复合单元法在变截面梁自由振动中的应用 II:实验验证
omposite Element Method for the Free Vibrations Analysis of Beams with Variable Cross-section
对复合单元法(CEM)在变截面梁自由振动问题中的应用进行实验验证。通过对有两个阶梯和四个阶梯的悬臂梁进行模态测试，得到其实测的前几阶模态频率和相应的振型。在划分不同单元个数的情况下，将利用复合单元法和ANSYS软件所得的固有频率与实测结果进行比较分析。本文研究结果表明复合单元法所得的频率和振型与实测结果符合得较好，并且具有建模时自由度少，计算精度高的优点。
n experimental was conducted to verify the correctness of CEM for free vibration analysis of beam with variable cross-section. Two modal tests were conducted for beams with two steps and four steps, the first few modal frequencies and the associated mode shapes were obtained. For the cases of different elements, comparison on the natural frequencies was made for the results from the CEM, ANSYS and the measured ones. Results in this paper show that the results from CEM agree well with the measured ones. And the CEM has the advantages of small number of degrees-of-freedom in the modeling and high preciseness.
梁婉仪、刘亮、吕中荣、王爽、谢瑾荣
工程基础科学
复合单元法自由振动阶梯梁实验验证
composite element methodfree vibrationcantilever beams with multiple stepsnatural frequencieslaboratory verification
梁婉仪,刘亮,吕中荣,王爽,谢瑾荣.复合单元法在变截面梁自由振动中的应用 II:实验验证[EB/OL].(2009-09-27)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/200909-717.点此复制
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