相关实验视频

Updated: May 9, 2025

Data Acquisition Protocol for Determining Embedded Sensitivity Functions

Data Acquisition Protocol for Determining Embedded Sensitivity Functions

Published on: April 20, 2016

对于有效的液压结构信息挖掘的时空张量分析,考虑环境激发和振动响应

Hui Li¹, Zhang Han^2,3, Tengfei Bao³

¹Department of Hydraulic Engineering, Henan Vocational College of Water Conservancy and Environment, Zhengzhou, 450008, Henan, China. lh@hhu.edu.cn.

Scientific reports

|May 2, 2025

概括

这项研究引入了一种用于液压结构的新同步除尘技术,提高了损坏诊断的准确性. 该方法有效地从多点振动数据中提取关键信息,改善结构健康监测.

科学领域:

土木工程土木工程是指土木工程.
结构健康监测结构健康监测
非线性动力学是一种非线性动力学.

背景情况:

在液压结构中,基于振动的损伤诊断依赖于响应数据,但噪音和无效信息降低了准确性.
液压结构是复杂的,非线性,开放的系统受到环境因素的影响,使单点信号分析复杂化.
现有的单点无声化方法可能会导致过度或不足的无声化,导致不准确的有效信息提取.

研究的目的:

开发用于液压结构中多点振动响应数据的同步无声技术.
在复杂的结构系统中提高损害诊断的准确性和有效的信息挖掘.
克服传统单点信号处理方法的局限性.

主要方法:

使用改进的自适应变化模式分解方法,将多点振动数据转换为3D时空张量.
基于克兰克-尼科尔森式标准的因子过器集构造方法用于初步信号消噪.
时间加权的修改动态时间曲折理论和曲率平滑被结合起来,以创建一个最佳的过器模型,以有效地提取信息.

主要成果:

拟议的方法成功地消除了液压结构的多点振动响应数据.
从振动响应中准确地提取有效的信息,克服过度和不足的噪声问题.
使用门模型数据进行实验验证,证实了该方法的有效性.

结论:

开发的同步除技术显著提高了对液压结构的基于振动的损坏诊断的准确性.
这种方法为复杂,杂的结构健康监测数据中有效的信息挖掘提供了强大的解决方案.
该研究为提高水力混凝土结构健康监测可靠性的验证方法做出了贡献.

关键词:

混凝土结构是混凝土结构.损害诊断损害诊断损害诊断损害诊断损害诊断有效的信息有效的信息.水利工程结构水利工程结构.非线性动态系统非线性动态系统时间空间张量分析分析.

更多相关视频

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

Published on: April 13, 2016

Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines

Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines

Published on: January 5, 2024

相关概念视频

Discrete Fourier Transform

Discrete Fourier Transform

The Discrete Fourier Transform (DFT) is a fundamental tool in signal processing, extending the discrete-time Fourier transform by evaluating discrete signals at uniformly spaced frequency intervals. This transformation converts a finite sequence of time-domain samples into frequency components, each representing complex sinusoids ordered by frequency. The DFT translates these sequences into the frequency domain, effectively indicating the magnitude and phase of each frequency component present...

Design Example: Creating a Hydraulic Model of a Dam Spillway

Design Example: Creating a Hydraulic Model of a Dam Spillway

Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.

Dynamic Modulus of Elasticity of Concrete

Dynamic Modulus of Elasticity of Concrete

The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...

Typical Model Studies

Typical Model Studies

Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.