【摘要】 研究了应用共固化阻尼减振技术抑制某卫星星上飞轮支架的振动响应。共固化阻尼减振是一种将阻尼层嵌入复合材料铺层中并共固化成型从而提高结构阻尼能力的振动控制技术。首先,应用复合材料等代设计方法给出了无阻尼支架原型。然后,采用有限元法计算了原型支架关键模态的应变能分布规律,确定出阻尼材料铺敷位置。参数化研究了阻尼层铺层位置、阻尼层厚度对共固化阻尼减振效果的影响,确定了阻尼减振设计参数。最后,比较了共固化阻尼支架与无阻尼支架的随机响应,验证了共固化阻尼减振设计效果。更多还原

【Abstract】 The effectiveness of applying co-curing damping composite to reduce vibration response of a satellite flywheel bracket is demonstrated. Co-curing damping composite materials attract much attention for their high loss factor and adding almost no weight. Firstly,the baseline bracket was analyzed by finite element method to obtain distribution of modal strain energy. The front cover of the bracket where strain energy was concentrated was chosen to apply damping treatment. Then,parameter investigations of ply location,thickness of damping layer were carried to get optimal damping design. Random vibration response of damping bracket was compared with no damping one. Present results show that the co-curing damping treatment is an effective and compatible passive vibration control means for the brackets.更多还原