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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Semi-active vibration control of MRF core PMC cantilever sandwich beams: Experimental study
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Semi-active vibration control of MRF core PMC cantilever sandwich beams: Experimental study

机译：MRF核心PMC悬臂夹层梁的半主动振动控制：实验研究

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摘要

The semi-active vibration control of sandwich beams made of chopped strand mat glass fiber reinforced polyester resin polymer matrix composite (PMC) and magnetorheological fluid (MRF) core were experimentally investigated in this study. Two-, four- and six-layered glass fiber reinforced polyester resin polymer matrix composites were prepared using the hand-layup technique. The magnetorheological fluid was prepared in-house with 30% volume of carbonyl iron powder and 70% volume of silicone oil. Nine cantilever sandwich beams of varying thicknesses of the top and bottom layers glass fiber reinforced polyester resin polymer matrix composite beams and middle magnetorheological fluid core were prepared. The magnetorheological fluid core was activated with a non-homogeneous magnetic field using permanent magnets. The first three modes, natural frequencies and damping ratios of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams were determined through free vibration analysis using DEWESoft modal analysis software. The amplitude frequency response of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams through forced vibration analysis was determined using LabVIEW. The effect of various parameters such as magnetic flux density, thickness of glass fiber reinforced polyester resin polymer matrix composite layers and magnetorheological fluid core layer on the natural frequencies, damping ratio and vibration amplitude suppressions of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams was investigated. Based on the results obtained, 2 mm thickness top and bottom layers glass fiber reinforced polyester resin polymer matrix composite and 5 mm thickness magnetorheological fluid core sample have achieved a high shift in increased natural frequency, damping ratio and vibration amplitude suppression under the influence of magnetic flux density.
机译：通过实验研究了短切毡玻璃纤维增​​强聚酯树脂聚合物基复合材料（PMC）和磁流变液（MRF）芯制成的夹层梁的半主动振动控制。使用手糊技术制备了两层，四层和六层的玻璃纤维增​​强聚酯树脂聚合物基复合材料。内部用30％体积的羰基铁粉和70％体积的硅油制备磁流变液。制备了九个不同厚度的顶层和底层玻璃纤维增​​强聚酯树脂聚合物基复合梁和中间磁流变液芯的悬臂夹层梁。磁流变液芯通过使用永磁体的非均匀磁场激活。通过使用DEWESoft模态分析软件进行自由振动分析，确定了玻璃纤维增​​强聚酯树脂聚合物基复合材料-磁流变液芯夹层梁的前三种模式，固有频率和阻尼比。利用LabVIEW确定了玻璃纤维增​​强聚酯树脂聚合物基复合磁流变流体芯夹心梁的振幅频率响应。磁通密度，玻璃纤维增​​强聚酯树脂聚合物基复合材料层和磁流变流体芯层的厚度等参数对玻璃纤维增​​强聚酯树脂聚合物基复合材料的固有频率，阻尼比和振动幅度抑制的影响研究了液芯夹层梁。根据获得的结果，厚度为2 mm的顶层和底层玻璃纤维增​​强聚酯树脂聚合物基复合材料和厚度为5 mm的磁流变液芯样在磁影响下的固有频率，阻尼比和振动振幅抑制的增加均实现了高偏移通量密度。

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