气动弹性
振动
结构工程
时域
系统标识
鉴定(生物学)
控制理论(社会学)
频域
计算机科学
工程类
控制工程
物理
航空航天工程
声学
空气动力学
数据库
生物
植物
计算机视觉
人工智能
控制(管理)
度量(数据仓库)
作者
Heather Sauder,Partha Pratim Sarkar
出处
期刊:Wind and Structures
[Techno-Press]
日期:2017-05-25
卷期号:24 (5): 481-500
被引量:3
标识
DOI:10.12989/was.2017.24.5.481
摘要
A novel three-degree-of-freedom (DOF) forced vibration system has been developed for identification of aeroelastic (self-excited) load parameters used in time-domain response analysis of wind-excited flexible structures. This system is capable of forcing sinusoidal motions on a section model of a structure that is used in wind tunnel aeroelastic studies along all three degrees of freedom - along-wind, cross-wind, and torsional - simultaneously or in any combination thereof. It utilizes three linear actuators to force vibrations at a consistent frequency but varying amplitudes between the three. This system was designed to identify all the parameters, namely, aeroelastic- damping and stiffness that appear in self-excited (motion-dependent) load formulation either in time-domain (rational functions) or frequency-domain (flutter derivatives). Relatively large displacements (at low frequencies) can be generated by the system, if required. Results from three experiments, airfoil, streamlined bridge deck and a bluff-shaped bridge deck, are presented to demonstrate the functionality and robustness of the system and its applicability to multiple cross-section types. The system will allow routine identification of aeroelastic parameters through wind tunnel tests that can be used to predict response of flexible structures in extreme and transient wind conditions.
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