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Geomagic design X境界拟合曲面的3D逆向建模及误差分析 被引量:2
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作者 李润 邓龙 《凿岩机械气动工具》 2019年第1期36-40,共5页
介绍了一种逆向工程方法,即利用光栅式三维扫描仪获取曲面点云数据,运用Geomagic design X逆向建模软件对点云数据进行拼接和预处理,3D曲线网格构建优化,精确曲面造型等处理,实现对面片的境界拟合NURBS曲面重建,并利用Geomagicdesign X... 介绍了一种逆向工程方法,即利用光栅式三维扫描仪获取曲面点云数据,运用Geomagic design X逆向建模软件对点云数据进行拼接和预处理,3D曲线网格构建优化,精确曲面造型等处理,实现对面片的境界拟合NURBS曲面重建,并利用Geomagicdesign X软件得到逆向建模的NURBS曲面与原始点云数据比较的偏差色谱图,实现对逆向建模形成的NURBS曲面的误差分析,完成逆向工程在曲面设计中的应用初步研究。 展开更多
关键词 逆向建模 境界拟合 GEOMAGIC DESIGN X 误差分析
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Deformation prediction and analysis of underground mining during stacking of dry gangue in open-pit based on response surface methodology 被引量:6
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作者 QIU Xian-yang CHEN Jia-yao +3 位作者 SHI Xiu-zhi ZHANG Shu ZHOU Jian CHEN Xin 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第2期406-417,共12页
Deformation prediction and the analysis of underground goaf are important to the safe and efficient recovery of residual ore when shifting from open-pit mining to underground mining.To address the comprehensive proble... Deformation prediction and the analysis of underground goaf are important to the safe and efficient recovery of residual ore when shifting from open-pit mining to underground mining.To address the comprehensive problem of stability in the double mined-out area of the Tong-Lv-Shan(TLS)mine,which employed the dry stacked gangue technology,this paper applies the function fitting theory and a regression analysis method to screen the sensitive interval of four influencing factors based on single-factor experiments and the numerical simulation software FLAC3D.The influencing factors of the TLS mine consist of the column thickness(d),gob area span(D),boundary pillar thickness(h)and height of tailing gangue(H).The fitting degree between the four factors and the displacement of the gob roof(W)is reasonable because the correlation coefficient(R2)is greater than0.9701.After establishing29groups that satisfy the principles of Box-Behnken design(BBD),the dry gangue tailings process was re-simulated for the selected sensitive interval.Using a combination of an analysis of variance(ANOVA),regression equations and a significance analysis,the prediction results of the response surface methodology(RSM)show that the significant degree for the stability of the mined-out area for the factors satisfies the relationship of h>D>d>H.The importance of the four factors cannot be disregarded in a comparison of the prediction results of the engineering test stope in the TLS mine.By comparing the data of monitoring points and function prediction,the proposed method has shown promising results,and the prediction accuracy of RSM model is acceptable.The relative errors of the two test stopes are1.67%and3.85%,respectively,which yield satisfactory reliability and reference values for the mines. 展开更多
关键词 response surface methodology (RSM) Box-Behnken design (BBD) numerical simulation boundary pillar deformation prediction
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