摘要
对粘弹性包覆管路系统进行了理论及数值分析,基于复刚度法推导出了直管阻尼处理后的复合结构损耗因子为η=β(1-(1/(1+eA)),对弯管系统进行了固液耦合振动分析。因充液输送管路内脉动的随机性,用ANSYS对自由阻尼处理后直管及弯管进行了动力特性研究,结果表明,粘弹性自由阻尼处理对二者的减振效果相当明显,但当粘弹性包覆层厚度δ≥0.5mm时,再增大厚度对二者的衰减强度不是很有效。
This paper gives a theoretical and numerical analysis to piping system with viscoelastic coating,the analytic formulations of factor-loss on complex structure after damping in straight pipes is η=β（1-1/1＋eA）, which is derived by complex stiffness method, the fluid-solid vibration of syphon system is also analysed. Because of the pulsation is random in liquid-conveying pipe, the dynamic characteristic of straight pipes and syphon is studyed after free-damping by ANSYS, the result shows that obvious effect to both after free-damping with viscoelastic, but when the viscoelastic thickness δ ≥0.5 mm, the attenuation strength is not very effective along with the viscoelastic thickness is more and more bigger.
出处
《舰船科学技术》
2009年第1期56-59,共4页
Ship Science and Technology
基金
民口配套研制基金资助项目(JPPT-115-147)
关键词
结构损耗因子
固液耦合
动力特性
factor-loss on structure
fluid-solid coupling
dynamic characteristic
