岩石爆破损伤模型的比选与改进  

Comparison and improvement of blasting damage models for rock

作　　者：胡英国[1,2] 卢文波[1,2] 陈明[1,2] 严鹏[1,2] 周创兵[1,2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]武汉大学水工岩石力学教育部重点实验室,武汉430072

出　　处：《岩土力学》2012年第11期3278-3284,共7页Rock and Soil Mechanics

基　　金：国家杰出青年基金项目(No.51125037);国家重点基础发展规划计划(973)项目(No.2011CB013501);国家自然科学基金资助项目(No.51179138);中央高校基本科研业务费专项资金资助(No.2012206020205)

摘　　要：归纳了目前应用较为广泛的爆破损伤模型关于损伤变量的定义方法,基于FORTRAN与LS-DYNA自定义接口,将5种典型的爆破损伤模型成功导入LS-DYNA。根据具体的工程实例,对5种爆破损伤模型计算的精确性进行了对比计算和验证。结果表明,KUS模型与RFPA模型对应的结果与实测值更接近。选取计算结果较为准确的KUS模型进行改进,考虑压缩损伤,并修正了宏观弹性常数的确定方法,建立了拉压损伤模型,并对该模型的计算精确性进行验证,结果表明,该拉压损伤模型可以更好地定量描述岩体爆破损伤范围。Several variables of different damage models are listed and compared.Based on a specific project,the accuracy of five blasting damage models which are widely used are tested and compared through the user subroutine interface of LS-DYNA.The results show that the calculated values of KUS and RFPA models are more close to the measured values than other blasting models.Based on the KUS model,considering the compression damage,a modified method to determine the macroscopic elastic parameters is put forward;and then a new tension-compression damage model is established.The accuracy of the new tension-compression damage model is verified.The results show that the new tension-compression damage model can describe the damage effect better.

关 键 词：损伤区 爆破损伤模型 对比 拉压损伤模型 

分 类 号：O383.1[理学—流体力学] TV554[理学—力学]