通过将超大型浮式结构物(a very large floating structure，简称VLFS)模拟为黏弹性薄板，本工作对VLFS的非线性水弹性响应进行了解析研究。运用同伦分析方法(the homo-topy analysis method，简称HAM)，计算出速度势和板挠度的近似迭代解，并根据计算结果着重探究了几个重要的物理参数对黏弹性板形变的影响。结果发现:黏弹性板的挠度随着黏弹性时间、杨氏模量和板厚度增加而减少，而板挠度随着入射波波幅的增加而增加。最后，还对非线性色散关系和波幅之间的联系进行了探讨。
Nonlinear Analysis of A Viscoelastic Floating Structure
The nonlinear hydroelastic respond of a very large floating structure(VLFS),which is modeled as a thin viscoelastic plate,is studied analytically.With the aid of the ho-motopy analysis method(HAM),we derive the iterative solutions of the velocity potential and the plate deflection,and consider the influences of several important physical parameters on the viscoelastic plate.It is found that the deflection of the viscoelastic plate decreases when the retardation time of the plate,Young's modulus,and the thickness of the plate in-crease.While the deflection increases with an increasing wave amplitude of the incident wave.Further,the connection between the nonlinear dispersion relation and the wave ampli-tude is also discussed.
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