摘要
为了弥补实际加工中声学黑洞结构产生截断的问题,通过底部敷设阻尼材料对非理想声学黑洞薄板进行了减振研究.建立了非理想声学黑洞薄板模型,并研究了不同频率下的能量聚焦效应.利用有限元模型分析了敷设在黑洞下方区域不同半径和厚度的阻尼层对振动的抑制效果,同时搭建实验平台验证了仿真模型的准确性.结果表明,非理想声学黑洞薄板在中高频段下的振动能量中心聚焦程度大于低频频段,对结构的减振幅度随着阻尼层面积和厚度的增加而增大,敷设同一尺寸阻尼层的非理想声学黑洞薄板减振效果随着频率的升高而显著.
In order to make up for the truncation of the acoustical black hole structure during the actual machining,vibration reduction of the non-ideal acoustical black hole plate was studied by laying damping materials at the bottom.A non-ideal acoustic black hole plate model was established,and the energy focusing effect at different frequencies were studied.Finite element model was used to analyze the vibration suppression effect of the damping layer with different radius and thickness laid under the black hole,and the accuracy of the simulation model was verified by designing experiments.The results show that the focal degree of vibration energy center of non-ideal acoustic black hole plate in middle and high frequency band is larger than that in low frequency band,the vibration reduction amplitude increases with the increase of damping layer area and thickness,the vibration damping effect of non-ideal acoustic black hole plate with the same damping layer is significant with the increase of frequency.
作者
田晓
刘灿昌
胡红中
汪灿
曹帅康
TIAN Xiao;LIU Can-chang;HU Hong-zhong;WANG Can;CAO Shuai-kang(School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255049, China;School of Engineering, Yanbian University, Yanbian 133002, China)
出处
《陕西科技大学学报》
北大核心
2022年第3期152-156,163,共6页
Journal of Shaanxi University of Science & Technology
基金
山东省自然科学基金项目(ZR2020ME122)。
关键词
声学黑洞
非理想
能量聚集
阻尼减振
环氧树脂
acoustic black hole
non-ideal
energy focalization
damping vibration reduction
epoxy resin
