船舶上层建筑纵向振动固有频率估算

在参考了当的国内外常用的上层建筑纵向振动固有频率估算公式的基础上，运用统计回归和力学分析相结合的方法，提出了一个新的上层建筑纵向振动固有频率公式。该公式能够较全面的反映出影响上层建筑纵向振动的各种主要因素，不仅考虑剪切影响，而且还考虑回转影响。经对多条船上层建筑激振试验验证，用本文公式计算出上层建筑纵向振动固有频率与实测值接近，可满足工程上计算精度要求。本文公式可供船舶方案设计阶段使用。

Prediction of Natural Frequency of Superstructure Longitudinal Vibration

Based on the common formulae predicting the natural frequency of superstructure longitudinal vibrations, a new formula is presented in this paper by means of methods of statistics and mechanics analyses. Aside from the principal parameters of upper structure vibrations, the effect of rotational vibration is taken into special consideration. Calculations of many real-scale ships show that the formula presented here is of higher accuracy with reliable applications to vibration prediction in the preliminary stage of ship design.