岑威钧.亚塑性本构模型的隐式数值积分算法[J].水利学报,2007,38(3):319-324 |
亚塑性本构模型的隐式数值积分算法 |
Implicit numerical integration algorithm for hypoplastic constitutive model |
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DOI: |
中文关键词: 亚塑性 本构模型 率型 Gudehus_Bauer模型 隐式数值积分 算法 |
英文关键词: hypoplastic constitutive model rate type Gudehus Bauer model implicit numerical integration algorithm |
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中文摘要: |
针对亚塑性本构方程率型隐式的特点,推导了求解亚塑性本构方程的隐式数值积分算法,并对该算法做了进一步改进,引入自适应时间步长技术,在保证精度和收敛速度的前提下,通过合理选择时间步长,降低了计算时间,保证了该计算程序的可靠性。通过采用该算法所编制的Gudehus_Bauer亚塑性模型有限元程序,对已知算例进行验证计算结果表明,本文算法比较精确。最后对一堆石大堤进行了应力变形的亚塑性数值求解,所得结果合理,反映了该大堤堆石料的主要应力应变特性,表明本文算法求解实际工程问题时可行。 |
英文摘要: |
An implicit numerical integration algorithm is proposed for solving the implicit rate type hypoplastic constitutive equation. The computational program for FEM of the Gudehus_Bauer hypoplastic model is developed. For accelerating the calculation speed and ensuring the calculation accuracy the technique of self_adaptive time step is introduced. The validity of this method is verified by geotechnical shear test data given by other author. The method is applied to numerically calculate the hypoplastic deformation of a rockfill dam. The analysis result is reasonable. |
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