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弹性船体在大幅规则波中的弯矩响应特性分析
The response characteristics of elastic ship vertical bending moment in large amplitude regular wave seas
- DOI:
- 作者:
- 耿彦超, 蒋彩霞, 顾学康
GENG Yan-chao, JIANG Cai-xia, GU Xue-kang
- 作者单位:
- 中国船舶科学研究中心，江苏 无锡 214082
China Ship Scientific Research Center, Wuxi 214082, China
- 关键词:
- 弯矩;规则波;响应特性;砰击弯矩
vertical bending moment; regular wave; response characteristics; slamming moment
- 摘要:
- 具有大外飘结构的舰船在规则波中大幅运动时，若把船认为是刚体的，则船体弯矩响应除了有低频遭遇频率成分外，还有一定范围的倍频成分，若把船认为是弹性体，则弯矩响应除了上述成分外，还有一阶船体梁垂向总振动频率成分，且一阶船体梁垂向总振动频率也会放大倍频成分，而高频成分的大小直接影响舰船弯矩值的大小，从而对结构设计产生直接作用。本文针对2种类型的舰船开展计算和多个方案水池模型试验研究，分析舰船在规则波中的弯矩响应特性，进行时域与频域分析，也分析了尾砰击的特点。
When ship with big bow flare sail in severe regular wave seas, it will suffer nonlinear wave loads. The wave loads contain the low wave-encounter frequency and a lot of frequency components that are the numbers of wave-encounter frequency if the ship hull is rigid. If the ship is considered as flexible body. The wave loads contain the first order high frequency except those components. The first order frequency high whipping can enlarge lots of frequency components. Based on the calculation and basin model tests, this paper investigates the response characteristics of vertical bending moment and stern whipping in regular wave seas with time domain and frequency domain methods.
2023,45(2): 13-17 收稿日期：2022-05-30
DOI：10.3404/j.issn.1672-7649.2023.02.003
分类号：U661.4
作者简介：耿彦超(1982-),男,硕士,高级工程师,研究方向为船舶波浪载荷
