For a naval ship with a long strength superstructure and a lot of hatch, it is difficult to evaluate the hull girder's strength by general beam theory because of the complexity of the hull structure.

当舰船设有长度较长但开口较多的上层建筑时，其船体结构的复杂性使船体总强度很难用常规的梁理论方法确定。

youdao

Authors suggest a practical method based on dynamic analysis of finite element for modifying natural frequencies of hull grillage beam, and its software is completed.

提出一种基于有限元结构动力分析的船体板架固有频率实用修改方法，并进行了软件设计。

youdao

The method for torsional analysis of ship hull as a stepped thin-walled beam using the restrained torsion theory has been applied widely in the field of naval architecture.

将船体作为阶梯薄壁梁，用薄壁梁的约束扭转理论进行扭转强度分析的方法，是目前国内外造船界普遍使用的方法。

youdao