ModalCAD—Interactive Dynamic Characteristic Identification Software for Experimental and Operational Modal Analysis of Engineering Structures
ModalCAD—Interactive Dynamic Characteristic Identification Software for Experimental and Operational Modal Analysis of Engineering Structures
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ModalCAD - 用于工程结构实验和操作模态分析的交互式动态特性识别软件
DOI：
10.1520/jte102816
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
A. Bayraktar
中科院分区：
文献类型：
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作者：
Abdurrahman Sahin;A. Bayraktar
本文介绍了交互式比较动态特性识别软件ModalCAD的开发。该软件是为土木工程结构振动监测而开发的，并使用Mathworks开发的数学工具MATLAB构建。结构的模态分析由四个不同的步骤组成：数据收集，数字信号处理，确定模态参数（特征频率，阻尼比，模态形状和模态比例因子），模态数据显示/验证和模型更新。ModalCAD软件是处理模态参数识别和验证过程的强大工具。ModalCAD为测量数据的可视化和处理、系统模型的识别以及结构模态参数的确定和可视化提供了广泛的功能。该计划处置的图形用户界面，这使得它非常直观，易于处理。ModalCAD中使用了最常用的模态参数估计技术。操作向量法、复指数法和多参考时域法以用户友好的方式实现。通过按下按钮，用户将被引导完成输入-输出和仅输出模态分析的整个过程：预处理数据、系统识别、提取模态参数、动画显示模态形状和评估模型验证工具。该方案的可能性证明了与三维框架模型。可以说ModalCAD软件可以作为科研人员今后进行结构健康监测研究的科学工具。
In this paper the development of interactive and comparative dynamic characteristic identification software titled as the ModalCAD is described. The software is developed for vibration monitoring of civil engineering structures and constructed by using MATLAB, which is a mathematical tool developed by The Mathworks. The modal analysis of structures consists of four distinct steps: Data collection, digital signal processing, determination of the modal parameters (eigenfrequencies, damping ratios, mode shapes, and modal scaling factors) with modal data presentation/validation and model updating. The ModalCAD software is a powerful tool that deals with modal parameter identification and validation procedure. The ModalCAD offers extensive functionalities for the visualization and processing of the measurement data, the identification of system models, and the determination and visualization of the structure’s modal parameters. The program disposes of a graphical user interface, which what makes it very intuitive and easy to handle. The most common modal parameter estimation techniques have been used in the ModalCAD. The Operating Vectors method, Complex Exponential method, and Polyreference Time Domain method are implemented in a user-friendly way. By pushing buttons the user is guided through the whole process of input-output and output-only modal analysis: Preprocessing the data, system identification, extracting modal parameters, animating mode shapes, and evaluating model validation tools. The possibilities of the program are demonstrated with a three dimensional frame model. It can be said that the ModalCAD software can be used as a scientific tool in future structural health monitoring studies of researchers.