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船舶动力传动轴系的扭转振动,一般取决于发动机的激振力矩,但在某一定条件下,螺旋桨激振力矩也有十分重要的影响。本文根据轴系扭振的基本原理,认为螺旋桨激振力矩能起消振作用的条件,除了其振动圆频率和简谐次数与发动机激振力矩相同外,主要取决于螺旋桨激振力矩的初始相位角。据此,按不同振型推导出与发动机相匹配的能起最大消振作用的螺旋桨安装角φ_(opt)计算公式。
The torsional vibration of the ship power transmission shaft system generally depends on the excitation torque of the engine, but under certain conditions, the excitation torque of the propeller also has a very important influence. According to the basic principle of shaft torsional vibration, it is considered that the exciting moment of propeller can act as a vibration reducing vibration, except that the frequency and the harmonic harmonic frequency of the propeller are the same as the exciting moment of the engine, which mainly depends on the initial phase of the exciting moment of the propeller angle. Based on this, the formula of φ_ (opt), which can match the engine and can act as the maximum vibration reduction, is derived according to different modes.