Vibration reduction study of a simplified floating raft system by installing connecting nonlinear spring-mass systems

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-05-01 Epub Date: 2025-01-27 DOI:10.1016/j.tws.2025.113015

Xiaohong Mi , Yuhao Zhao , Qingchuan Zhan , Mingfei Chen

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Abstract

In marine engineering, some floating raft systems typically can be simplified as coupling plate structures in analyzing their vibration characteristics due to their structural characteristics, where they contain additional installation space between each sub-structure. Nonlinearities studied in the existing study can be designed as coupling elements to connect each sub-structure of the floating raft systems, which may play a positive influence on the vibration control of the floating raft systems. Against this background, this work proposes a theoretical vibration model of a simplified floating raft system (SFRS) attached to connecting nonlinear spring-mass systems (CNSMSs). Based on the correct results, vibration responses of SFRS attached to CNSMSs are studied. According to the numerical analysis, CNSMSs present multi-frequency vibration restraining characteristics, where the vibration of each subplate can be concurrently restrained by reasonably using CNSMS. Reasonable parameters of CNSMS are good for the vibration restraining of SFRS under resonance regions. Unreasonable parameters motivate complicated responses of SFRS. Furthermore, the vibration of each subplate can be concurrently restrained by reasonably using CNSMS. The introduction of CNSMSs provides a possible way to restrain the vibration of SFRS.

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安装非线性弹簧-质量连接系统的简化浮筏减振研究

在海洋工程中，由于浮筏系统的结构特点，在分析其振动特性时，通常可以将其简化为耦合板结构，其中每个子结构之间包含额外的安装空间。现有研究中所研究的非线性可以设计成耦合元件连接浮筏系统的各个子结构，这可能对浮筏系统的振动控制产生积极的影响。在此背景下，本文提出了连接非线性弹簧-质量系统的简化浮筏系统（SFRS）的理论振动模型。在正确的基础上，研究了CNSMSs连接的SFRS的振动响应。数值分析表明，CNSMS具有多频抑制振动的特性，合理使用CNSMS可以同时抑制各底板的振动。合理的CNSMS参数有利于SFRS在共振区域的振动抑制。不合理的参数激发了SFRS的复杂响应。此外，合理使用CNSMS可以同时抑制各底板的振动。CNSMSs的引入为抑制SFRS的振动提供了一种可能的方法。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.