摘要
以直接传动形式的船舶推进轴系为研究对象,基于连续-离散混合模型,开展推进轴系纵向振动动力吸振设计分析。采用直接法和模态叠加法计算比较推进轴系在螺旋桨脉动推力下的频率响应,识别出第1阶模态是优势模态。结合Lagrange方程和模态展开定理推导出推进轴系连续-动力吸振器离散混合模型的动力学方程,采用动力调谐优化方法对动力吸振器进行优化设计,在优化状态下讨论动力吸振器的控制效果和参数影响规律。分析结果表明:动力吸振器安装位置应尽可能接近螺旋桨端,以减小动力吸振器动力参数值;第1阶共振线谱的减振效果与动力吸振器安装位置无关,仅取决于其质量比。
The direct transmission type of marine propulsion shafting is taken as study object, and the analysis of dynamic vibration absorber(DVA) to control its longitudinal vibration is presented based on continuous-coupled model. The frequency response induced by oscillatory propeller thrust is calculated with direct solution method and mode superposition method. The first mode is proved as the dominant mode to contribute longitudinal vibration response of propulsion shafting. The dynamic equation of coupled model, making up of continuous model of propulsion shafting and discrete model of DVA, is derived by Lagrange equation and mode superposition theorem. The tuned optimal method is applied to optimize the parameters of DVA. In the optimal state, the control effect and parameter influence of DVA are discussed. The analysis result shows that the DVA should be attached close to propeller as far as possible in order to decrease dynamic parameter values of DVA. The attenuation of the first resonance is not related with the location of DVA, but is only depended on the mass ratio of DVA.
作者
张赣波
席敬波
ZHANG Ganbo;XI Jingbo(School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Department of Army Armament,Military Representative Bureau of Nanjing District,Military Representative Office of Hangzhou District,Hangzhou 310012,China)
出处
《船舶工程》
CSCD
北大核心
2020年第7期9-14,共6页
Ship Engineering
关键词
推进轴系
纵向振动
连续-离散混合模型
动力吸振器
propulsion shafting
longitudinal vibration
continuous-coupled hybrid model
dynamic vibration absorber
