Study The Mechanical Characteristics Of Steel-net Pad Damper In The High Temperature

Steel-Net Pad Damper belongs to a class of metallic damper. It is a kind of the nonlinearisolators with dry friction damping character. Possessing relatively large damping includinghysteresis friction, it can reduce the level of the vibration within a wide frequency band. Itsstiffness can became soften under unexpected large excitation, which helps to change the naturefrequency of the structure so as to avoid resonate. More advantages of Steel-Net Pad Damper havebeen recognized such as good ability of supporting large load, resisting impact. It can be used incomplex and bad environment including high and low temperature, smear, and corrosion. Itsmaintenance is easy and its dependability is high. This kind of vibration isolator is widely used inaeronautics and astronautics field, which promotes the study on it.So far, some achievements have been obtained about the dynamic characteristics of it, butBut mostly experimental study conducted in normal temperature. Only less literature review itschanges of damping in the high and low temperature conditions. Even so, They don’t have toomuch to consider dynamic characteristics with the change of temperature and frequency. Ofcourse also cannot consider temperature for him the influence of damping characteristics forSteel-Net Pad Damper. The main research purpose of this article is through a variety of hightemperature test to research and analyze the dynamic characteristics of Steel-Net Pad Damper.The highest temperature reached500°. Also studied the influence of temperature on the lowfrequency transient stiffness. At the same time, Analyses the temperature course changes affectthe performance of Steel-Net Pad Damper. Provide experiment basis for the future of this kind ofshock absorber design, and reduce the amount of test in design.In this paper, viscoelastic constitutive relation is used to equivalent the dynamic character ofsteel-net pad. An effective method of parameter identification is built. The material parametersidentified from experimental data are used to establish FEM model. Results show that thetheoretical solution fits the experimental curve well under300°, but it has the certain error above300°, and the error varies with temperature.