摘要
针对双层共振筛强度计算时惯性力难以施加的问题,提出了一种分别计算上下筛体强度的有限元建模技术.应用该建模技术建立了30 m2大型双层非线性共振筛的有限元模型,考虑两种危险工况,对该共振筛进行了动应力计算,给出了共振筛整体的应力分布规律,指出了危险应力区域,对系统的强度特性进行了评估.有限元动应力计算结果与实测结果吻合,说明模型建立以及参数的选择是合理的.
Put forward one modeling technique of the finite element method for computing dynamic stresses of the double decks of resonating screen separately, through which we can overcome the difficulty to apply the inertia forces on the whole double decks simultaneously. Two critical load cases were taken into account when computing the dynamic stresses of the 30 m^2 double-decks large-scale nonlinear resonating screen. According to the stresses distribution of the screen we found it＇ s dangerous stresses area and evaluated the intensity characteristics of the system. The model and selected parameters of the screen are rational because of the identity of the results between the results of calculations and the tests.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2006年第1期108-111,共4页
Journal of China Coal Society
关键词
非线性双层共振筛
强度
有限元法
建模
double-decks nonlinear resonating screen
strength
finite element method
modeling
