摘要
通过对约束阻尼结构试样进行单点锤击实验,研究了约束层厚度和阻尼层厚度对约束阻尼结构振动性能的影响。分析了各组结构的振动幅值、振动加速度、振动加速度总级值和结构复合损耗因子。研究发现,当结构约束层厚度从40 mm增加至60 mm时,试样减振性能改善最明显。当结构约束层为80 mm厚时,3 mm厚阻尼层结构减振效果最好且阻尼层阻尼效率最高。当结构约束层为20 mm、40 mm和60 mm时,2 mm厚阻尼层结构减振效果最好且阻尼层阻尼效率最高。综合考虑结构性能、减振效率和经济因素,60 mm厚约束层、2 mm厚阻尼层为所研究试样中的最优组合。
The thickness influence of constrain layer and damping layer on vibration performance of the structure is studied by single point hammer test.Vibration amplitude,vibration acceleration,total vibration acceleration level value and compound loss factor are analyzed respectively.The result shows that the damping performance is improved obviously when the thickness of the structural constraint layer increases from 40 mm to 60 mm.When the thickness of the damping layer is 3 mm,the 80 mm-constrain layer structure has the best damping performance,and the damping efficiency of damping layer is the highest.The damping performance of the structure with 2 mmdamping layer is the best and the damping efficiency of damping layer is the highest,when the thickness of the constraint layer is 20 mm,40 mm and 60 mm respectively.Considering the structure performance,vibration reduction efficiency and economic factors,the structures which the thickness of constraint layer and damping layer are 60 mm and 2 mm respectively,which is the superior combination within the range of research.
出处
《科学技术与工程》
北大核心
2018年第2期199-203,共5页
Science Technology and Engineering
基金
国家自然科学基金青年基金(51408330)
青岛地铁科研课题类采购项目(M2-ZX-2015-63)
青岛市博士后基金(2016199)资助
关键词
约束阻尼结构
锤击实验
约束层厚度
阻尼层厚度
动态力学性能
constrained layer damping structure ham m e r test thickness of constrain layer thicknessof damping layer dynamic mechanical properties