水闸改进阻力系数法与有限元计算的对比分析

Comparison and Analysis of Improved Resistance Coefficient Method and Finite Element Method for Sluice

在水闸设计中,渗流计算是关键。目前规范中常用改进阻力系数法计算闸基渗流,在实际操作中该方法计算过程复杂,需经过多次修正才能得到最终结果。为简化计算,引入有限元分析的方法计算闸基渗流,通过对同一水闸分别采用2种不同的方法进行计算,结果表明两者计算结果相差不大,有限元方法相比改进阻力系数法计算值偏高,在工程上偏安全,因此有限元方法可用于闸基渗流计算,且计算过程更加简捷。但在水头分析中,有限元分析法仅能导出水头总体分布情况,结论相对粗糙,因此在实践中更加推荐采用改进阻力系数法,同时建议利用有限元分析法进行校核计算。

The seepage calculation is a key step in sluice design.At present,the improved resistance coefficient method is commonly used in the code to calculate the gate foundation seepage.In practical operation,the calculation process of this method is complex,and the final result can be obtained only after multiple modifications.In order to simplify the calculation,this paper introduces the finite element analysis method to calculate the gate foundation seepage.By using two different methods to calculate the same sluice,the results show that there is little difference between the two calculation results.Compared with the improved resistance coefficient method,the finite element method has a higher calculation value,which is safer in engineering.Therefore,the finite element method can be used for the gate foundation seepage calculation,and the calculation process is simpler.However,in the water head analysis,the finite element analysis method can only derive the overall distribution of water head,and the conclusion is relatively rough.Therefore,in practice,the author recommends the improved resistance coefficient method and the finite element analysis method for check calculation.