大理岩RHT模型参数确定研究

发布时间：2018-02-20 15:44

  本文关键词： RHT模型 SHPB 正交试验 参数优化　出处：《北京理工大学学报》2017年08期 　论文类型：期刊论文

【摘要】：RHT模型共计包含34个参数,其中A,n,f_s*,f_t*,Q0,g_c*,ξ,D_1,ε_p~m,A_f,n_f,p_(comp)和N因试验获取途径复杂较难确定,多数学者在利用RHT模型模拟岩石爆破破碎时,不管岩石种类如何变化都只是简单引用混凝土的相关参数,为了较为准确地获得大理岩的相关参数取值,以静力学试验、声波测试试验和SHPB冲击试验为基础,LSDyna数值模拟为手段,通过正交试验的方法对以上参数进行优化确定,并将参数优化前、后的模拟曲线分别与SHPB冲击大理岩的试验曲线进行对比.结果表明:以上参数经过正交模拟试验优化确定后,缩小了模拟曲线与SHPB冲击试验曲线的对比误差,得到了适用于大理岩的RHT模型参数.
[Abstract]:The RHT model contains a total of 34 parameters, of which it is difficult to determine how the RHT model is used to simulate rock blasting, no matter how the type of rock changes, and how the rock type changes are only simple references to the relevant parameters of concrete, no matter how the type of rock changes, it is difficult to determine whether the way of obtaining the data from the RHT model is very complicated, no matter how the type of rock changes, no matter how the type of rock changes, it is only a simple reference to the relevant parameters of concrete. In order to obtain the relative parameters of marble more accurately, based on static test, acoustic wave test and SHPB impact test, LSDyna numerical simulation was used to optimize and determine the above parameters by orthogonal test. The simulation curves before and after parameter optimization are compared with the experimental curves of SHPB impact marble. The results show that the error between the simulation curve and the SHPB impact test curve is reduced after the above parameters are optimized by orthogonal simulation test. The parameters of RHT model suitable for marble are obtained.
【作者单位】： 中国矿业大学(北京)力学与建筑工程学院;昆明理工大学城市学院;Faculty
【基金】：昆明理工大学引进人才科研启动基金项目(KKSY201756009)
【分类号】：TU45
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本文编号：1519341