某大型公务船的振动性能评估

Evaluation of vibration performance of large public service ship

采用有限元法评估了某大型公务船的振动性能,包括主机激励和螺旋桨激励下的全船总振动响应,以及上层建筑、后桅和雷达桅的局部振动响应。计算结果表明全船总振动性能良好,但后桅和雷达桅部分结构振动较为剧烈。通过改进设计,最终使全船振动性能满足ISO 6954(1984)的振动标准。

This paper evaluates the vibration performance of the large public service ship by the finite element method, including the global vibration responses under the exciting forces from the main engine and the propeller,and the local vibration responses of superstructure, rear mast and radar mast. The results indicate that the ship has the great global vibration performance, whereas with the strong structure vibration at the rear mast and radar mast. After the improvement of the relative structure, the global vibration performance meets the requirement of ISO 6954(1984).