管状间隔阻尼结构刚度参数分析

摘要

Segmented damping treatment could be used for tubular structure because of its short service life and frequent replacement.In order to achieve the ideal damping effect,it is necessary to improve the loss factor of the structure.The stiffness parameters will directly affect the loss factor of damping structure.The mathematical model of the stiffness parameters is established.Considering the material parameters and geometric dimensions of the structure cross-section,the calculation and analysis about the stiffness parameters are carried out.The results show that when the other parameters keep the same,stiffness parameter increases with the increase of interval number and the constrained layer and base layer elastic modulus ratio,as well as the thickness ratio.But stiffness parameter may also decrease with the increase of the thickness ratio when the specific value of constrained layer and base layer elastic modulus ratio is bigger while the interval number is smaller.The results can provide some reference for the study of damping treatment.%管状结构因其使用寿命较短、更换频繁等问题,需对其进行间隔阻尼处理.为了取得较为理想的减振效果,应提高结构的损耗因子,而刚度参数的选择会直接影响阻尼结构的损耗因子数值.建立了刚度参数的数学模型,在考虑结构的横截面材料参数及几何尺寸的条件下,对其进行了计算分析.结果表明,在管状结构其余参数一致的条件下,刚度参数会随着间隔数目及最外约束层与基层的弹性模量比值、厚度比值的增加而有不同程度的提高,但当约束层与基层的弹性模量比值较大以及间隔数较少时,刚度参数显现出随着厚度比的增大而减小的趋势.分析结果可为阻尼处理研究提供参考.