一种快速船舶临界载荷数学模型设计
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摘要
为保证船舶船体结构安全,计算船舶临界载荷至关重要。在此背景下,针对切片理论、水弹性理论建立的模型计算精确度低的问题,设计一种新的快速船舶临界载荷计算数学模型,该模型建立主要依据有限元法,先建立一个船舶船体结构有限元模型,然后采用Patran的PCL语言对模型自动施加压力,最后根据得出的船体结构初始屈曲,利用半经验公式法确定船舶临界载荷。结果表明:与基于切片理论、水弹性理论建立的模型相比,本模型计算得出的船舶临界载荷与真实结果更为接近,误差最小,证明了本模型的精度更高,达到了研究目的。
In order to ensure the safety of ship hull structure, it is very important to calculate the critical load of ship. In this context, aiming at the accuracy of calculation of the model established by slice theory and Hydro elasticity theory, a new mathematical model of critical load for fast ships is designed. The model is established mainly on the basis of finite element method. Firstly, a finite element model of ship hull structure is established. Then, the model is automatically pressurized by using Patran's PCL language, and finally, the initial buckling of ship hull structure is considered. The critical load of the ship is determined. The results show that, compared with the model based on slice theory and Hydroelasticity theory, the calculated critical loads of ships by this model are closer to the real results and the error is the smallest, which proves that this method has higher accuracy and achieves the purpose of the study.
In order to ensure the safety of ship hull structure, it is very important to calculate the critical load of ship. In this context, aiming at the accuracy of calculation of the model established by slice theory and Hydro elasticity theory, a new mathematical model of critical load for fast ships is designed. The model is established mainly on the basis of finite element method. Firstly, a finite element model of ship hull structure is established. Then, the model is automatically pressurized by using Patran's PCL language, and finally, the initial buckling of ship hull structure is considered. The critical load of the ship is determined. The results show that, compared with the model based on slice theory and Hydroelasticity theory, the calculated critical loads of ships by this model are closer to the real results and the error is the smallest, which proves that this method has higher accuracy and achieves the purpose of the study.
引文
[1]张永强.特征载荷下海工管状结构屈曲临界载荷分析[J].船舶与海洋工程, 2017, 33(3):18–22.
[2]陈长雷.船舶结构强度分析中的分布载荷离散化研究[J].舰船科学技术, 2018, 40(12A):1–3.
[3]周陈炎,张佳宁,申亚洲,等.宽带随机载荷下船舶结构的两种疲劳直接计算方法[J].大连海事大学学报, 2018, 44(01):41–47.
[4]康习锋,张宏.基于ANSYS的管道屈曲临界载荷分析[J].油气储运, 2017, 36(3):262–266.
[2]陈长雷.船舶结构强度分析中的分布载荷离散化研究[J].舰船科学技术, 2018, 40(12A):1–3.
[3]周陈炎,张佳宁,申亚洲,等.宽带随机载荷下船舶结构的两种疲劳直接计算方法[J].大连海事大学学报, 2018, 44(01):41–47.
[4]康习锋,张宏.基于ANSYS的管道屈曲临界载荷分析[J].油气储运, 2017, 36(3):262–266.