三种岩石高温后纵波波速特性的试验研究

对经受不同高温后熔结凝灰岩、花岗岩及流纹状凝灰角砾岩的波动特性进行了研究,分析比较了三种岩石纵波波速、密度、弹性模量及峰值应力随经历温度的变化规律,并研究了纵波波速与密度,纵波波速与弹性模量,纵波波速与峰值应力的关系。结果表明,经历高温后三种岩石的纵波波速、密度、弹性模量及峰值应力均有不同程度的降低,且随着经历温度的升高,降低的幅度增大。此外,纵波波速降低的幅度均大于密度降低的幅度;而纵波波速与弹性模量、峰值应力的关系则依赖于不同的岩石而表现出不同的规律。

Experimental study on longitudinal wave characteristics of tuff, granite and breccia after high temperature

Experimental study was performed on the longitudinal wave characteristics of tuff,granite and breccia under different high temperatures.The longitudinal wave velocity,density,Young’s modulus and peak stress of rocks were analyzed.Furthermore,relationship between longitudinal wave velocity and density,Young’s modulus and peak stress were studied.It was shown that the velocity of longitudinal wave,density,Yong’s modulus and peak stress decreases with temperature.The longitudinal wave velocity decreased more than density.However,the relationship among longitudinal wave velocity,Young’s modulus and peak stress presented different variation according to the type of rock.