Chinese Journal of Ship Research, Volume. 16, Issue 3, 128(2021)
A simplified method for structural fatigue analysis of hovercraft
Figures & Tables(15)
![[in Chinese]](/Images/icon/loading.gif){kind=icon}
Table 1. Distribution coefficients of each load component in different working conditions
View tableView in ArticleTable 1. Distribution coefficients of each load component in different working conditions
浪向 工况 静水弯矩 中垂弯矩 中拱弯矩 水平弯矩 迎浪 1 1 1 0 0 2 1 0 −1 0 斜浪 3 1 0.2 0 −0.2 4 1 0 −0.2 0.2 横浪 5 1 0.1 0 −1 6 1 0 −0.1 1
Table 2. Parameters of
S -N curve of aluminum alloyView tableView in ArticleTable 2. Parameters of
S -N curve of aluminum alloy名称 m K Sq 母材自由边 3 1.28×1011 29.5 焊接节点 3 2.5×1011 36.8
Table 3. Loads in the displacement mode
View tableView in ArticleTable 3. Loads in the displacement mode
载荷类型 数值 修正后数值 备注 静水弯矩/(kN·m) 4 400 4 400 中垂状态 垂向波浪弯矩/(kN·m) 17 488 3 934.8 中垂状态 垂向波浪弯矩/(kN·m) 20 629 4 641.5 中拱状态 水平波浪弯矩/(kN·m) 1 430 321.75 —
Table 4. Loads in the lifting mode
View tableView in ArticleTable 4. Loads in the lifting mode
载荷类型 数值 修正后数值 备注 静垫升弯矩/(kN·m) 5 430 5 430 中垂状态 垂向垫升弯矩/(kN·m) 19 760 4 446 中垂状态 垂向垫升弯矩/(kN·m) 17 662 3 973.95 中拱状态
Table 5. Nominal stress caused by hull girder load
View tableView in ArticleTable 5. Nominal stress caused by hull girder load
纵骨节点 编号 垫升状态 排水状态 迎浪1 迎浪2 迎浪1 迎浪2 随浪1 随浪2 横浪1 横浪2 1 −12.329 −1.818 −10.405 0.302 −6.492 −4.318 −5.903 −4.995 2 −12.329 −1.818 −10.405 0.302 −6.513 −4.297 −5.797 −4.914 3 −12.329 −1.818 −10.405 0.302 −6.524 −4.285 −5.740 −4.914 4 −11.743 −1.731 −9.910 0.287 −6.228 −4.068 −5.398 −4.680 5 −8.268 −1.219 −6.978 0.202 −4.399 −2.849 −3.728 −3.295 6 −8.268 −1.219 −6.978 0.202 −4.383 −2.866 −3.809 −3.295 7 −3.033 −0.447 −2.560 0.074 −1.642 −1.017 −1.228 −1.209 8 −1.709 −0.252 −1.442 0.042 −0.981 −0.517 −0.411 −0.681 9 3.544 0.523 2.991 −0.087 1.791 1.316 2.072 1.412 10 13.206 1.947 11.145 −0.323 6.871 4.707 6.735 5.263 11 10.999 1.622 9.282 −0.269 5.745 3.898 5.497 4.383 12 15.413 2.272 13.008 −0.377 8.063 5.450 7.640 6.143 13 19.096 2.815 16.116 −0.467 9.976 6.767 9.537 7.610 14 20.364 3.002 17.186 −0.498 10.656 7.197 10.079 8.115 15 20.458 3.016 17.266 −0.500 10.745 7.192 9.930 8.153 16 −2.245 −0.331 −1.895 0.055 −1.204 −0.765 −0.967 −0.895 17 22.035 3.249 18.596 −0.539 11.558 7.761 10.768 8.782 18 21.997 3.243 18.564 −0.538 11.525 7.760 10.815 8.766 19 −2.245 −0.331 −1.895 0.055 −1.192 −0.776 −1.024 −0.895 20 −2.245 −0.331 −1.895 0.055 −1.179 −0.789 −1.090 −0.895
Table 6. Hot-spot stress in different load cases
View tableView in ArticleTable 6. Hot-spot stress in different load cases
