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	Study on the 2D Equivalent Simulation Model of Bearing and Spindle for Precision Machine Tools 期刊论文 OAI收割 MACHINES, 2023, 卷号: 11, 期号: 4, 页码: 16 作者: Xiu, Shijun; Li, Jibo; Chen, Xiangjun; Xia, Yifan; Wang, Pei \| 收藏 \| 浏览/下载：23/0 \| 提交时间：2024/01/07 angular contact ball bearing spindle 2D equivalent model finite element analysis axial stiffness contact stress
	Large-scale asymmetric pulverisation of fault zone: Insights from rock axial strain in static and dynamic loading conditions 期刊论文 OAI收割 INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2021, 卷号: 137, 页码: 9 作者: Ju, Minghe; Li, Xiaofeng; Li, Jianchun \| 收藏 \| 浏览/下载：28/0 \| 提交时间：2021/05/25 Fault zone Asymmetric pulverisation Rock stiffness Axial strain Cyclic dynamic load
	Identifying crack initiation stress threshold in brittle rocks using axial strain stiffness characteristics 期刊论文 OAI收割 JOURNAL OF MOUNTAIN SCIENCE, 2018, 卷号: 15, 期号: 6, 页码: 1371-1382 作者: Gao, MB; Li, TB; Meng, LB; Ma, CC; Xing, HL \| 收藏 \| 浏览/下载：25/0 \| 提交时间：2020/09/28 Brittle rock fracture Rock failure Sandstone Crack initiation stress Axial strain-stiffness Triaxial test
	Research of active supporting technology based on 400mm thin mirror (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China 作者: Liu X.-Y.; Wang J.-L.; Wang J.-L.; Liu X.-Y. 收藏 \| 浏览/下载：38/0 \| 提交时间：2013/03/25 Using a spherical mirror of 400mm diameter and 12mm thickness active supporting technology of thin mirror is researched. The axial support of the mirror is composed of 12 active supports and 3 fixed supports. The force actuator which is composed of displacement actuator and force sensor is installed in the active support. The mirror surface is tested by Zygo interferometer. For calibration each actuator exerts unit force alone and the surface variation is tested and taken as the response function of the actuator. The response functions of all actuators compose the stiffness matrix. Then the stiffness matrix is used by damped least square method to determine the correction force of each active support. In order to analyze the correction capability of the active supports 14 Zernike modes of the mirror surface are generated and tested respectively and 7 modes are selected for correction. Initially the RMS error of mirror surface is 1.16 I( =0.6328nm)when all actuators exert the same force. After 5 iterations the RMS error of mirror surface is reduced to 0.13 close to the original surface quality. 2010 Copyright SPIE - The International Society for Optical Engineering.
	Experiment study on mechanical properties of granite under repeated loading and unloading 会议论文 OAI收割 Daejeon, SOUTH KOREA, SEP 16-19, 2007 作者: Hu, Yun-Hua; Liu, Quan-Sheng \| 收藏 \| 浏览/下载：14/0 \| 提交时间：2018/06/05 brittle rock repeated loading-unloading axial stiffness acoustic emission