用于水下滑翔机宽带振动抑制的一维两级周期性隔振系统的振动分析模型

IF 1.5 4区 工程技术 Q3 ENGINEERING, MARINE
Yujun Liu, Jing Liu, Guang Pan, Qiaogao Huang
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引用次数: 0

摘要

周期性隔振系统在宽带振动控制中得到了有效应用。为进一步提高宽带振动衰减效果,本文提出了一种水下滑翔机两级周期隔振系统。通过多自由度弹簧质量模型方法,建立了一维两级周期性隔振系统的分析模型。为了说明所提出的两级周期性隔振器的优越性,计算并比较了 SDOF 隔振器、单级周期性隔振器和两级周期性隔振器的力传递比和波速传播常数。为了获得动态参数对隔振性能的影响,并以此作为双级周期隔振器的设计准则,在分析模型的基础上进行了参数研究。此外,还为水下滑翔机设计了两级周期隔振器。通过分析模型和有限元方法,研究了双级周期性隔振器与单级周期性隔振器的应用效果。分析模型的研究结果表明,所提出的双级周期性隔振器可以增强宽带振动抑制能力。参数研究结果表明,振动衰减带隙和衰减量在很大程度上受设计动态参数的影响,如周期性隔振器的质量单元和弹簧单元、两级隔振器的中间质量以及周期性单元的数量。在水下滑翔机的应用研究中,有限元结果验证了双级周期隔振器比单级周期隔振器具有更强的减振效果。在有限元模型验证之前,根据提出的分析模型进行的隔振评估具有良好的预测性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An analytical vibration model of a one-dimensional two-stage periodic isolation system for the broadband vibration suppression of an underwater glider
Periodic isolation system is effectively applied in broadband vibration control. To further enhance the broadband vibration attenuation effect, the paper proposes a two-stage periodic isolation system for an underwater glider. The analytical model of the one-dimensional two-stage periodic isolation system is developed through the multi-degree of freedom spring mass model method. For illustrating the superiority of the proposed two-stage periodic isolator, the force transmission ratio and the wave propagation constant of the SDOF isolator, the single-stage periodic isolator, and the two-stage periodic isolator are calculated and compared. In order to obtain the dynamic parameter influences on the vibration isolation performances as the design guidelines of the two-stage periodic isolator, the parametrical study is carried out based on the analytical model. Furthermore, a two-stage periodic isolator is designed for an underwater glider. The application effect of the two-stage periodic isolator is investigated through analytical modeling and finite element method, comparing to the single-stage periodic isolator. The research results from the analytical models show the proposed two-stage periodic isolator could strength the broadband vibration suppression. The parametrical study results demonstrate the vibration attenuation bandgap and attenuation amount are greatly influenced by the designed dynamic parameters, such as the mass unit and the spring unit of the periodic isolator, the intermediate mass of the two-stage isolator, and the number of the periodic cells. In application study of an underwater glider, the finite element results verify that the two-stage periodic isolator has more vibration attenuation effect than the single-stage periodic isolator. The vibration isolation assessment according to the proposed analytical model gives good predictive performance before the finite element model verification.
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来源期刊
CiteScore
3.90
自引率
11.10%
发文量
77
审稿时长
>12 weeks
期刊介绍: The Journal of Engineering for the Maritime Environment is concerned with the design, production and operation of engineering artefacts for the maritime environment. The journal straddles the traditional boundaries of naval architecture, marine engineering, offshore/ocean engineering, coastal engineering and port engineering.
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