刀齿切削破岩实验及分形研究  

Experimental and fractal studies on rock cutting with pick

作　　者：欧阳义平[1] 杨启[1,2] 金晔 

机构地区：[1]上海交通大学海洋工程国家重点实验室,高新船舶与深海开发装备协同创新中心,上海200240 [2]上海交大海洋水下工程科学研究院有限公司,上海200231 [3]中国铁建港航局集团有限公司,广东珠海519070

出　　处：《中国港湾建设》2017年第11期76-81,共6页China Harbour Engineering

基　　金：国家自然科学基金项目(51179104)

摘　　要：为研究刀齿切削破岩切削载荷与其影响因素之间的关系,进行了刀齿切削破岩实验,分析了切削厚度与切削宽度对切削载荷的影响。然后利用分形理论,得到了切削载荷分形维数和碎块分形维数的计算方法,并计算了各种切削工况下的载荷分形维数和碎块分形维数。研究结果显示:1)切削载荷基本随着切削宽度和切削厚度的增加而增大;2)碎块分形维数会随着切削宽度和切削厚度的增加而增大;3)载荷分形维数随着切削宽度的增加会减小,但与切削厚度关系不大;4)切向力与碎块分形维数之间有很强的线性相关性,对于所进行的实验,切向力可利用回归公式由碎块分形维数唯一确定,这为切向力的估算提供了一种全新思路。In order to reveal the relationships between cutting loads and its affecting factors, we carried out rock cutting experiment, and analyzed the influence of cutting thickness and cutting width on cutting load. By using the fractal theory, we obtained the methods for calculating the fractal dimension of cutting loads and the fractal dimension of debris, and calculated the fractal dimensions of cutting loads and the fractal dimension of debris under various cutting conditions. The research results shows： larger cutting depth and cutting width leads to larger cutting loads; the fractal dimension of debris will increase as the cutting depth and cutting width increase; the fractal dimension of the cutting loads will decrease with the increasing of the cutting width, but it is basically not affected by the cutting depth; the cutting force is strongly affected by the fractal dimension of the debris and can be estimated by a linear regression formula, which provides a new method to estimate cutting force in rock cutting.

关 键 词：岩石切削 切削载荷 分形理论 切削实验 分形维数 

分 类 号：TU45[建筑科学—岩土工程]