异步并联双级粘滞流体阻尼器的实验和理论研究

IF 4.6 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Structural Control & Health Monitoring Pub Date : 2024-07-26 DOI:10.1155/2024/6921518
Cantian Yang, Haoxiang Wang, Linlin Xie, Aiqun Li, Xinyu Wang
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引用次数: 0

摘要

大多数传统无源阻尼器的参数都是恒定的,这可能无法充分满足结构在不同荷载条件下的不同消能能力需求。开发性能可变的被动阻尼器已成为消能技术和智能结构的一个新兴和重要趋势。本研究提出了一种在不同变形水平下性能可变的新型被动粘滞流体阻尼器,称为异步并联双级粘滞流体阻尼器(APDVFD)。它有望在可变环形间隙的基础上表现出异步双级工作机制。在第一阶段,只有主活塞提供阻尼力。当变形达到预设值时,第一和第二活塞并行工作,同时提供阻尼力。活塞头采用圆孔设计,以提供足够的阻尼力。APDVFD 的双级工作机制和疲劳性能通过 46 种负载情况下的全尺寸实验进行了验证和研究。在此基础上,建立了能够预测 APDVFD 滞后行为的理论模型,并根据测试数据进行了验证。
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Experimental and Theoretical Investigations on an Asynchronized Parallel Double-Stage Viscous Fluid Damper

The parameters of most conventional passive dampers are constant, which may not sufficiently satisfy the different energy dissipation capacity demands of the structure under different load conditions. The development of passive dampers with variable performances has become an emerging and vital trend in energy dissipation technologies and smart structures. This study proposes a novel passive viscous fluid damper with variable performance under different deformation levels called an asynchronized parallel double-stage viscous fluid damper (APDVFD). It is expected to exhibit an asynchronized double-stage working mechanism based on a variable annular gap. In the first stage, only the primary piston provides the damping force. When the deformation reaches a preset value, the primary and second pistons work in parallel, providing a damping force concurrently. Circular orifices are adopted for the piston head to provide a sufficient damping force. The double-stage operating mechanism and fatigue performance of the APDVFD were validated and investigated through a full-scale experiment with 46 load cases. Based on these, a theoretical model capable of predicting the hysteretic behavior of the APDVFD was developed and validated against test data.

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来源期刊
Structural Control & Health Monitoring
Structural Control & Health Monitoring 工程技术-工程:土木
CiteScore
9.50
自引率
13.00%
发文量
234
审稿时长
8 months
期刊介绍: The Journal Structural Control and Health Monitoring encompasses all theoretical and technological aspects of structural control, structural health monitoring theory and smart materials and structures. The journal focuses on aerospace, civil, infrastructure and mechanical engineering applications. Original contributions based on analytical, computational and experimental methods are solicited in three main areas: monitoring, control, and smart materials and structures, covering subjects such as system identification, health monitoring, health diagnostics, multi-functional materials, signal processing, sensor technology, passive, active and semi active control schemes and implementations, shape memory alloys, piezoelectrics and mechatronics. Also of interest are actuator design, dynamic systems, dynamic stability, artificial intelligence tools, data acquisition, wireless communications, measurements, MEMS/NEMS sensors for local damage detection, optical fibre sensors for health monitoring, remote control of monitoring systems, sensor-logger combinations for mobile applications, corrosion sensors, scour indicators and experimental techniques.
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