Development of in-plane and out-of-plane deformations simultaneous measurement method for the analysis of buckling
Development of in-plane and out-of-plane deformations simultaneous measurement method for the analysis of buckling
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DOI：
10.1117/1.oe.54.2.024102
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发表时间：
2015-02-01
影响因子：
1.3
通讯作者：
Arai, Yasuhiko
中科院分区：
文献类型：
--
作者：
Arai, Yasuhiko
在屈曲变形测量中，传统上采用光学测量方法进行非接触测量。此外，由于在屈曲现象中同时发生面内变形和面外变形，因此必须通过分析一些动力事件的测量结果来精确区分这些面内和面外变形。在传统的方法中，多个双光束干涉仪组合在一起，以三维变形的形式测量面内和面外的变形。普通的双光束干涉仪被定义为由两个独立的干涉仪组合而成的光学系统。在这个定义下，利用只使用两个散斑图案的散斑干涉仪的思想，构造了一种由两个相机和一个激光器组成的新的干涉仪。在此基础上，提出了一种分离面内和面外变形的分析方法。实验结果表明，该方法具有较高的测量精度。从而证实了该方法中面内测量和离面测量的独立性。并将该方法应用于屈曲现象的分析。结果表明，梁的屈曲分析结果与欧拉屈曲理论吻合较好。(C)2015年光学仪器工程师学会(SPIE)
In the measurement of deformation of buckling phenomenon, the optical measurement methods have been traditionally employed for performing noncontact measurement. Furthermore, because the in-plane and out-of-plane deformations simultaneously happen in the buckling phenomena, these in-plane and out-of-plane deformations must be separated precisely by analyzing some measured results of dynamic events. In traditional methods, some two-beam interferometers have been combined to measure in-plane and out-of-plane deformations as three-dimensional deformations. An ordinary two-beam interferometer is defined as the optical system that is combined by two independent interferometers. Under this definition, a new interferometer that is set up by two cameras and one laser is constructed by using the idea of a speckle interferometer that uses only two speckle patterns. Then, an analysis method for separation of in-plane and out-of-plane deformations is also proposed. In the experimental results, the high measuring accuracy of the proposed methods is confirmed. Consequently, the independency between in-plane and out-of-plane measurements in this method is confirmed. Furthermore, the new method is applied to the analysis of the buckling phenomenon. As the results, it can be confirmed that the results of the beam of buckling analysis agree very well with the theory of Euler's buckling. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)