海上浮式结构物的模糊运动响应分析初探

An Exploration into the Fuzzy Movement Response of Floating Structures at Sea

为进一步客观反映海上浮式结构在波浪中的运动响应,对其进行不确定性分析特别是模糊运动响应分析是十分必要的。运用模糊统计方法,并结合试验分析了波浪载荷及系泊约束的模糊性,对系泊结构的系统模糊性进行了初步描述,推导了相应的模糊运动方程。研究表明,模糊性因素的存在,按传统的确定性算法难以准确反映结构的真实受力及运动情况,先将波浪载荷等输入模糊化后再求解方程并结合试验数据综合确定系统的受力和运动,这是目前较有效的改进方法。

In order to make further clear the response of the floating structure to the movement of the wave, it is absolutely necessary to make an analysis of the uncertainty, especially of the fuzzy movement response. The fuzziness of the wave load and the mooring restriction are analyzed with the aid of the fuzzy statistical method and experiments in the paper, with the primary description of the systematic fuzziness made of the moored structure and the corresponding fuzzy motion equation deduced. The research shows that with the fuzzy factors existing, it is difficult to reflect the real forces and movement of the structure by means of the traditional method. Therefore, with wave loads fuzzy-treated before the solution of the equation, to determine the real movement of the system under forces with the help of the experimental data is found a comparatively effective method at present.