流体机械

2018, v.46;No.558(12) 6-12

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水力参数对铝合金孔缘形貌多维影响特征
Multi-dimensional Influences of Hydraulic Parameters on Aluminum Alloy Hole-edge Morphology

刘佳亮;张娣;王梦瑾;
LIU Jia-liang;ZHANG Di;WANG Meng-jin;Chongqing Jiaotong University;National and local joint engineering laboratory of traffic civil engineering materials,Chongqing Jiaotong University;

摘要(Abstract):

利用从明暗恢复形状(Shape From Shading,SFS)方法对磨料水射流侵彻铝合金孔缘形貌进行三维重构,并通过构建综合反映孔缘粗糙度分布整体性、离散性、对称性及集中性的系统评价指标,探讨了磨料水射流主要水力参数对铝合金孔缘形貌的多维影响特征。在试验所限定的参数范围内,揭示了孔缘粗糙度算术平均偏差Ra、轮廓均方根偏差Rq、偏度系数Rs及峰度系数Rt随水力参数的变化规律;得到了水力参数对孔缘形貌特征的综合影响性排序:靶距h>射流直径d>泵压p>磨料质量流量l;建立了孔缘形貌特征评价指标与水力参数的函数关系以及孔缘形貌特征评价指标的综合模型。
The morphology of the edge of aluminum alloy hole through which the abrasive waterjet penetrates was reconstructed by the shape from shading(SFS) method,and the multi-dimensional influences of main hydraulic parameters of abrasive waterjet on aluminum alloy hole-edge morphology were investigated by building systematic evaluation indexes that comprehensively reflect the integrality,dispersion,symmetry and the centralization of the surface roughness distribution. In the range of the parameters of the experiments,the variation rules of the arithmetic mean deviation Ra,the root mean square deviation Rq,the skewness coefficient Rs and the kurtosis coefficient Rt of the hole-edge surface roughness with hydraulic parameters were revealed. The comprehensive influences of hydraulic parameters on the hole-edge morphology were ranked in the order of target distance h>sand pipe diameter d>pump pressure p>abrasive mass flow l. Finally,the functional relations between evaluation indexes of the hole-edge morphology characteristics and hydraulic parameters,and the comprehensive model of evaluation indexes were obtained.

关键词(KeyWords): 从明暗恢复形状;磨料水射流;形貌;粗糙度
shape from shading;abrasive water jet;morphology;roughness

Abstract:

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基金项目(Foundation): 国家自然科学基金资助项目(51608082);; 重庆市科委基础与前言研究项目(cstc2016jcyjA0374);; 重庆市教委科学技术研究项目(KJ1500509)

作者(Author): 刘佳亮;张娣;王梦瑾;
LIU Jia-liang;ZHANG Di;WANG Meng-jin;Chongqing Jiaotong University;National and local joint engineering laboratory of traffic civil engineering materials,Chongqing Jiaotong University;

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