摘要
将船体简化成一根两端完全自由、质量和刚度沿船长方向分布不均匀的变截面梁,采用迁移矩阵法算出船体梁的固有频率和振形;将三维势流理论和结构动力学方程相结合,求出船体振动的主坐标,再利用模态叠加原理得到计算点的幅频位移响应;利用谱分析方法计算不同工况时的船体变形,并根据雷利分布得到其统计值。以某船为例,利用该方法计算船体相对变形,并对结果进行分析,得到了船体变形随着航速大小和浪向角改变的规律。
The hull is simplified into a completely free at both ends, the quality and stiffness along the length of the ship in the distribution of uneven cross-section beam. The natural frequency and shape of hull girder are calculated by using the migration matrix method. By combining the three-dimensional potential flow theory and the structural dynamic equation, it finds out that the main coordinates of the hull vibration, and then the modal superposition principle can be used to calculate the displacement response of unit amplitude. Finally, the hull deformation at different working conditions is calculated by spectral analysis method, and its statistical value is obtained according to the Rayleigh distribution. Taking certain ship as an example, the relative deformation of a ship is calculated according to the above calculation method. The result is analyzed and the discipline of the hull deformation with the speed and wave angle changes can be obtained.
作者
黄强
李辉
任慧龙
吴兆年
王宇博
HUANG Qiang LI Hui REN Huilong WU Zhaonian WANG Yubo(College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China)
出处
《船舶工程》
CSCD
北大核心
2017年第8期13-17,88,共6页
Ship Engineering
关键词
船体梁
模态分析
船体变形
水弹性
谱分析
hull girder
modal analysis
hull deformation
water elasticity
spectrum analysis
