磨料水射流切割影响因素及切割深度预测模型  

Influencing factors and depth prediction model of pre-mixed abrasive water jet cutting

作　　者：郭嘉赫 戚绪尧[1] 王栋 朱国庆[1] 陈良舟 GUO Jiahe;QI Xuyao;WANG Dong;ZHU Guoqing;CHEN Liangzhou(School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《中国安全科学学报》2020年第1期101-106,共6页China Safety Science Journal

基　　金：国家重点研发计划(2016YFC0802907)。

摘　　要：切割破拆是实现高效应急救援的方式之一,针对现有破拆工具切割性能与适用性方面的不足,研究前混合磨料水射流(AWJ)用于破拆切割混凝土过程的影响程度,并提出优化方法;主要采用单因素试验法和正交试验法研究射流压力、横移速度、冲击角度、靶距等工艺参数对切割性能的影响程度,并通过多元线性回归分析得到切割深度的预测模型。结果表明:切割深度受不同参数的影响存在明显差异,随射流压力增大而增大,随横移速度增大而减小,随靶距增大而先增大后减小,且存在最佳靶距为4 mm,随冲击角度呈现波动式变化,存在最佳冲击角度为80°;各工艺参数对切割深度的影响程度存在差异,从大到小依次为:射流压力、横移速度、靶距。In order to address deficiencies of existing forcible entry tools in cutting performance and applicability as cutting is one of the effective ways for emergency rescue,study was conducted on influence degree of pre-mixed AWJ on demolition and cutting of concrete,and an optimized method was proposed.Then,effects of process parameters such as jet pressure,traverse speed,impact angle,and target distance on cutting performance were studied mainly by single-factor experiments and orthogonal experiments.Finally,a prediction model of cutting depth was obtained through multiple linear regression analysis. The results show that cutting depth varies significantly due to influence of different parameters. It increases along with the increase of jet pressure,decrease with that of traverse speed while increase and then decreases in that case of target distance with the optimal target distance at 4 mm. As impact angle fluctuates,the optimal impact angle is 80°. And these parameters rank as jet pressure,traverse speed,target distance according to their influence degree from big to small on cutting depth.

关 键 词：破拆装置 磨料水射流(AWJ) 切割深度 预测模型 多元线性回归分析 正交试验法 

分 类 号：X913.4[环境科学与工程—安全科学]