Left-lateral shear deformation found in southern part of the Gaoligong range in west Yunnan and its tectonic implications

It is generally understood that the Tertiary structural deformation in the Gaoligong range in west Yunnan was under the control of right-lateral shear, resulting from the northward movement of Indian relative to Eurasian. In the southern part of Gaoligong range, however, we have recently found many pieces of evidence of left-lateral shear deformation, featuring a 10 km wide shear zone cutting through all tectonic elements of the range in N-S direction, which possibly occurred in late Tertiary time, and postdated the right-lateral shear. This is a significant discovery for revealing characteristics of the Tertiary intracontinental deformation of the Gaoligong range and the interaction between the Indian and the Eurasian continents.     

小波包分析在乏燃料剪切机故障诊断中的应用

针对乏燃料剪切机剪切声音信号特征提取的难题,利用小波包分析方法,对不同磨损状况刀具的剪切声音信号进行小波包变换,提取变换信号的各频段归一化能量特征向量,根据声音信号的能量特征向量可辨识不同状况的乏燃料剪切机剪切声音,从而实现乏燃料剪切机故障诊断.实验表明,该特征向量能有效识别刀具的正常磨损、一级磨损、二级磨损三种状况,有效解决了基于隐马尔可夫模型的故障模式识别中特征提取的问题.     

打枝剪刀刃曲线的研究

本文根据滑动切削省力的原理，推导出对数螺施线可作为打枝剪的刀丸曲线。曲线的极径ｐ１，ｐ２值与剪切的树林枝丫直径，刀片材料及刀片安装尺寸有关。     

QH11D─WK数控精密剪板机的研制

阐述了作者研制的ＱＨ１１Ｄ－ＷＫ数控精密剪板机的工作原理、结构特点以及性能和主要技术参数，同时介绍了数控系统的硬件组成和软件设计。     

暗支撑高度变化时十字型短肢剪力墙非线性分析

利用ANSYS 对8个带暗支撑的十字型钢筋混凝土短肢剪力墙进行单调荷载作用下的非线性有限元分析,比较了在暗支撑布置高度变化时,剪力墙的承载能力、刚度和变形能力变化情况,分析了带暗支撑的十字形短肢剪力墙的暗支撑位置对构件的极限荷载和破坏形态的影响,揭示该型短肢剪力墙结构的真实力学行为,得出暗支撑在十字形短肢剪力墙的上下两端附近时对抗震最为有利的结论.为实际工程的截面设计提供依据.     

线阵CCD用于热轧带钢头部形状检测

本文将线阵ＣＣＤ用于热轧带钢头部形状检测，提出空间坐标对应概念，给出图像二值化相关参数选取指导思想；针对带钢头部形态特殊性给出输入图像的滤波方法。实验效果良好。     

Interaction between adjacent left-lateral strike-slip faults and thrust faults: the 1976 Songpan earthquake sequence

Based on the published focal mechanisms we have built the fault model of the main shocks of the 1976 Songpan earthquake sequence and calculated the coseismic Coulomb stress changes in the region. The results show that most of the aftershocks had occurred in the region where the Coulomb stresses had been increased, indicating a triggering relationship between the main shocks and the aftershocks. We also show that the first main shock （Ms = 7.2）, which is a left-lateral slip event, had increased the Coulomb stresses by 5×10^5 Pa at the second main shock （a thrust event with Ms = 6.7）. Therefore, we conclude that the first main shock had triggered the second main shock. The third main shock is also a left-lateral event, however, the triggering relationship between the third main shock and the previous two events is less obvious. General model calculations show that there is a good triggering relationship between adjacent left-lateral slip fault and thrust fault, but triggering between parallel slip faults is rather weak.     

6200kN连铸飞剪机的剪切力

根据某钢厂小方坯连铸机的6200kN飞剪机在正常生产情况下测得的剪切力参数,对该剪机的受力情况、工作负荷进行了分析,同时对连铸方坯截面的温度分布及铸坯剪切截面的平均温度进行了分析计算。在此基础上,探讨用简单公式或图表计算剪切截面的平均温度和最大剪切力的方法。     

施罗曼飞剪动力学分析

本文利用复数向量和的方法,在IBM286上对施罗曼飞剪进行了运动学及刚体动力学分析,提出了根据剪切力的大小选择适当的剪切速度来降低支反力的观点。