单层球面网壳模型动力特性测试实验

聂桂波;范 峰;支旭东;戴君武

振动与冲击 ›› 2013, Vol. 32 ›› Issue (22) : 200-204.

PDF(2414 KB)
PDF(2414 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (22) : 200-204.
论文

单层球面网壳模型动力特性测试实验

  • 聂桂波1,范 峰2,支旭东2,戴君武1
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Dynamic characteristics test on single-layer reticulated dome

  • NIE Gui-bo1,FAN Feng2,ZHI Xu-dong2,DAI Jun-wu1
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摘要

为测定单层球面网壳模型振动台实验时的动力特性,进行噪声采集实验,剔除对实验干扰较大的各种环境噪声。通过模型在各种不同幅值白噪声及快速正弦扫频作用下动力响应确定实验所需测试幅值,测定模型的动力特性。通过锤击测定结构动力特性,并通过随机减量技术与HHT相结合方法对锤击结果进行分析。实验结果表明:网壳结构频率密集,各种环境噪声对实验结果干扰较大,应剔除环境噪声影响;采用快速正弦扫频、白噪声激励、锤击法均可准确测定结构的动力特性且结果相差不大。采用有限元软件ABAQUS对实验进行数值模拟,与实验结果对比分析表明,建模精确,有限元模拟可准确确定结构的动力特性。此可为模型振动台实验及结构抗震性能研究奠定基础。

Abstract

In order to measure dynamic characteristics of single-layer reticulated dome when conduct shaking table test. This paper first carries out the acquisition test of noise to eliminate large variety of environment noise interference around the shaking table; and then, the amplitude of white noise and fast sine sweep which is used to measure the dynamic characteristics is defined using the responses of the model under their different amplitudes; in addition, hammering method is also used to measure dynamic characteristics of the model. And then its results are analyzed using random decrement technique combined with HHT method. It can be found from test results that the frequencies of single-layer reticulated dome is intensive and the environment noise interference should be eliminated for their large effect on the test results. The results of dynamic characteristics are almost identical using the above three methods. Finite element model simulating the dynamic characteristics using ABAQUS is completed. Comparison results show that numerical results are in good agreement with test results which indicate that dynamic characteristics can be accurate simulate using ABAQUS based on accurate numerical model. The mentioned above lays the foundation for the further shaking table test and anti-performance research on reticulated shells.


关键词

单层球面网壳 / 动力特性测试 / 白噪声激励 / 快速正弦扫频 / 锤击法 / 数值模拟

Key words

Single-layer reticulated dome / dynamic characteristics measurement / white noise excitation / fast sine sweep / hammering method / numerical simulation

引用本文

导出引用
聂桂波;范 峰;支旭东;戴君武. 单层球面网壳模型动力特性测试实验[J]. 振动与冲击, 2013, 32(22): 200-204
NIE Gui-bo;FAN Feng;ZHI Xu-dong;DAI Jun-wu. Dynamic characteristics test on single-layer reticulated dome[J]. Journal of Vibration and Shock, 2013, 32(22): 200-204

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