高阻尼复合材料支撑筒结构设计与材料工艺

支撑筒用于运载火箭与卫星之间的连接,支撑筒的阻尼减振效果决定了卫星能否正常工作。T700S/AG80复合材料制备的某支撑筒无法满足室温阻尼性能要求。本文通过两种途径提高了支撑筒的阻尼性能,第一种途径采用环氧丁腈预聚物861340共混改性AG80环氧树脂,当861340含量为23%时,改性树脂的阻尼性能最佳;第二种途径是对支撑筒进行分段铺层设计。共制备两个支撑筒1#和2#,1#采用未改性复合材料,2#采用阻尼改性复合材料以及分段铺层,在纵向振动试验中,与1#结构振动响应相比,2#结构的响应下降了60.5%;在横向振动试验中,与1#结构振动响应相比,2#结构的响应下降了20.7%。

Structural Design and Material Technology ofHigh Damping Composites Support Cylinder

Support cylinder is the connector of rocket and satellite. It will reduce the vibration response of satellite

through improving damping performance of the support cylinder. The support cylinder which is made of T700S

carbon fiber reinforced AG80 resin can not meet the damping requirement at room temperature. This paper expounded

two methods to increase its damping performance. The first was to select the modified 861340 as the matrix of the

composite. The result showed that when the content of 861340 was 23%, the damping performance was the best. The

second was to use the piecewise layer method which resulted from the technology of Constrained Layer Damping. Two

kinds of support cylinder were made as comparative experiments. 1# applied AG80 resin as matrix while 2# applied

modified 861340 and the piecewise layer method. Compared with 1#, the vibration response of 2# dropped 60. 5% in

the longitudinal vibration experiment. It was 20. 7% lower than 1# in the transversal vibration experiment.