不对称船体结构动态特性研究

针对计算常规船舶结构动态特性的方法不适用于计算左右不对称横剖面船体梁动态特性的问题，本文将船体视为薄壁梁并离散成梁段，推导出迁移矩阵法迭代求解不对称船体结构固有及固有振型的公式系统，计算了左右不对称程度不同的梁结构及不对称船 梁的固有频率及振型。指出不对称梁 有振动为弯扭耦合振动，其固有频率与振动型的对应关系与对称梁不同。

ON DYNAMIC CHARACTERISTICS OF UNSYMMETRICAL SHIP STRUCTURES

For some peculiar ships with port and starboard structural unsymmetry about the longitudinal centre line, the conventional methods are unadaptable to estimate their dynamic characteristics as to the ship with symmetrical hull section. Based on dry model analysis of flexure-torsion coupling vibration of unsymmetrical ship structures a transfer matrix method to calculate natural frequencies and principal modes is described in this paper. The calculation has been carried out for an unsymmetrical ship structures and beams with unsymmetrical section. The comparison is made with symmetrical structures and showes the considerable differences.