防冲锚杆索吸能构件合理螺纹参数确定

Reasonable thread parameter determination numerical simulation of energy absorption component of anti-scour anchor cable

针对传统矿用锚杆锚索无法实现让压吸能的不足,为设计出满足防冲吸能要求的组合式锚杆索,对防冲吸能锚杆索的吸能构件中不同螺纹尺寸进行数值模拟研究,以确定满足设计要求的最优螺纹尺寸组合.利用ANSYS软件进行前处理、LS-DYNA进行求解计算,正交试验法进行结果分析,研究不同尺寸内螺纹吸能效果,考察各个因素对工作阻力的影响.结果表明:对构件工作阻力影响最大的参数是螺纹厚度,其次是螺距,最后是螺纹剪切高度.螺纹厚度越大,构件的工作阻力越大;螺距越大,构件的工作阻力越小;剪切高度为3 mm时,构件工作阻力最大;利用正交试验分析,得到满足设计要求的吸能构件螺纹最优尺寸为螺距10 mm,螺纹厚度4 mm,剪切高度3 mm.

For the traditional mining anchor and cable can＇t realize pressure release and energy absorption, and in order to design a kind of composite anchor cable to meet the requirements of anti-impact and energy absorption, the numerical simulation of energy absorption component thread parameter of anti-impact anchor cable is conducted. The study is aiming to determine the optimal thread sizes combination to meet the design requirements The ANSYS software is used to do pretreatment, LS-DYNA is used to do solving and numeration, and the results analysis is conducted through orthogonal test method. All these are used to study the energy absorption effect of internal thread with different sizes. Also the effects of various factors on working resistance are studied. The results show that the parameter affecting working resistance of component most greatly is thread thickness, the second is the pitch, and the final one is the shear height of thread. The larger the thickness of thread, the greater the working resistance; The larger the thread pitch, the smaller the working resistance; The working resistance of component is the largest, when the shear height is 3 mm; the optimal thread sizes of energy absorption component meeting the design requirements are obtained through the orthogonal test analysis. The optimal thread sizes are the pitch of 10 mm, the thread thickness of 4 mm and the shear height of 3 mm.