《163000DWT油轮扭转振动计算》-毕业论文.doc

PAGE w 摘 要 轴系在工作过程中，承受着不断变化的扭矩、推力及弯曲力矩作用，因而船舶轴系在运动过程中可能产生以下三种形式的振动：扭转振动，回旋振动和纵向振动。本文主要针对扭转振动的计算进行软件系统的开发。船舶轴系在发动机、螺旋桨等周期性扭矩激励下所产生的周向交变运动及其相应变形即为船舶轴系的扭转振动。 在世界各国的船舶规范中，都列有共同的条款，凡是船用柴油机（主机或辅机）和气轮机动力装置，均必须通过扭转振动的计算，测试的检验，合格之后方可投入运营。 这是因为船舶轴系的扭转振动常常是造成严重事故的主要原因之一，而且扭转振动还常常会诱发船体、动力装置的强烈振动和噪声，传动轴系的断裂，发动机零件磨损的加剧等等问题。 随着柴油机功率、转速的不断提高，与其配套的动力装置样式也越来越多，出现严重的扭转振动现象也就逐步增加了，同时，对船舶轴系扭转振动的研究也得到了进一步的发展。 本文分析了我国轴系扭转振动研究的情况及与世界先进水平相比较的差距;简单介绍了扭转振动的一些理论和计算方法。并以163000DWT油轮为例编写了扭转振动计算的软件。用计算数据做校核计算，得出结论。 关键词: 船舶轴系；计算程序；扭转振动校核 w Abstract In the course of shaft to withstand the changing torque, thrust and bending moment of force, and thus shafting in motion that may arise during the following three forms of vibration: vibration, whirling vibration and vertical vibration. In this paper, the calculation of torsional vibration for software system development. Ship shaft in the engine, propeller and other periodic torque generated by excitation of weeks corresponding to the alternating movement and deformation of the ship is the shaft torsional vibration. Ship in the world specification, the terms are listed together, all marine diesel engines (main or auxiliary) gas turbine power plant, are required by the calculation of torsional vibration, test test, after passing can be put into operation. This is because the ship shaft torsional vibration is often one of the main causes of serious accidents, but also often induce torsional vibration of hull, power plant strong vibration and noise, drive shafts fracture, wear and tear of engine parts and so increase problem. With the?engine?power,?increasing?speed,?power plant?and its?supporting?style?more and more?severe?torsional?vibration?will?gradually?increase, while the?torsional vibration of?the ships?research has also been?further developed?. This article analyzes the study of torsional vibration conditions and compared with the world advanced level in the gap; brief introduction to some of the torsional vibration theory and calculation