纵骨节点 编号 垫升状态 排水状态 迎浪1 迎浪2 迎浪1 迎浪2 随浪1 随浪2 横浪1 横浪2 1 −54.755 −38.243 −22.458 −6.629 −16.672 −13.458 −15.801 −14.459 2 −54.755 −38.243 −22.458 −6.629 −16.703 −13.427 −15.645 −14.339 3 −54.755 −38.243 −22.458 −6.629 −16.720 −13.410 −15.560 −14.339 4 −53.834 −38.108 −21.726 −6.650 −16.282 −13.088 −15.055 −13.993 5 −24.200 −13.128 −10.316 0.299 −6.504 −4.212 −5.511 −4.871 6 −24.200 −13.128 −10.316 0.299 −6.480 −4.237 −5.631 −4.871 7 5.322 9.325 −3.371 0.098 −2.162 −1.340 −1.617 −1.592 8 8.464 10.616 −1.813 0.053 −1.233 −0.650 −0.517 −0.856 9 15.253 10.789 3.759 −0.109 2.251 1.654 2.604 1.775 10 19.801 2.919 16.711 −0.484 10.302 7.058 10.098 7.891 11 16.491 2.431 13.918 −0.403 8.614 5.845 8.243 6.572 12 23.110 3.407 19.504 −0.565 12.090 8.172 11.455 9.210 13 27.269 4.020 19.291 −0.559 11.941 8.100 11.416 9.110 14 29.079 4.287 20.571 −0.596 12.755 8.615 12.064 9.714 15 29.214 4.307 20.667 −0.599 12.862 8.608 11.886 9.759 16 −800.714 −752.320 −789.639 −761.085 −788.553 −762.372 −788.182 −762.577 17 31.466 4.639 22.260 −0.645 13.835 9.289 12.890 10.511 18 31.412 4.631 22.222 −0.644 13.796 9.289 12.946 10.493 19 −800.714 −752.320 −789.639 −761.085 −788.535 −762.390 −788.272 −762.577 20 −800.714 −752.320 −789.639 −761.085 −788.515 −762.411 −788.374 −762.577
Table 7. Design stress range，damage degree and fatigue life
View tableView in ArticleTable 7. Design stress range，damage degree and fatigue life
纵骨节点编号 属性 排水航行状态 垫升航行状态 疲劳寿命/a 设计应力范围/(kN·m) 损伤度 设计应力范围/(kN·m) 损伤度 1 船底纵桁（燃油舱） 15.83 0.009 99 11.56 0.035 02 333.3 2 船底纵桁(燃油舱） 15.83 0.009 99 11.56 0.035 02 333.3 3 船底纵桁(燃油舱） 15.83 0.009 99 11.56 0.035 02 333.3 4 船底纵桁(燃油舱） 15.08 0.008 63 11.01 0.030 25 385.7 5 内底板纵桁 10.61 0.003 01 7.75 0.010 56 >1 000 6 内底板纵桁 10.61 0.003 01 7.75 0.010 56 >1 000 7 浮箱甲板纵桁 3.47 0.000 11 4.00 0.001 45 >1 000 8 气道纵桁 1.87 0.000 02 2.15 0.000 23 >1 000 9 气道甲板纵桁 3.87 0.000 15 4.46 0.002 02 >1 000 10 舷侧纵骨 17.20 0.012 81 16.31 0.098 31 135.0 11 纵舱壁纵桁 14.32 0.007 40 13.58 0.056 79 233.7 12 纵舱壁纵骨 20.07 0.020 37 19.03 0.156 30 84.9 13 甲板纵桁与横梁相交节点 19.85 0.019 71 22.46 0.256 77 54.3 14 甲板纵桁与横梁相交节点 21.17 0.023 90 23.95 0.311 38 44.7 15 甲板纵桁与横梁相交节点 21.27 0.024 23 24.06 0.315 74 44.1 16 装载甲板纵骨与横梁相交节点 28.55 0.058 66 33.88 0.881 59 16.0 17 甲板纵骨与横梁交接点 22.90 0.030 28 25.91 0.394 50 35.3 18 甲板纵骨与横梁交接点 22.87 0.030 12 25.87 0.392 47 35.5 19 装载甲板纵骨与横梁相交节点 28.55 0.058 66 33.88 0.881 59 16.0 20 装载甲板纵桁与横梁相交节点 28.55 0.058 66 33.88 0.881 59 16.0
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Shouqi TANG, Ning LIU, Huilong REN. A simplified method for structural fatigue analysis of hovercraft[J]. Chinese Journal of Ship Research, 2021, 16(3): 128
Paper Information
Category: Ship Structure and Fittings
Received: Sep. 5, 2020
Accepted: --
Published Online: Mar. 27, 2025
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