修正离散正则化算法的截割煤岩载荷谱的重构与推演

为探求镐型截齿载荷反演定量求解的方法,利用多截齿参数可调式旋转截割实验台,对不同楔入角镐型截齿的载荷进行关联分析。采用修正离散正则化方法,根据镐型截齿实验载荷谱及其结构和运动参数,重构其载荷谱,提取载荷谱特征参量,给出不同楔入角载荷谱的拓扑关系及推演算法。结果表明:楔入角在35°~50°以及楔入角和齿尖半锥角之和小于90°时,给出了实验截割载荷随楔入角的增大呈现出极值性的变化规律。重构40°和45°楔入角截齿载荷谱的特征值易辨识和提取,其截割能量主要处在1~4 Hz,二者均值关系为F40°≈1.2F45°,幅值之间具有正相关性,其相关系数r=0.976 7。其推演和重构载荷的特征值与实验最大值误差分别为1.5%,9.8%,均值误差分别为5.5%,1.6%,二者具有较高的吻合度。

Reconstruction and deduction of cutting coal and rock load spectrum on modified discrete regularization algorithm

Aimed at providing the quantitative inversion solution of conical pick load，using the test rig of multi-adjustable parameters rotary cutter to analysis the correlation of different wedge angle picks load.Based on modified discrete regularization method，according to the conical pick experiment load spectrum and its structure and motion parameters，reconstructing the load spectrum，extracting the characteristic parameters of the load spectrum，offering topological relations and deduction algorithm of parameters from the different wedge angles.The results show that the wedge angle in the 35°-50° range，the wedge angle and tip half cone angle of less than 90° experimental conditions，the axial load changed extremum with wedge angle increasing，the features of the pick load spectrum of the reconstruction 40° and 45° wedge angle，which are easy to recognize and extract，cutting energy is mainly concentrated in 1-4 Hz，mean relationship F40°≈1.2F45°，a positive correlation between the amplitude，the correlation coefficient r=0.976 7，the maximum error of the characteristic vale of the deduction load and reconstruct load compared with experiment load，which is about 1.5% and 9.8%，the mean error is about 5.5% and 1.6%，both of them have the alignment.