Vibration Attenuation and Fatigue Analysis of the Large Flexible Articulated Boom under Wind Load and Vortex Shedding

大型柔性铰接臂在风载和涡流作用下的振动衰减和疲劳分析

基本信息

  • 批准号:
    513864-2017
  • 负责人:
  • 金额:
    $ 1.82万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Engage Grants Program
  • 财政年份:
    2017
  • 资助国家:
    加拿大
  • 起止时间:
    2017-01-01 至 2018-12-31
  • 项目状态:
    已结题

项目摘要

This project concerns with vibration attenuation and fatigue analysis of the towers and attached articulatedbooms in response to wind load and vortex shedding. The three-dimensional finite element model of the towersand booms are developed in HyperMesh, Ansys and RISA softwares. A comprehensive vibration analysis isconducted to identify first 10 natural frequencies and corresponding mode shapes of the structure, underdifferent possible booms configurations and loading scenarios. In order to demonstrate accuracy of the model,the results obtained from finite element analysis, in terms of natural frequency of the articulated boom, arecompared with those of the experiment. The experiment has been already conducted by STRUDES and theresults are available. The experimental results along with logarithmic decrement technique and modal analysisare used to extract damping of the structure. The findings obtained from the finite element simulation,experiments and vortex shedding analysis of the booms are used to identify under what circumstances theresonant frequencies of the structure are excited. Furthermore, the boom deflection under resonance excitationis evaluated. At the end, the critical components of the structure subject to fatigue failure, due to cyclic loads,are identified and their fatigue lives are computed to make sure the structure operates properly during 50 years,without any failure. Finally, appropriate vibration damping devices or tuned vibration absorbers will beoptimally designed to mitigate the extreme vibration due to vortex shedding.
本项目涉及塔架和连接的铰接式吊杆在风荷载和旋涡脱落作用下的减振和疲劳分析。在HyperMesh、Ansys和RISA软件中建立了塔架和臂架的三维有限元模型。在不同可能的吊杆构型和加载方案下,进行了全面的振动分析,以识别结构的前10个固有频率和相应的振型。为了验证模型的准确性,将有限元分析得到的铰接式臂架的固有频率与实验结果进行了比较。STRUDES已经进行了实验,并得出了结果。将试验结果与对数减量技术和模态分析相结合,提取了结构的阻尼值。根据有限元模拟、实验和臂架脱涡分析的结果,确定了在什么情况下结构的固有频率是激励的。此外,还对共振激励下的臂架挠度进行了评估。最后,识别出结构在循环荷载作用下发生疲劳破坏的关键构件,并计算其疲劳寿命,以确保结构在50年内正常运行,不发生任何破坏。最后,优化设计合适的减振装置或调谐减振器,以缓解涡流脱落引起的极端振动。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
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Sedaghati, Ramin其他文献

Design optimization and experimental evaluation of a large capacity magnetorheological damper with annular and radial fluid gaps.
The effect of magneto-rheological fluid on vibration suppression capability of adaptive sandwich plates: Experimental and finite element analysis
Vibration analysis of a multi-layer beam containing magnetorheological fluid
  • DOI:
    10.1088/0964-1726/19/1/015013
  • 发表时间:
    2010-01-01
  • 期刊:
  • 影响因子:
    4.1
  • 作者:
    Rajamohan, Vasudevan;Sedaghati, Ramin;Rakheja, Subhash
  • 通讯作者:
    Rakheja, Subhash
Effect of pre-strain on compression mode properties of magnetorheological elastomers
  • DOI:
    10.1016/j.polymertesting.2020.106888
  • 发表时间:
    2021-01-01
  • 期刊:
  • 影响因子:
    5.1
  • 作者:
    Vatandoost, Hossein;Sedaghati, Ramin;Hemmatian, Masoud
  • 通讯作者:
    Hemmatian, Masoud
Modeling and dynamic analysis of a vehicle-flexible pavement coupled system subjected to road surface excitation

Sedaghati, Ramin的其他文献

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{{ truncateString('Sedaghati, Ramin', 18)}}的其他基金

Modeling and dynamics of adaptive structures featuring multifunctional materials
多功能材料自适应结构的建模和动力学
  • 批准号:
    DGDND-2021-03482
  • 财政年份:
    2022
  • 资助金额:
    $ 1.82万
  • 项目类别:
    DND/NSERC Discovery Grant Supplement
Modeling and dynamics of adaptive structures featuring multifunctional materials
多功能材料自适应结构的建模和动力学
  • 批准号:
    RGPIN-2021-03482
  • 财政年份:
    2022
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Modeling and dynamics of adaptive structures featuring multifunctional materials
多功能材料自适应结构的建模和动力学
  • 批准号:
    DGDND-2021-03482
  • 财政年份:
    2021
  • 资助金额:
    $ 1.82万
  • 项目类别:
    DND/NSERC Discovery Grant Supplement
A System for Magnetic Characterization of Advanced Multifunctional Magnetoactive Soft and Hard Materials
先进多功能磁活性软硬材料磁表征系统
  • 批准号:
    RTI-2022-00552
  • 财政年份:
    2021
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Research Tools and Instruments
Modeling and dynamics of adaptive structures featuring multifunctional materials
多功能材料自适应结构的建模和动力学
  • 批准号:
    RGPIN-2021-03482
  • 财政年份:
    2021
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Analysis, Design Optimization and Control of Flexible Adaptive Structures to Attenuate Noise and Vibration
衰减噪声和振动的柔性自适应结构的分析、设计优化和控制
  • 批准号:
    RGPIN-2016-06696
  • 财政年份:
    2020
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Analysis, Design Optimization and Control of Flexible Adaptive Structures to Attenuate Noise and Vibration
衰减噪声和振动的柔性自适应结构的分析、设计优化和控制
  • 批准号:
    RGPIN-2016-06696
  • 财政年份:
    2019
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Analysis, Design Optimization and Control of Flexible Adaptive Structures to Attenuate Noise and Vibration
衰减噪声和振动的柔性自适应结构的分析、设计优化和控制
  • 批准号:
    RGPIN-2016-06696
  • 财政年份:
    2018
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Analysis, Design Optimization and Control of Flexible Adaptive Structures to Attenuate Noise and Vibration
衰减噪声和振动的柔性自适应结构的分析、设计优化和控制
  • 批准号:
    RGPIN-2016-06696
  • 财政年份:
    2017
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
A state-of-the-art test equipment for characterization of advanced rheological materials
用于表征先进流变材料的最先进的测试设备
  • 批准号:
    RTI-2017-00751
  • 财政年份:
    2016
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Research Tools and Instruments

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  • 批准号:
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