为研究对称切割法对船舶桨-轴系统回旋振动特性的影响，建立完整桨-轴系统、断叶桨-轴系统以及对称切割处理过的桨-轴系统，计入螺旋桨的陀螺效应，研究了3种模型的回旋振动特性。结果表明：单个桨叶折断以及对称切割处理，会提高桨-轴系统在该方向上的刚度，从而提高其正回旋固有频率；转速上升时，陀螺效应增大，3种模型的正回旋频率均不断增加，而逆回旋频率均不断降低，但3种模型的正回旋固有频率差距逐渐缩小，而逆回旋固有频率差距逐渐增大；桨叶折断增大了系统的不平衡度，导致后尾轴承处振动响应加剧，而对称切割处理可以有效降低系统的不平衡度，降低后尾轴承处的振动响应，提高航行安全。
In order to study the influence of symmetrical cutting method on the whirling vibration characteristics of ship propeller shaft system, the complete propeller shaft system, broken blade propeller shaft system and symmetrical cut propeller shaft system are established, and the whirling vibration characteristics of three models are studied by taking into account the gyro effect of propeller. The results show that the breaking of a single blade and symmetrical cutting treatment will improve the stiffness of the propeller-shaft system in this direction, so as to improve its normal whirling natural frequency; When the rotating speed increases, the gyro effect increases, the positive whirling frequency of the three models increases, and the reverse whirling frequency decreases. However, the difference of forward cyclotron natural frequency of the three models gradually decreases, while the difference of inverse whirling natural frequency gradually increases; Blade breaking increases the imbalance of the system, resulting in increased vibration response at the rear tail bearing. Symmetrical cutting treatment can effectively reduce the imbalance of the system, reduce the vibration response at the rear tail bearing and improve navigation safety.
2022,44(18): 11-14 收稿日期：2021-10-25
DOI：10.3404/j.issn.1672-7649.2022.18.003
分类号：U664.3
作者简介：李小军(1994-),男,硕士,工程师,研究方向为舰船动力装置故障诊断
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