中国激光, 2002, 29 (4): 376, 网络出版: 2006-08-08
一种新型的实验地震学光学模拟系统
A Novel Optical System Created for Experimental Earthquake Simulation Research
实时全息术 微破裂 瞬态波形自动记录仪 应力(应变)场 核 破裂 real-time holography micro-crack transient automatic wave-form recorder stress (strain) field nucleation fracture
摘要
介绍了一种新型的实验地震学光学模拟系统.它将实时全息技术与声发射源测定技术相结合应用于实验地震学研究,前者检测和记录试件内应力场及其变化,后者检测和记录微破裂所激发的超声波,借以确定试件内微破裂发生的时间、位置和强度.综合两种方法所获数据,从微破裂丛集成核过程与应力场之间的关系来寻求破裂形成、扩展的某些规律性.试验观察到一些极有研究价值的现象,特别是系统能将破裂的形成和扩展,从微破裂丛集成核直至整个试件碎裂的过程,以较高的分辨率记录下来,初步获得微破裂成核过程与应力场关系的某些规律性.
Abstract
By means of combining the real-time holographic device and the acoustic source testing device, a new tool for experimental earthquake simulation research is developed. The stress fields and its variations in the specimen are recorded by real-time holographic interferometry while the wave-forms of ultra-sonic waves stimulated by the micro-cracks are recorded by a transient automatic wave-form recorder to determine the time, location and intensity of the micro-cracks. Some noticeable phenomena have been observed in the experiment, the elastic strain and plastic strain can be visualized clearly and can be recorded in high resolution by this method as well as the generation and extending of cracks.
熊秉衡, 王正荣, 吕小旭, 钟丽云, 张永安, 佘灿麟, 许昭永, 杨润海, 赵晋明, 王赟赟, 李佩林, 华培忠. 一种新型的实验地震学光学模拟系统[J]. 中国激光, 2002, 29(4): 376. 熊秉衡, 王正荣, 吕小旭, 钟丽云, 张永安, 佘灿麟, 许昭永, 杨润海, 赵晋明, 王赟赟, 李佩林, 华培忠. A Novel Optical System Created for Experimental Earthquake Simulation Research[J]. Chinese Journal of Lasers, 2002, 29(4): 376.
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