Ambient vibration; Operational modal analysis; Spectral analysis; Uncertainty law
资金
- Research Grants Council of the Hong Kong Special Administrative Region, China [9041758 (CityU 110012)]
- University of Liverpool, UK [EGG10034]
- Ove Arup and Partners Hong Kong Ltd. (OAP) [URN 05/81d]
This paper presents a qualitative analysis of the uncertainty laws for the modal parameters identified in a Bayesian approach using ambient vibration data, based on the theory developed in the companion paper. The uncertainty laws are also appraised using field test data. The paper intends to provide insights for planning ambient vibration tests and managing the uncertainties of the identified modal parameters. Some typical questions that shall be addressed are: to estimate the damping ratio to within 30% of posterior coefficient of variation (c.o.v), what is the minimum data duration? Will deploying an additional accelerometer significantly improve the accuracy in damping (or frequency)? Answers to these questions based on this work can be found in the Conclusions. As the Bayesian approach allows full use of information in the data for given modeling assumptions, the uncertainty laws obtained in this work represent the lower limit of uncertainty (estimation error) that can be achieved by any method (Bayesian or non-Bayesian). (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据