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利用非线性高能超声测试设备及超声波(纵波、横波)波速与物体力学参数的关系,对人造冰样进行了冰样力学参数(杨氏模量、泊松比、剪切模量、体积模量)随温度变化的研究。通过MATLAB进行所测数据曲线拟合,得到超声波波速在人造冰样中随温度的变化规律,进而由理论公式推导所测人造冰样力学参数随温度的变化规律。结果表明:冰样中超声波波速随温度降低而升高,冰样的杨氏模量、泊松比、剪切模量、体积模量也都随温度降低而升高。本研究有助于超声波检测法在冰样物理力学性质测量中的应用,为开展南极冰盖、海冰以及终年冻土等力学及流动特性研究提供理论模型和实验数据。
Based on the nonlinear high-energy ultrasonic testing equipment and the relationship between the ultrasonic wave (longitudinal wave and shear wave) wave velocity and the mechanical parameters of the object, the ice-like mechanical parameters (Young’s modulus, Poisson’s ratio, shear modulus, bulk modulus ) With the temperature changes in the study. The curve fitting of measured data was carried out by MATLAB to get the variation law of ultrasonic wave velocity with temperature in artificial ice sample, and then the change law of mechanical parameters of artificial ice sample was deduced with theoretical formula. The results show that the ultrasonic wave velocity in ice samples increases with the decrease of temperature, and the Young’s modulus, Poisson’s ratio, shear modulus and bulk modulus of ice samples also increase with the decrease of temperature. This study is helpful to the application of ultrasonic testing in the measurement of ice physical and mechanical properties, and provides theoretical models and experimental data for the study of mechanical and fluid properties such as Antarctic ice sheet, sea ice and permafrost.