蜂窝锥壳卫星适配器约束阻尼层振动抑制分析

Vibration Suppression of a Conical Honeycomb Satellite Adapter Subjected to Constrained Layer Damping

主要研究在蜂窝锥壳卫星适配器上附加约束阻尼来抑制锥壳传递振动。尽管约束阻尼方面的研究很多 ,但是大多数都是针对简单的梁或者板结构 ,而对复杂蜂窝锥壳结构的振动抑制问题研究还很少 ;为此 ,通过对蜂窝壳的等效化处理和约束阻尼结构的有限元建模理论分析 ,建立起卫星-适配器结构在有无附加约束阻尼情况下的有限元模型 ,进一步通过模态分析和频响分析 ,得到不同约束阻尼层设计参数对结构振动抑制影响规律。分析结果对于经济有效的设计约束阻尼层和结构减振减重具有较好的参考价值。

Conical honeycomb shell is a widely applied structure, especially in space engineering, such as satellite boards and satellite adapters. In this paper, to suppress vibration transmission through the conical honeycomb shell onto its connected structure, a constrained viscoelastic layer is applied on the shell surface. Although the constrained viscoelastic layer has been studied extensively in the past thirty years, studies have been mainly on beams and plates. With an equivalent model of honeycomb shell and theoretical analysis of Constrained Viscoelastic Layer (CVL),finite element models (FEM) of the adapter with and without CVL and the satellite are built. With modal analysis and frequency response analysis, influences of constrained layer design parameters on the vibration suppression effects are obtained. The results are essential to an effective and economical design of the constrained visoelastic layer, especially when there are strict restrictions on the weight and size of the structure.