使用状态空间模态响应对重度阻尼结构的阻尼比率估计
Jungtae Noh1, Jae-Seung Hwang2, Maria Rosa Valluzzi3
1Department of Architectural Engineering, Dankook University, Yongin 16890, Republic of Korea.
Sensors (Basel, Switzerland)
|September 13, 2025
概括
一种新的基于状态和空间的模态分解方法准确地分析了高度水的结构. 这种振动控制技术精确地估计了缓冲比率和自然频率,以提高结构弹性.
科学领域:
- 结构工程 结构工程
- 机械工程 机械工程
- 振动分析 振动分析
背景情况:
- 传统的模态分析方法由于非典型的阻尼行为而与高度阻尼的结构作斗争.
- 有效的振动控制系统对于对抗地震和风力负荷的结构弹性至关重要.
- 准确的模式参数估计对于理解和预测结构性反应至关重要.
研究的目的:
- 提出一种新的基于状态空间的模态分解方法,用于分析高度水的结构.
- 从实验和模拟数据中准确地提取模态响应并识别模态属性.
- 克服传统方法在辨别复杂系统的模式性质方面的局限性.
主要方法:
- 开发了一种基于状态空间的模态分解技术.
- 将该方法应用于用油阻尼器对三度自由度系统的数值模拟.
- 通过在结构上进行实验验证实了这种方法,该结构具有调整的质量阻尼系统.
- 在解构的模态响应中分析了功率频谱,以计算减压比和自然频率.
主要成果:
- 基于状态-空间的模态分解准确地提取模态响应并识别模态属性.
- 该方法精确计算了高度化的结构的缩比和自然频率.
- 状态空间中的转移函数包括位移和速度组件.
- 通过评估这些组件的参与率,可以实现精确的模式参数估计.
结论:
- 拟议的基于状态和空间的模态分解对于分析高度化的结构是有效的.
- 与传统方法相比,这种方法提高了模式参数估计的准确性.
- 这些发现有助于改进振动控制系统设计和结构健康监测.
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