总纵强度耦合作用下船体板架振动计算

船体在海上营运时，船体产生中拱状态弯曲和中垂状态弯曲，所以船体板架是处在复杂弯曲状态。以往船体板架振动计算都忽略了这种影响。本文讨论用有限元方法和原理应用于这类计算，推导了板架局部振动的计算方法，给出了计算实例。通过计算表明，本文方法可用于实际，为舰船振动校核计算提供了手段。

CALCULATIONS OF HULL GRILLAGE VIBRATION CONSIDERING THE COUPLED GIRDER LOADING

When a ship is operating at sea, its hull is in the bending conditions due to hogging or sagging and the hull grillage will, therefore, be subjected to the complex bending. The influence of this bending, however, has not been taken into account in the former calculation of the grillage vibration. In the present paper, the application of finite element method and its principle is discussed for this kind of calculations, a technique for the calculation of local grillage vibration is deduced and an example for calculation is given. The technique is demonstrated with calculation to be practical and can be used to provide a means as checking calculation of ship vibration.