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弹性地基板模态试验及地基动参数识别

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Keywords: 道路工程,弹性地基板,模态试验,动参数识别,厚薄板通用元,刚体模态

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Abstract:

?用脉冲锤击法进行了弹性地基上自由板的自由振动模态试验,并用Me'scope软件分析传递函数,得到了7阶位移模态和应变模态。在此基础上,对试验结果进行了初步的分析并总结了弹性地基板振动测试的场地经验。对用优质LR12-2元建立的厚板ADS1元进行了Vlasov地基上矩形板的有限元分析,同时对Vlasov地基上板的振型进行了分析,利用刚体模态进行了Winkler地基参数识别,并利用2阶频率,根据模态振型匹配的原则进行双参数地基参数的识别。结果表明:该有限元分析程序具有较强的通用性,地基板的振型呈模态密集区的形式。

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