基于MATLAB和ABAQUS的土体等效线性化方法二次开发
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摘要
本文基于ABAQUS的UMAT子程序,利用MATLAB编写主程序,自动修改INP文件,生成并修改UMAT子程序所需的非线性状态变量文件,自动调用ABAQUS进行迭代计算,并判断迭代收敛,实现了土的等效线性模型的动力分析。通过与SHAKE91和费康等编写的子程序计算结果的对比,验证了程序的正确可靠性,改变了等效线性化方法在ABAQUS上运行时需每轮人工输入的弊端,减少了人工处理数据的出错概率,提高了研究分析工作的效率,并且为ABAQUS二次开发提供了新的思路。
Based on the UMAT subroutine of ABAQUS code,a calculation program is developed by use of MATLAB. It can carry out the dynamic analysis of equivalent linear model of soil,through modifying the INP file,generating and modifying the nolinear state variables files that UMAT subroutine required,and calling ABAQUS for iteration calculation and judging iterative convergence automatically. Compared with the results of SHAKE91 code and Fei Kang's subroutine,the reliability and correctness of the programs is verified. It overcomes the disadvantages of manual input in each round when running equivalent linear method on ABAQUS code,reduces the error probability of artificial data processing,improves the efficiency of research and analysis works,and offers a new way for the secondary development of ABAQUS.
引文
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