混合料配合比矿料组成理论级配设计的迭代法

为解决正规方程法进行混合料配合比矿料组成设计时出现负数解及混合料级配超出玛论界限范围的问题，采用迭代算法，先按正规方程法计算矿料组成比例系数，将得到的混合料级配作为目标级配初始值，对超出理论级配上限或下限的目标级配值强制调整为相应的界限值，当组成比例系数为负数时则取消对应的矿料，根据修正后的目标级配再利用正规方程法计算新的矿料组成比例系数，并得到新的混合料级配及新的目标级配。经过迭代计算得到完全满足理论设计级配范围要求的解。迭代法原理简单明了、结果收敛稳定、应用方便，具有良好的工程实用性。

Iterative Method for Aggregate Theory Gradation Design in Ratio of Mixture

While calculating the aggregate proportion in the ratio of mixture design by normal equation method,the value of solution may be negative,or the result gradation of the compound may go beyond the standard range.By iterative algorithm,the gradation data calculated by normal equation method was used as initial target value,setting the gradation to the boundary value if the sieving data goes beyond limits,and canceling the relevant aggregate if the result of proportion was negative.According to the adjusted object value,using the normal equation method again,the new aggregate proportion and the new gradation of the compound will come into being as well as the next target value.Finally,the accurate result which was up to the mustard can be found by iterative calculation.Although the principle of the iterative method was simple,it had excellent characteristic, such as good astringency,stability,convenience,and applicability in the engineering.