避开外载激振频率的舰艇底部结构再设计方法研究

THE DESIGN METHOD OF THE BOTTOM OF A NAVAL SHIP FOR AVOIDING LOAD-FREQUENCIES

为避开外载激振频率，针对舰艇底部结构特点，研究了其结构再设计的方法。在设计参数选取、设计过程的确定、优化数值方法等方面作了深人研究，形成比较有效的避开激振频率的结构再设计方法。对复杂舰艇底部结构进行再设计，经较少迭代次数的运算，其固有频率的设计结果达到避开外载激振频率的要求，表明本文方法具有较强的实用性。

According to the characteristic of the bottom structure of a naval ship,this paper studies a designmethod to avoid load-frequencies. Some problems including the choice of design parameters,the determination ofdesign procedure and optimization method,etc. are analysed. A numerical example is given to illustrate the effectiveness of the present method.