垫高层开孔直径对垫高自由阻尼结构减振性能的影响研究  

Research on the Influence of Round Holes Diameter of Stand-off Layer on the Vibration Reduction Property of Perforated Stand-off Free Damping Structure

作　　者：桑英杰 吕平[1] 王旭[1] 黄微波[1] 方志强 孙鹏飞 Sang Yin gjie;Lv Ping;Wang Xu;Hua ng Weibo;Fang Zhiqia ng;Sun Pen gfei(School of Civil Engineering,Qingdao University of Technology,Qingdao Shangdong,266033,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《上海涂料》2022年第3期30-36,共7页Shanghai Coatings

摘　　要：为改善垫高自由阻尼结构的减振性能,降低结构质量,对垫高层进行开孔处理,并与基层和阻尼层黏结,制备带孔垫高自由阻尼悬臂梁。采用动态热机械分析法(DMA)分析了橡胶阻尼层材料和聚氨酯泡沫垫高层材料的动态力学性能,并且运用开孔垫高自由阻尼悬臂梁振动测试与ANSYS有限元模拟相结合的方法,分析垫高层开孔直径对带孔垫高自由阻尼悬臂梁的复合损耗因子、振动响应峰值以及模态频率的影响规律。结果表明:垫高层开孔直径从6 mm升至18 mm的过程中,悬臂梁的复合损耗因子先升高后降低,最高提升了11.8%,振动响应峰值和模态频率先下降后上升,最高分别提升了35.3%、5.09%。其中开孔直径为9 mm的试样减振效果最好,其一阶复合损耗因子为0.05848,振动响应峰值为4.26 m/(s^(2)·N),一阶模态频率为10.7 Hz。In order to improve the vibration reduction property of stand-off free damping structure and reduce the structure of mass,the stand-off layer was perforated and bonded with the base layer and the damping layer to prepare stand-off layer free damping cantilever beam with round holes.Dynamic mechanical properties of rubber damping layer materials and polyurethane foam pad materials were analyzed by dynamic mechanical analysis(DMA).Based on the vibration test and ANSYS finite element simulation,the influences of hole diameter on the compound loss factor,vibration response peak and modal frequency of stand-off free damping cantilever beams with holes were analyzed.The results showed that when the diameter of the hole in the stand-off layer increased from 6 mm to 18 mm,the composite loss factor of the cantilever beam increased firstly and then decreased,and the highest increase was 11.8%.The peak vibration response and modal frequency decreased firstly and then increased,and the highest increase was 35.3%and 5.09%respectively.The sample with a hole diameter of 9 mm had the best damping effect,the first-order composite loss factor was 0.05848,the vibration response peak was 4.26 m/(s^(2)·N),and the first-order modal frequency was 10.7 Hz.

关 键 词：垫高自由阻尼结构 复合损耗因子 减振 开孔直径 

分 类 号：O328[理学—一般力学与力学基础] TB123[理学—力学]