摘要
以1艘209 000 DWT Newcastle-Max型散货船为例,采用有限元方法对其上层建筑的振动特性进行数值计算,建立整船三维模型和主机机架模型,运用PCL编程实现螺旋桨脉动压力的自动加载;采用等效力偶法加载主机不平衡力矩;应用边界元法求解附连水质量;运用模态叠加法求解结构的稳态简谐响应,获得上层建筑的自由振动固有频率和强迫振动速度响应值,并讨论桥翼设计形式对振动的影响,为上层建筑的减振设计提供理论依据。
The numerical analysis of vibration characteristic of a 209 000 DWT bulk carrier＇ s superstructure was carried out by using FEM in this paper. A global 3- D FE model and main engine frame model were set up, the propeller pulsating pressure was applied automatically through secondary development of PCL language program,main engine＇ s unbalanced moments were applied with equivalent force couple method,added mass was calculated by boundary element method,modal superposition method was used to solve steady- state harmonic response,and then the free vibration natural frequency and forced vibration velocity response value of superstructure were obtained. The influence of different bridge wing design form on the vibration was discussed,The analysis results could provide references for the vibration reduction design of superstructure.
出处
《舰船科学技术》
北大核心
2015年第9期35-39,共5页
Ship Science and Technology
关键词
上层建筑
振动特性
激振力
自由振动
强迫振动
superstructure
vibration characteristic
exciting force
free vibration
forced vibration
