Finite Element Analysis on Vibration Characteristics of an Offshore Floating Breakwater

Q2 Engineering

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI:10.32604/sdhm.2020.07457

Hong Yan, Dingguo Zhang, Liang Li, Xiaoyu Luo

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引用次数: 1

Abstract

The construction of seaside facilities is a hot topic in the field of ocean engineering. In this paper, a new type of floating breakwater is designed by 3DCAD geometric modeling. Based on the vibration theory and finite element technology, the floating breakwater model is optimized, and the modal analysis of the structure with the bracket as main body and blades as functional attachments is carried out. Natural frequencies and mode shapes of the blades are first calculated, and the effects of the natural frequencies in both dry and wet conditions are taken into account. Modal analysis and harmonic response analysis of the bracket with different lengths by removing the blades are also carried out, and the different variations of the natural frequencies between several bracket units are compared. The responses of the key position of the bracket under different loads and different bracket lengths are analyzed. The influence of liquid on the natural frequency of the blades and the influence of the length of the bracket on the natural frequency of the bracket are discussed in the fluid-solid coupling state. Research in this paper provides a data basis for the safety assessment of the breakwater construction.

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海上浮式防波堤振动特性的有限元分析

海滨设施建设是海洋工程领域的热点问题。本文采用3DCAD几何建模方法设计了一种新型浮式防波堤。基于振动理论和有限元技术，对浮式防波堤模型进行了优化，并对以支架为主体、叶片为功能附件的结构进行了模态分析。首先计算了叶片的固有频率和模态振型，并考虑了干、湿两种工况下固有频率的影响。对不同长度支架进行了模态分析和谐波响应分析，比较了不同长度支架单元间固有频率的变化规律。分析了支架关键位置在不同荷载和不同支架长度下的响应。在流固耦合状态下，讨论了液体对叶片固有频率的影响以及支架长度对叶片固有频率的影响。本文的研究为防波堤工程的安全性评价提供了数据依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

SDHM Structural Durability and Health Monitoring Engineering-Building and Construction

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： In order to maintain a reasonable cost for large scale structures such as airframes, offshore structures, nuclear plants etc., it is generally accepted that improved methods for structural integrity and durability assessment are required. Structural Health Monitoring (SHM) had emerged as an active area of research for fatigue life and damage accumulation prognostics. This is important for design and maintains of new and ageing structures.