摘要
为了研究叠层平板式筛网在电机激振作用下的动态响应,在RecurDyn软件中建立了三电机振动筛的多刚体仿真模型,并对模型进行了检验。基于有限元多柔体动力学(MFBD)技术,在刚体模型的基础上建立了筛箱与筛网的刚柔耦合多体动力学模型,通过对其仿真,得到筛网在处于不同振动轨迹、不同螺栓预紧力、不同支撑条件下的振动参数、被测点动应力值、应力云图等。分析结果表明:刚柔耦合模型能够更加准确的反应振动筛的抛掷指数;在一定范围内增大预紧力,能够使筛网动应力减小;增加筛箱支撑条数目能够使筛网受力更加均匀。
In order to study the dynamic responses of the shale shaker laminated flat-screen under the effect of vibration force from the motor, a multi-body simulation model of three-motor shale shaker was established and validated in RecurDyn. Based on the finite element multi-flexible-body dynamics （MFBD） technology, the rigidflexible coupling multi-body dynamic simulation model was established on the basis of rigid model, which is between shale shaker and screen. Through the simulation, the vibration parameters, the dynamic stress of measured points and the stress nephogram of screen were got which is under the different vibration trajectories, different bolt preload, different support conditions. The results showed that： the rigid-flexible coupling model can reflect the throw index of shaker more exact; to increase the bolt preload within a certain range can reduce the dynamic stress of screen; to increase the number of supports makes the screen stress more evenly
出处
《机械科学与技术》
CSCD
北大核心
2016年第7期998-1005,共8页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51074132)资助
