To address the mixing uniformity of multiple organic hydraulic (MOH) mixtures in a continuous mixer, three types of mixing parameters and their coupling effects were studied by the discrete element method (DEM) and response surface methodology. To achieve the research goal, only one parameter was selected for each type of parameter, and the corresponding model was established. Numerical simulations and optimization were implemented. A three-level, three-factor Box-Behnken Design method combined with response surface methodology was applied for the numerical design. The influence of the parameters on the mixing uniformity of the mixture was analyzed by analysis of variance (ANOVA). The ANOVA results show that the rotation speed, the installation angle, the filling ratio and the coupling between the rotation speed and the filling ratio have a significant effect on the mixing uniformity of the mixture, that the rotation speed and the filling ratio have the strongest effect on the response, and that of the fitting model of the mixing uniformity can fit the simulation data well. The coupling effect results show that the influence of coupling between the revolution and installation angle on the mixing uniformity is consistent with that between the filling ratio and installation angle and that the coupling effect between the rotation speed and the filling ratio is different. It is also found that the optimal parameter range under one factor is different from that under multivariable coupling. The optimization results show that when the discrete coefficient is the smallest, the optimal combination of the parameters is a revolution of 350 r/min, an installation angle of 25°, and a filling ratio of 70%. The experimental results are consistent with the optimization results, which indicate the correctness of the parameter optimization results.

为了解决连续混合器中多种有机水力（MOH）混合物的混合均匀性问题，通过离散元方法（DEM）和响应面方法研究了三种混合参数及其耦合效果。为了达到研究目的，每种类型的参数仅选择一个参数，并建立了相应的模型。进行了数值模拟和优化。数值设计采用了三级三因素Box-Behnken设计方法与响应面方法相结合。通过方差分析（ANOVA）分析了参数对混合物混合均匀性的影响。方差分析结果表明，转速，安装角度，填充率和转速与填充率之间的耦合对混合物的混合均匀性有显着影响，转速和填充率对响应的影响最强，并且对模型的拟合模型混合均匀性可以很好地拟合模拟数据。耦合效应结果表明，转速与安装角之间的耦合对混合均匀性的影响与填充比与安装角之间的影响一致，且转速与填充比之间的耦合作用不同。还发现一个因素下的最优参数范围与多变量耦合下的最优参数范围不同。优化结果表明，当离散系数最小时，参数的最佳组合是350 r / min的转数，25°的安装角度和70％的填充率。实验结果与优化结果吻合，表明参数优化结果的正确性。