弹性底板上的液压支架底座力学性能分析  

Mechanical Analysis of Hydraulic Support on Elasticity Floor

作　　者：王志[1,2,3] 倪和平 赵明皞[4,3] 

机构地区：[1]郑州大学力学与工程科学学院,郑州450001 [2]郑州煤矿机械集团股份有限公司博士后工作站,郑州450013 [3]郑州大学水利工程博士后流动站,郑州450001 [4]郑州大学机械工程学院,郑州450001

出　　处：《科学技术与工程》2014年第7期94-98,共5页Science Technology and Engineering

基　　金：河南省教育厅科学技术研究项目(12B130005)资助

摘　　要：基于Winkler和双参数弹性底板理论,建立液压支架底座与底板相互作用分析模型。通过初参数解得到了底板比压的分布规律以及底座内力。结果表明:当底板较软时,比压p分布较接近于塑性底板的比压分布,即呈梯形分布,随着基床系数k的增加,p呈明显的曲线分布,且在立柱作用处、前后连杆作用处较为集中,最大比压出现在立柱下方。Winkler和双参数模型计算下的p分布规律一致,按Winkler模型计算得到的p大于按双参数模型计算所得。当k太小时,底板太软,压陷量太大,容易导致底座沉陷;当k太大时,最大比压发生在立柱处,容易发生柱窝冲切破坏。底座最大弯矩M与剪力V都发生在柱窝处。随着k的增加,而立柱作用处M有所减小,V在非集中力作用段,随着k的增加剪力有所减小。Interaction analysis model of hydraulic support and rock floor was built based on Winkler and bi-pa- rameter elastic foundation theory. The distribution of the internal force of the base and the pressure of the floor distribution can be obtained based on the solutions of initial parameters. The results show that the pressure p distribution is trapezoidal when the floor is relatively soft, which is closer to the distribution of the plastic floor. With the increase of base beds coefficient k, the pressure p was obvious curve distribution and more concentrated at the position of the column, front shank and rear shank. The maximum pressure appear on the bottom of the column. The distribution result of Winkler model was consistent with the bi-parameter＇s and the value of the p of Winkler model was bigger than the hi-parameterS. Too small k means too soft floor and too large settlement and which easily lead to the base＇ s subsidence. Too large k would induce the punching damage of the column nest. The maximum bending moment M and shear V occur in column nest and decrease with the increasing of the k.

关 键 词：比压 WINKLER模型 双参数模型 底座 弹性底板 

分 类 号：O343.3[理学—固体力学]