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海况对大型船舶波激振动疲劳损伤的影响研究

华康 赵文斌 吴定凡

华康, 赵文斌, 吴定凡. 海况对大型船舶波激振动疲劳损伤的影响研究[J]. 中国舰船研究, 2021, 16(4): 1–7 doi: 10.19693/j.issn.1673-3185.02134
引用本文: 华康, 赵文斌, 吴定凡. 海况对大型船舶波激振动疲劳损伤的影响研究[J]. 中国舰船研究, 2021, 16(4): 1–7 doi: 10.19693/j.issn.1673-3185.02134
HUA K, ZHAO W B, WU D F. Study of sea states effects on fatigue damage of large ship prone to springing effect[J]. Chinese Journal of Ship Research, 2021, 16(4): 1–7 doi: 10.19693/j.issn.1673-3185.02134
Citation: HUA K, ZHAO W B, WU D F. Study of sea states effects on fatigue damage of large ship prone to springing effect[J]. Chinese Journal of Ship Research, 2021, 16(4): 1–7 doi: 10.19693/j.issn.1673-3185.02134

海况对大型船舶波激振动疲劳损伤的影响研究

doi: 10.19693/j.issn.1673-3185.02134
基金项目: 工信部高技术船舶科研资助项目([2017]614号)
详细信息
    作者简介:

    华康,男,1983年生,硕士,高级工程师

    赵文斌,男,1982年生,硕士,高级工程师

    吴定凡,男,1982年生,高级工程师

    通信作者:

    华康

  • 中图分类号: U661.4

Study of sea states effects on fatigue damage of large ship prone to springing effect

  • 摘要:   目的  针对大型船舶波激振动效应下的疲劳损伤问题,  方法  通过船模试验方法,比较两代400 000 DWT超大型矿砂船(VLOC)疲劳损伤的试验结果,分析船体梁波激振动效应下海况与疲劳的关系。通过递推方法,研究系列模型下的典型海况影响。  结果  结果表明,波激振动对疲劳的放大效应与有义波高和遭遇周期存在趋势关系。通过归纳递推方法,提出“主导海况”的概念,对疲劳损伤放大因子公式进行了修正;波激振动程度随海况的变化明显,波激载荷对疲劳损伤的放大效果随遭遇频率和有义波高的减小而增大。  结论  以“主导海况”代替多典型海况,可以在较短时间内获取相对准确的疲劳损伤放大因子,这对船舶设计初期有指导意义。
  • 图  1  大型矿砂船的试验模型

    Figure  1.  VLOC test model

    图  2  典型的垂向波浪弯矩时历曲线.

    Figure  2.  Typical time series of VBM with and without springing effect

    图  3  第1代400 000 DWT VLOC Fvib

    Figure  3.  Fvib of the 1st generation 400 000 DWT VLOC

    图  4  第2代400 000 DWT VLOC Fvib

    Figure  4.  Fvib of the 2nd generation 400 000 DWT VLOC

    图  5  第1代 400 000 DWT VLOC 的Fvib比较图

    Figure  5.  Fvib comparison graph of the 1st generation 400 000 DWT VLOC caculated by three methods

    表  1  两代400 000 DWT VLOC的海况

    Table  1.   Sea states of two generation 400 000 DWT VLOC

    序号第1代第2代
    Hs/mTz/HzHs/mTz/Hz
    12.57.52.57
    22.59.52.59
    32.511.52.511
    42.513.52.513
    54.57.54.57
    64.59.54.59
    74.511.54.511
    84.513.54.513
    96.57.56.57
    106.59.56.59
    116.511.56.511
    126.513.56.513
    138.57.58.57
    148.59.58.59
    158.511.58.511
    168.513.58.513
    下载: 导出CSV

    表  2  两代400 000 DWT VLOC的航速

    Table  2.   Speeds of two generation 400 000 DWT VLOC

    序号第1代的航速/kn第2代的航速/kn
    压载满载压载满载
    114.514.515.414
    214.514.515.414
    3141415.414
    4141415.414
    512121312
    612121312
    711111312
    811111312
    9991110
    10991110
    11881110
    12881110
    136687.3
    146687.3
    155587.3
    165587.3
    下载: 导出CSV

    表  3  疲劳损伤放大因子

    Table  3.   Fatigue damage vibration factor

    疲劳损伤放大因子Fvib
    压载工况满载工况
    第1代2.412.04
    第2代5.852.61
    下载: 导出CSV

    表  4  第1代400 000 DWT VLOC压载工况下的Fvib

    Table  4.   Fvib of the 1st generation 400 000 DWT VLOC under ballast condition

    Hs/mTz/s
    8.09.010.011.012.013.0
    2.512.05.12.92.21.71.3
    3.59.44.52.82.01.51.4
    4.59.24.52.81.91.51.5
    5.55.42.92.21.81.51.4
    6.53.72.42.01.71.51.4
    7.52.72.01.71.51.41.3
    8.52.31.81.61.41.31.3
    下载: 导出CSV

    表  5  第2代400 000 DWT VLOC压载工况下的Fvib

    Table  5.   Fvib of the 2nd generation 400 000 DWT VLOC under ballast condition

    Hs/mTz/s
    8.09.010.011.012.013.0
    2.546.821.47.82.22.01.6
    3.527.312.57.03.72.82.0
    4.525.811.86.93.92.92.0
    5.519.09.65.83.63.12.5
    6.516.98.95.53.53.12.7
    7.57.55.03.52.62.32.0
    8.53.73.12.52.01.91.7
    下载: 导出CSV

    表  6  第1代 400 000 DWT VLOC四海况等效疲劳放大因子

    Table  6.   Fvib_eq4 of the 1st generation 400 000 DWT VLOC

    Hs/mTz/s
    8.09.010.011.012.013.0
    2.512.05.12.92.21.71.3
    3.59.44.52.82.01.51.4
    4.59.24.52.81.91.51.5
    5.55.42.92.21.81.51.4
    6.53.72.42.01.71.51.4
    7.52.72.01.71.51.41.3
    8.52.31.81.61.41.31.3
    下载: 导出CSV

    表  7  计算的第1代 400 000 DWT VLOC的Fvib

    Table  7.   Calcuated Fvib of the 1st generation 400 000 DWT VLOC

    工况疲劳损伤放大因子Fvib
    模型试验修改公式原始公式
    压载2.412.412.32
    满载2.042.031.38
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-10-05
  • 修回日期:  2020-12-22
  • 网络出版日期:  2021-03-25

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