共搜索到27124条信息,每页显示10条信息,共2713页。用时:0小时0分0秒484毫秒
rate and the distance between constraints and monitoring section was built on the concept of displacement completion rate. A method was put forward to choose optimal initial supporting time during tunnel...成率;开挖面效应;三维数值分析 中图分类号:TU45 文献标志码:A 文章编号:1672-7207(2015)08-3075-08 Method......
method. 3 Reliability analysis of TFRM 3.1 Dynamic stress of TFRM After displacement response, speed response and acceleration response have been obtained according to the dynamics equations of TFRM...J. Cent. South Univ. (2012) 19: 101-107 DOI: 10.1007/s11771-012-0978-5 Extremum response surface method of reliability analysis on two-link flexible robot manipulator ZHANG Chun-yi(张春宜)1, 2, BAI......
Finite difference method for dynamic response analysis of anchorage systemYAN Zhi-xin(言志信)1, 2, DUAN Jian(段建)1, 2, JIANG Ping(江平)1, 2, LIU Zi-zhen(刘子振)1, 2, 3, ZHAO Hong-liang(赵红亮)1, 2, HUANG Wen... model of anchorage system is established. The dynamic governing equation is expressed as finite difference format and programmed by using MATLAB language. Compared with theoretical method, the finite......
method. Fig.2 Scheme of model pile and strain-gauges’ position Fig.3 Relation between axial stress and depths Fig.4 Relation between axial displacement and depth From the two examples above...J. Cent. South Univ. Technol. (2007)04-0575-05 DOI: 10.1007/s11771-007-0110-4 Analytical method of load-transfer of single pile under expansive soil swelling FAN Zhen-hui(范臻辉)1, WANG Yong-he(王永和)1......
degree of automation, the unsatisfied accuracy of the device, the slow data transmission and the greater measurement errors. The development of the long range optical fiber displacement sensor as well... fiber displacement sensor is able to meet the requirements of the soft ground monitoring. And data can be accurately monitored by means of real-time or on-line continuously. Key words: fiber Bragg......
displacement. Some circular brazen and aluminum tubes were prepared and shaped into semispherical nosed nozzles to verify the present theory. Comparison of theoretical predictions and the corresponding experimental measurements reveals that predicted load-displacement and dissipated energy-displacement diagrams by theoretical formulas have a good correlation with the corresponding experimental curves......
calculation, in which the slight initial inclination of pile shaft and the elastoplasticity of soil were considered. Calculation methods of the maximum lateral displacement, the maximum bending moment... displacement, the maximum bending moment and the distance between the position of the maximum bending moment and ground all increase with the increase of the initial inclination angle of pile shaft. Influences......
道和采场,监测方案如表4所示.北区,中区矿体开采方案分别选用数值模拟最优结果即方案1,方案6. 本次现场监测选用YH02-G20型多点位移计测量斜坡道和围岩位移变化,其技术参数如表5所示. 表4 斜坡道和采场位移监测方案 Table 4 Monitoring scheme of displacement of ramp and stope 表5 多点位移计技术参数 Table 5 Technical parameters of multi-point displacement meter 由表5可知,量程大于数值模拟的最大位移量,灵敏度较高且温度范围广,因此可认为多点位移计能够准确测量斜坡道与围岩位移变化情况. 4.2 结果与分析 多点位移计安装完成后,定期(每月1次)采集数据,从2014年11月至2017年4月,共进行了30......
analysis of soil parameters for subway shield tunnel was conducted by the method of combining sensitivity analysis and numerical simulation. The FLAC3D software was used to simulate and analysis... neural network was built to calculate and analyze the nonlinear relationship between the soil deformation and its mechanical parameters. Then taking the measured displacement data as sample input data......
J. Cent. South Univ. Technol. (2008) 15(s1): 573-576 DOI: 10.1007/s11771-008-424-x Modeling of nanoplastic by asymptotic homogenization method ZHANG Wei-min(张为民), HE Wei(何 伟), LI Ya(李 亚), ZHANG.../layered silicate nanocomposite, which possesses excellent properties. The asymptotic homogenization method (AHM) was applied to determine numerically the effective elastic modulus of a two-phase......