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首页> 外文期刊>JP Journal of Solids and Structures >DYNAMIC ANALYSIS OF VIBRATING SCREENS - A CASE STUDY
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DYNAMIC ANALYSIS OF VIBRATING SCREENS - A CASE STUDY

机译：振动筛的动力分析-个案研究

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摘要

Vibrating screens have been extensively used in grading materials and in the coal industry. The service life of vibrating screens is important for reducing the cost of production and increasing productivity. A numerical model of the screen was considered herein for studying its dynamic behavior under certain boundary conditions. The applied loads were based on in situ measurements of kinematic variables (e.g., displacement, velocity or acceleration). The main goal of this study is to present an alternative and reliable methodology for predicting the stress distribution on the vibrating screen. First, one measures the vibration level of a vibrating screen under normal operation. Second, numerical simulations using Finite Element (FE) models were performed applying for instance the measured vibration levels on the FE model. Finally, the Von Misses stress levels are predicted. The main advantages of this method are twofold: reliability and cost-effectiveness. The test can be made simpler and in an ordinary quiet environment, as an adequate signal-to-noise ratio can be easily achieved. Besides, this technique allows physical insight into the behavior of structural systems found in commercial screens.
机译：振动筛已广泛用于分级材料和煤炭行业。振动筛的使用寿命对于降低生产成本和提高生产率至关重要。在此考虑屏幕的数值模型，以研究其在某些边界条件下的动态行为。施加的载荷是基于运动学变量（例如位移，速度或加速度）的原位测量得出的。这项研究的主要目的是提出一种可替代的，可靠的方法来预测振动筛上的应力分布。首先，在正常操作下测量振动筛的振动水平。第二，使用有限元（FE）模型进行数值模拟，例如在FE模型上应用测得的振动水平。最后，可以预测“冯小姐”的压力水平。这种方法的主要优点是双重的：可靠性和成本效益。由于可以轻松实现足够的信噪比，因此可以简化测试并在普通的安静环境中进行测试。此外，该技术还可以物理洞察商业屏幕中发现的结构系统的行为。

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