小水线面双体船螺旋桨激励船体振动研究（英文）

发布时间：2019-05-20 11:03

【摘要】：文章研究了小水线面双体船的桨—轴—船体耦合系统在螺旋桨受宽带力激励下的纵向振动特性。建立了考虑周围流体介质作用的桨—轴—船体动态耦合系统的声振数值计算模型,经实船试验表明计算结果与试验结果吻合较好。采用该模型计算分析了桨—轴—船体耦合系统的振动特性。作用在螺旋桨上的激励力传递到船体时,受到轴系子系统的调制作用及推力轴承基座结构的刚度影响,在轴系一阶和二阶纵向振动模态处出现动力放大;考虑螺旋桨的弹性变形时,激励力在螺旋桨的桨叶若干纵向振动模态频率上也出现了明显的放大。在这些低频段的振动模态频率上,船体结构受放大的激励力作用,容易产生共振及声辐射。
[Abstract]:In this paper, the longitudinal vibration characteristics of the propeller shaft and the hull coupling system under the excitation of the broadband force of the propeller are studied in this paper. The acoustic vibration numerical model of the dynamic coupling system of the propeller shaft with the effect of the surrounding fluid medium is established. The experimental results show that the calculated results are in good agreement with the test results. The vibration characteristics of the coupling system of the propeller shaft and the hull are analyzed by using the model. when the excitation force acting on the propeller is transmitted to the ship body, the influence of the modulation action of the shafting sub-system and the rigidity of the thrust bearing base structure is affected, the power amplification is generated at the first-order and second-order longitudinal vibration modes of the shafting, and when the elastic deformation of the propeller is taken into consideration, The excitation force also shows a significant increase in the frequency of several longitudinal vibration modes of the blades of the propeller. At the frequency of the vibration mode of these low-frequency segments, the hull structure is acted on by the amplified excitation force, and the resonance and acoustic radiation are easily generated.
【作者单位】：中国船舶科学研究中心船舶振动与噪声重点实验室;
【分类号】：U661.44

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