Vibration characteristics of composite reinforced cylindrical shells sandwiched with co-cured damping films
ZHOU Yuesong
SUN Xingshuai
LIANG Sen
KONG Jiali
ZHENG Minghui
ZHENG Changsheng
Abstract：In order to study the dynamic behavior of stiffened cylindrical shells with composite material sandwiched by co-cured damping films under the clamped boundary condition,the specimens of stiffened cylindrical shell with composite material sandwiched by co-cured damping films were prepared,and the dynamic modal test platform was set up.The fundamental frequency,damping ratio and modal shapes of stiffened cylindrical shell specimens were solved,and the accuracy of finite element model was verified.The influence of geometric parameters on structural vibration characteristics was further discussed by the numerical simulation method.The results show that,the fundamental frequency,damping ratio and modal shape of the structure will change abruptly when the height of stiffeners changes,and there is a suitable height value before the abrupt change to make the whole structure consider both damping and stiffness requirements;when the thickness of composite materials is constant,the fundamental frequency of the whole structure decreases gradually and the damping ratio increases gradually with the increase of the damping thickness or damping layer number of single layer;for the stiffened cylindrical shell of single layer damping composite materials,the closer the damping layer is to the inner skin,the higher the stiffness is,and vice versa,the damping capacity is better.
Keywords：Co-cured damping film embedded compositeReinforced cylindrical shellDynamic behaviorModal testNumerical simulation
Publication Date：2025-05-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 29-37 )