| 粗粒料动三轴试验颗粒流模拟对称性研究 |
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| 引用本文： | 杨贵,刘汉龙,任青文.粗粒料动三轴试验颗粒流模拟对称性研究[J].世界地震工程,2010(Z1). |
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| 作者姓名： | 杨贵 刘汉龙 任青文 |
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| 作者单位： | 河海大学岩土力学与堤坝工程教育部重点实验室;河海大学工程力学系;河海大学安全与防灾工程研究所; |
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| 基金项目： | 国家杰出青年科学基金项目(50825901); 水利部公益性行业专项经费项目(200801014); 国家博士后基金项目(20090461063) |
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| 摘 要： | 以粗粒料动三轴数值模拟为例,分析了不同对称模型(1/2,1/4,1/8,1/12)条件下,粗粒料动剪切模量和阻尼比的变化规律。计算结果表明,不同对称模型的计算结果存在一定的差异,但其变化规律基本一致,随着模型对称比例的增大动剪切模量逐渐增大,阻尼比逐渐减小,计算时间成倍减少。分析了颗粒生成过程中不均匀性对试验结果的影响。计算结果表明:1/8模型动剪切模量和阻尼比影响较小;1/12模型动剪切模量影响较大,阻尼比影响较小。建议在动力分析过程中采用1/8模型即可。
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| 关 键 词： | 动三轴试验 对称性 颗粒流模拟 动剪切模量 阻尼比 |
Study on the symmetry of dynamic triaxial test of coarse aggregates by PFC |
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| YANG Gui,LIU Hanlong,REN Qingwen.Study on the symmetry of dynamic triaxial test of coarse aggregates by PFC[J].World Information On Earthquake Engineering,2010(Z1). |
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| Authors: | YANG Gui LIU Hanlong REN Qingwen |
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| Institution: | YANG Gui1,2,3,LIU Hanlong1,REN Qingwen2(1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China,2.Department of Engineering Mechanics,3.Engineering Safety and Disaster Prevention Institute,China) |
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| Abstract: | Taking dynamic triaxial simulation of coare aggreqates for example,the dynamic shear modulus and damping ratio are studied by different symmetric models(1/2,1/4,1/8,1/12).The results show that there are differences in simulating results of dynamic shear modulus and damping ratio in different symmetric models but the change laws remain the same.With the increase of symmetric ratio,dynamic shear modulus increases and damping ratio decreases,and the calculation time reduces greatly.The initial particle random ... |
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| Keywords: | dynamic triaxial test symmetry PFC simulation dynamic shear modulus damping ratio |
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