盾构螺旋输送机适应性设计智能决策

螺旋输送机作为土压平衡式盾构的重要功能部件之一,常常需要进行设计调整以满足新的工程需求.但是,设计调整容易导致产品指标发生过量变动,进而对产品的可靠性、安全性和可维护性等产生负面影响.为最大化重用已有的、经过工程验证的设计方案,降低设计调整的负面影响,提出了一种盾构螺旋输送机适应性设计智能决策方法.首先,收集盾构螺旋输...

Intelligent decision for adaptive design of shield screw conveyor

As one of the important functional components of earth-pressure balance shield,the screw conveyor often needs to be adjusted in design to meet new engineering requirements.However,the design adjustment is easy to lead to excessive changes in product indicators,which will have a negative impact on the reliability,safety and maintainability of products.In order to maximize the reuse of the existing design scheme verified by engineering and reduce the negative impact of design adjustments,an intelligent decision method for the adaptive design of shield screw conveyor was proposed.Firstly,the product indicators and design parameters of the shield screw conveyor were collected to construct the product data set,and the dependency matrix and the correlation matrix between product indicators and design parameters were established through the dependency analysis and correlation analysis,respectively;then,based on the correlation between product indicators and design parameters,the hierarchical clustering was carried out to obtain different product element clusters,and the influence scope of product indicator changes in the process of design adjustment was calibrated;and then,the key design parameters corresponding to each product indicator in the different clusters were identified by combining the dependency matrix and hierarchical clustering results;finally,the neural network was used to construct the regression prediction model of product indicator-design parameter,and the design parameter adjustment schemes with relatively good adaptability to new product indicator requirements were obtained through search.Through the comparative analysis of the demand value and predicted value of the product indicator of shield screw conveyor,it was found that its mean absolute percentage error(MAPE)was 3.9647%,and the achievement degree was 96.04%,which basically met design requirements.The results show that the proposed method can accurately calibrate the potential influence range of the product indicator change of shield screw conveyor,effectively identify the key design parameters on which the product indicator depends,and realize the intelligent solution of key design parameters.It can not only provide decision support for the adaptive design of shield screw conveyors,but also provide technical reference for the product adaptive design to meet personalized and differentiated requirements.