大型半潜船波浪弯矩间接监测方法研究

Indirect monitoring method of wave bending moment for large semisubmers⁃ible ships

为准确得到大型半潜船波浪弯矩监测结果,本文阐述了船体波浪弯矩间接监测传统方法,并基于某大型半潜船的全船有限元仿真验证该方法的精度。在船体波浪弯矩间接监测传统方法的基础上,提出一种稳定且精度较高的船体波浪弯矩间接监测的改进方法,利用C-最优设计法和D-最优设计法优化长基线应变仪的安装位置,并通过全船有限元仿真构建改进方法的数学模型。对国内某大型半潜船进行实船监测和全船有限元仿真,验证了改进方法的精度,并将改进方法的计算结果与装载计算机的计算结果进行对比以进一步验证改进方法的适用性。

This paper describes in detail the traditional indirect monitoring method of the wave bending moment of the hull to accurately obtain the wave bending moment monitoring results of large semisubmersible ships.Then,the accuracy of this method was verified based on the whole ship finite element(FE)simulation of a large semisubmersible ship.We also proposed an improved stable and high-precision method for indirect monitoring of ship wave bending moment based on the traditional indirect monitoring method of ship wave bending moment.The C-optimal and D-optimal design methods were used to optimize the installation position of the long baseline strain gauge,after which the mathematical model of the improved method was established through the whole ship FE simulation.The accuracy of the improved method was also verified through real ship monitoring and the FE simulation of a large semisubmersible ship in China.Finally,the calculation results of the improved method were compared with those of the loading computer to further verify the applicability of the improved method.