基于切比雪夫网格的自由曲面网格自适应及杆长优化

本文基于Rhino软件及其参数化设计插件Grasshopper,实现了切比雪夫网格在该平台的应用。首先针对自由曲面网格结构有曲面边界的特点,定义了切比雪夫网格的杆件类型;然后通过自动寻找曲面边界对自由曲面进行延伸,并在延伸后的曲面上生成切比雪夫网格,利用曲面边界进行裁剪;最后利用弹簧质点法对得到的边界网格进行杆长分组优化,同时能够保证网格形状基本不变。该方法能够在切比雪夫内部网格可控、均匀、流畅性的基础上有效减少杆长分组,方便切比雪夫网格的结构设计与施工。

Optimization of the fully grouted rock bolts for load transfer enhancement

The purpose of this study is to investigate the role of bolt profile configuration in load transfer capacity between the bolt and grout.Therefore,five types of rock bolts are used with different profiles.The rock bolts are modeled by ANSYS software.Models show that profile rock bolt T_3 and T_ with load capacity 180 and 195 kN in the jointed rocks,are the optimum profiles.Finally,the performances of the selected profiles are examined in Tabas Coal Mine by FLAC software.There is good subscription between the results of numerical modeling and instrumentation reading such as tells tale,sonic extensometer and strain gauge rock bolt.According to the finding of this study,the proposed pattern of rock bolts,on 7 + 6 patterns per meter with 2 flexi bolt(4 m) for support gate road.

一种康复训练机器人的机构设计及调节方法

针对下肢康复机器人存在操作复杂、难以实现所需训练轨迹、易形成异常步态等问题,提出了一种五杆变胞机构解决方法.针对不同身高、康复期的患者,精确调节调整杆摆动位置,使其变胞为可在矢状面内实现步态轨迹的四杆机构.探讨了不同身高患者选择杆件尺寸通用计算方法,并以某一身高为例进行计算,依据计算结果进行了变胞规律仿真试验、样机制作及临床试验,结果表明本文所设计机器人可根据需要现实多种训练轨迹.