| 考虑材料应变软化的非线性有限元的改进变Kp法 |
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| 引用本文： | 冯兆祥,吉林,卓家寿. 考虑材料应变软化的非线性有限元的改进变Kp法[J]. 解放军理工大学学报(自然科学版), 2005, 6(4): 382-385 |
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| 作者姓名： | 冯兆祥 吉林 卓家寿 |
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| 作者单位： | [1]江苏省长江公路大桥建设指挥部,江苏镇江212002 [2]河海大学土木工程学院,江苏南京210007 |
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| 摘 要： | 针对变Kp法进行非线性有限元求解时，存在求解精度低和应变软化难以模拟的缺点，分析了变Kp法与增量法内在联系与区别，将初应力迭代法的基本思想引进到变Kp法，提出了改进变Kp法。不仅保持了原方法求解效率高的优点，而且可改善原方法求解精度，使该方法适用于材料应变软化的数值模拟。
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| 关 键 词： | 非线性有限元 变Kp法 增量法 应变软化 |
| 文章编号： | 1009-3443(2005)04-0382-04 |
| 收稿时间： | 2004-09-20 |
| 修稿时间： | 2004-09-20 |
Improved variational Kp method of nonlinear FE consideringstrain -softening of material |
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| FENG Zhao-xiang,JI Lin and ZHUO Jia-shou. Improved variational Kp method of nonlinear FE consideringstrain -softening of material[J]. Journal of PLA University of Science and Technology(Natural Science Edition), 2005, 6(4): 382-385 |
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| Authors: | FENG Zhao-xiang JI Lin ZHUO Jia-shou |
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| Affiliation: | Jiangsu Province Yangtze River Highway Bridge Construction Commanding Department, Zhenjiang 212002, China;Jiangsu Province Yangtze River Highway Bridge Construction Commanding Department, Zhenjiang 212002, China;Civil Engineering Institute, Hehai University, Nanjing 210098, China |
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| Abstract: | To overcome the shortcomings of the low precision and the difficulty to simulate strain-softening in variational K_p method to be used to solve the non-linear FEM, an improved method in which the ideas of initial stiffness iteration method was introduced into variational K_p method was put forward based on the analysis of relation between the variational K_p method and increment method. The improved method not only keep the merits of high efficiency, but also improve the precision of solution, and may be used to simulate the material's strain-softening. |
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| Keywords: | nonlinear finite element variational Kp method increment method strain-softening |
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