CAJ | 학술논문

为研究大型高频煤泥筛的动态特性,利用有限元软件,建立GFS2445型曲面筛实体模型,分析了筛机的固有特性和动力响应。结果表明：该筛机低阶模态分布较为集中,属刚体振型,运动形式为平动、转动、沉浮运动;高阶模态属扭转弯曲,频率均较高。在24 Hz频率下筛机各项动力学响应指标符合国家标准。筛机最大Von Mises应力远小于钢板的疲劳屈服极限,不存在应力集中破坏断裂现象。该研究为大型高频煤泥筛的设计改进及动态强度实验提供了理论依据。
위연구대형고빈매니사적동태특성,이용유한원연건,건립GFS2445형곡면사실체모형,분석료사궤적고유특성화동력향응。결과표명：해사궤저계모태분포교위집중,속강체진형,운동형식위평동、전동、침부운동;고계모태속뉴전만곡,빈솔균교고。재24 Hz빈솔하사궤각항동역학향응지표부합국가표준。사궤최대Von Mises응력원소우강판적피로굴복겁한,불존재응력집중파배단렬현상。해연구위대형고빈매니사적설계개진급동태강도실험제공료이론의거。
Aimed at investigating dynamic characteristics of large-scale high frequency slime sieve,this paper discusses the development of solid model of GFS2445-type curved surface sieve and the analysis of the natural characteristic and the dynamic response of sieve,by the finite element software.The results show that the low order modal distribution of the sieve is relatively concentrated,which belong to rigid mode,and presents the form of movement of translation、rotation、ups and downs movement of the whole structure;high order mode belong to torsion and bending,with a higher frequency.The selection of 24 Hz for working frequency of the sieve is relatively reasonable.In this frequency the various indexes of dynamic response of sieve are up to the national standard.The sieve with a Von Mises maximum stress far less than that of the yield limit of fatigue of the steel suffers from no stress concentration which causes damage fracture phenomena.The study provides necessary theoretical basis for design improvement and dynamic strength test study of large-scale high frequency slime sieve in the future.