Grundlegende Untersuchungen zu Partikel-Haftkräften und ihrer Beeinflussung

颗粒粘附力及其影响的基础研究

• 批准号: 143118555
• 负责人: Professor Dr.-Ing. Siegfried Ripperger
• 金额: --
• 依托单位: Lehrstuhl für Mechanische Verfahrenstechnik (MVT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/143118555?language=en
• 关键词: Grundlegende; Untersuchungen; zu; Partikel; Haftkr; Grundlegende; Untersuchungen; zu; Partikel; Haftkr

Aim of the applied research project is the investigation of particle behavior on elastic and damping vibrating surfaces. For this purpose the earlier described Vibration Method will be used to determine adhesion force distributions on elastic substrates as plastic foils, sponges, fleece filters and membranes at varying atmospheric conditions. Using these deformable substrates, the elasticity and damping cause secondary vibrations which result in detachment forces fluctuating over the time.Because of this the clear correlation between detachment force and detachment event can get lost. To solve this problem, a piezo driven pulse generator will be used. Because of the high reproducibility concerning rise and rise time, the resulting acceleration can be controlled very well. A pulse is a singular event so the correlation between detachment force and detachment event remains clear.The dynamic answer of the investigated materials caused on a vibration or pulse agitation depends from the elastic and damping properties of the material. In the case of membranes fleece filter etc. an additional system damping because of the substrate structure has to be considered which values cannot be found in an easy way. So it will be investigated, how successful the damping can be determined, using the microscope laser vibrometer which is part of the experimental set-up for the Vibration Method.

应用研究项目的目的是研究弹性和阻尼振动表面的粒子行为。为此，先前描述的振动方法将用于确定弹性底物上的粘附力分布，因为塑料箔，海绵，羊毛过滤器和膜在不同的大气条件下。使用这些可变形的底物，弹性和阻尼会导致次要振动，从而导致脱离力在时间内波动。因为这可能会丢失脱离力与脱离事件之间的明显相关性。为了解决此问题，将使用压电驱动的脉冲发生器。由于有关上升时间和上升时间的可重复性很高，因此可以很好地控制产生的加速度。脉冲是一个奇异事件，因此脱离力与脱离事件之间的相关性仍然很清楚。对振动或脉冲搅拌引起的材料的动态答案取决于材料的弹性和阻尼特性。对于膜羊毛过滤器等，由于必须考虑底物结构，因此必须考虑哪个值以简单的方式找到值。因此，将研究如何使用显微镜激光振动仪确定阻尼的成功，这是振动方法实验设置的一部分。