An investigation of the temperature influence on a shift of natural frequencies using digital image correlation

被引：2

作者：

Hagara, Martin ^{[1
]}

Schrötter, Martin ^{[1
]}

Lengvarský, Pavol ^{[1
]}

机构：

[1] Technical University of Košice, Department of Applied Mechanics and Mechatronics, 042 00 Košice

来源：

Applied Mechanics and Materials | 2014年 / 611卷

关键词：

Digital image correlation; Modal analysis; Modan; 3D; Temperature influence;

D O I：

10.4028/www.scientific.net/AMM.611.506

中图分类号：

学科分类号：

摘要：

The contribution describes an original optical measuring technique serving for the investigation of temperature influence on the shift of investigated objects natural frequencies. The mentioned method uses a modified high-speed digital image correlation system with original program Modan 3D created in Matlab, by which it is possible to non-contactly determine the natural frequencies using complex mode indicator function (CMIF) or normal mode indicator function (NMIF), the mode shapes as well as the damping ratio. Influence of the temperature on the shift of natural frequencies was analyzed at the planar steel specimen of circular shape with three holes. To the excitation a modal hammer was used. The specimen heating was realized by a hot-air gun, whereby the influence of the elevated temperature on the shift of natural frequencies was investigated by three temperatures distinguishing the room temperature 50° C, 75° C and 100° C. © (2014) Trans Tech Publications, Switzerland.

引用

页码：506 / 510

页数：4

共 6 条

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