船舶上层建筑端部应力状态试验研究

本文针对某船舯部上层建筑端部在航行中出现裂纹这一现象，运用相似理论设计了大比尺钢结构模型进行试验研究，测试了四种端部结构型式在同一载荷作用下端壁下缘垂向应力和水平应力以及端壁附近甲板的应力分布规律，得出了一些有价值的结论。

Experiment Research of Stresses along the Junction Lines

The stress condition is extremely complicated at the junction between ship superstructure and main hull.The abrupt change of the structural arrangement at the junction usually introduces high stress concentration.Furthermore,defects in structure design at this place will result in the damage of ship structure,and jeopardize ship navigation.Considering the face that crack did happen along the junction of the superstructure and the deck of some cruise ships,an experimental research work on a steel model is presented in this paper.The model was designed to satisfy the similitude principles compared with the prototype structure of an existing ship.The model has four types of the end structure.Through testing stress distribution by exerting the same magnitude of bending moment on these four types of the end structure,the solution with lower stress level is chosen to improve the end structure of the ship.The navigation of improved ship indicates that the experiment conclusions are correct and have guiding significance for the design of the end structure of the ship superstructure.