大型气浮沉箱拖航过程中的垂荡运动特性分析

发布时间：2018-03-18 23:23

本文选题：气浮沉箱　切入点：固有垂荡周期　出处：《哈尔滨工程大学学报》2016年12期 　论文类型：期刊论文

【摘要】：为防止大型气浮沉箱在浅水海域拖航中由于垂荡值过大造成触底,本文研究了气浮沉箱的垂荡运动特性。采用MOSES分析软件获得气浮沉箱在不规则波波浪下垂荡位移的响应,经Welch法分析得到气浮沉箱的固有垂荡周期;利用周期不同的规则波浪进行气浮沉箱拖航模拟,以此获得相应的垂荡运动位移幅值最大点对应的周期值范围。同时,分析了理论垂荡固有周期值的计算过程,并研究了不同吃水对气浮沉箱垂荡运动特性的影响。证明经过MOSES分析软件和功率谱估计得到的垂荡固有周期值是合理的,可以参与水动力学计算并作为选取附加质量因素时的参考值;随着吃水的加大或分舱内气压的减小,垂荡固有周期值有增大的趋势。
[Abstract]:In order to prevent the large air floating caisson from hitting the bottom in shallow water due to excessive heave value, this paper studies the droop motion characteristics of the air floating caisson. The response of the drift displacement of the air floating caisson in irregular wave waves is obtained by using MOSES software. The inherent hoisting period of the floating caisson is obtained by Welch method, and the period range corresponding to the maximum displacement value of the corresponding swing motion is obtained by using different regular waves of the periodic wave to simulate the towing of the air-floating caisson. At the same time, In this paper, the calculation process of theoretical sagging natural period value is analyzed, and the influence of different draught on the droop motion characteristics of air-floating caisson is studied. It is proved that the sagging inherent periodic value obtained by MOSES analysis software and power spectrum estimation is reasonable. With the increase of draught or the decrease of the pressure in the subdivision, the natural cycle value of the sagging increases with the increase of the draught or the decrease of the atmospheric pressure in the subdivision, which can be used as the reference value of the hydrodynamics calculation and the selection of additional mass factors.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;天津大学滨海土木工程结构与安全教育部重点实验室;天津大学建筑工程学院;
【基金】：国家自然科学基金项目(51309179);国家自然科学基金一般项目(14JCQNJC07000)
【分类号】：P742

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