线激励下船舶混合构型加筋板的振动特性

文章对某船发电机舱纵向混合构型加筋板的导纳特性进行了研究，运用模态叠加法求解了结构在线激励作用下各特征线上的等效导纳。计算结果显示，根据振动能量在结构上的分布，可按频段将导纳特性分为输入主控区和传递主控区。输入主控区导纳呈现带通特性，三个通频带与相应的筋条结构对应。通过改变筋条的参数可以单独控制加筋板某个频段的导纳特性。

Vibration characteristics of ship hybrid ribbed-plates subject to line excitation

Based on modal superposition method, this paper emphasized the line mobility of hybrid ribbed-plates subject to thread excitation, which is a typical vibration source on ships. Two identical regions were figured out from the calculated results, input control band and transfer control band. Line mobility of input control band presented band pass character, and three separatepass bands correspond to respective ribs. And, it is an effective way to control specific band by just changing ribs structure.