【作者】 徐炯；

【导师】 沈国光；

【作者基本信息】 天津大学 ， 港口、海岸及近海工程， 2004， 硕士

【摘要】 本文的目的是分析气浮筒结构的静稳性和动力响应的特性，文章分别采用理论分析和数值计算两种方法进行。A.静稳性方面由于已经有一定的研究成果，文章着重在还有争论以及较少被涉及的气浮筒受力分析和气浮筒的相似性对模型实验的影响两方面进行了讨论。通过计算给出了气浮筒群结构的恢复力和恢复力矩的无量纲曲线。计算了环境压力对气浮结构相似性的影响，并进而提出了一个修正公式。B.动力响应方面引入了一个计算模型，使得气浮结构也能使用源汇分布法计算波浪力。在这个模型的基础上，利用源汇分布的有限元边界元法和Green函数对一个四筒的气浮平台进行了计算。通过计算得出了波浪力以及一系列与动力响应有关的系数进而可以求得结构的动力响应。最后将求得的动力响应与已有文献的结果进行了比较。本文所建立的模型具有一定的合理性，编制的程序也具有较强的实用性,本文为有关气浮结构研究工作的进一步开展奠定了基础。更多还原

【Abstract】 This article is to analyse the characteristic of static stability and hydrodynamic response of air floating structure. Theoretical analysis and numerical calculate are used in the article.A. Static StabilityBecause of having some result which got from some research work done before, the paper emphasized two aspects. One is to analyse the force act on the structure which was not mentioned very clearly before, and the other is to discuss the influence when do model experiments without regarding to air’s similarity. We drew the force curve of the structure after calculation. Also calculated the influence arosed by circumstance pressure and brought forward a correct formula. B. Hydrodynamic ResponseWe imported a model so that wave force can be calculated by boundary element method. Based on the model we calculated an air floating platform which was structured by four canister. After knowing the wave force and a series of coefficients concerned, the hydrodynamic response of the structure can be got.After that we compared the response with the results got from experiments.更多还原