摘要
考虑岩石细观组构的不同,建立了随机非均匀介质的固-热耦合数学模型,给出了一般意义下的有限元分析方法。进而考虑热膨胀系数和热传导系数为随机介质,在平面应变模型下,进行了岩石热破裂的数值试验,以花岗岩为样本,对均匀分布、正态分布、韦泊分布等 3 种随机分布下,热膨胀系数和热传导系数变化引起的岩石破裂门槛值的变化做了详细研究,结果表明,热膨胀系数和热传导系数的概率分布形式和分布参数及时间对花岗岩热破裂规律及门槛值温度的分布有重要影响。
In consideration of difference in micro-structure of rocks, the paper presents random non-homogeneous solid-head coupled model and FEM concerned, and then in consideration of the random non-homogernity of thermal dilation and conduction coefficients, plane stain model, For example of granite, assumed thermal dilatability and thermal conduction with uniform distributing, Gauss distributing, Weibull distributing, based on a lot of numerical experiments, study on the hot cracking threshold of rock, conclusions of random distributing function and parameter and time influence to thermal cracking law and temperature threshold is presented.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第1期135-139,共5页
Rock and Soil Mechanics
