| 刘夕才.岩土弹塑性有限元分析的隐式积分弹性刚度法[J].计算力学学报,1996,13(4): |
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| 岩土弹塑性有限元分析的隐式积分弹性刚度法 |
| Implicit integration elastic stiffness method for the finite element analysis of rock and soil elasto plastic model |
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| DOI：10.7511/jslx19964072 |
| 中文关键词: 岩土弹塑性 有限元 隐式积分法 弹性刚度法 |
| 英文关键词:rock and soil elasto plastic model,finite element,implicit integration algorithm,elastic stiffness method |
| 基金项目:国家自然科学基金,博士后基金,煤炭科学基金 |
| 刘夕才 |
| 中国矿业大学北京研究生部岩土工程研究所 |
| 摘要点击次数: 1385 |
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| 中文摘要: |
| 本文提出了用于岩土弹塑性有限元分析的隐式积分弹性刚度算法。该算法既具有隐式积分法精度好、效率高、无条件稳定等优点，也具有弹性刚度法中刚度矩阵正定、对称的特点，更重要的是它避免了传统切线刚度法在处理岩土非相关联塑性流动和屈服面“角点”所遇到的非对称性和奇异性计算问题。通过算例分析了该算法的精度、效率 |
| 英文摘要: |
| An implicit integration elastic stiffness method has been developed for the finite element analysis of rock and soil elasto plastic models.This method not only has the advantages of the good accuracy,high efficiency and unconditional stability,but also has the charateristics of the positive definite and symmetric stiffness matrices.Furthermore,it avoids nonsymmetric and sigular computational problems of conventional tangent stiffness methods for dealing with the nonassociated plastic flows and the sigular cornetr points of yield surfaces.Through the numerical experiment,the accuracy and efficiency of this method are examined in details. |
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