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首页> 外文会议>SAE Noise and Vibration Conference and Exhibition >Testing and Simulation of Anti-Flutter Foam and High Damping Foam in a Vehicle Roof Structure
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Testing and Simulation of Anti-Flutter Foam and High Damping Foam in a Vehicle Roof Structure

机译：车顶结构中防颤泡沫和高阻尼泡沫的测试和仿真

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The excitation of structural modes of vehicle roofs due to structure-borne excitations from the road and powertrain can generate boom and noise issues inside the passenger cabin. The use of elastomeric foams between the roof bows and roof panel can provide significant damping to the roof and reduce the vibration. If computer-aided engineering (CAE) can be used to predict the effect of elastomeric foams accurately on vibration and noise, then it would be possible to optimize the properties and placement of foam materials on the roof to attenuate vibration. The properties of the different foam materials were characterized in laboratory tests and then applied to a flat test panel and a vehicle body-in-white. This paper presents the results of an investigation into the testing and CAE analysis of the vibration and radiated sound power of flat steel panels and the roof from the BIW of an SUV with anti-flutter foam and Terophon high damping foam (HDF) materials. The test program was conducted using a scanning laser vibrometer to measure the surface vibration and a sound intensity probe to measure radiated sound power. The structural and acoustic responses of the panel and roof have been normalized to the input force. In parallel with the flat panel, finite element CAE simulation of the foam materials in the panel tests was performed and the results compared to the test results using different finite element (FE) foam modeling techniques. The results of this work are presented and discussed.
机译：由于来自道路和动力总成的结构 - 传承刺激而导致的车顶结构模式的激发可以在客舱内产生繁荣和噪音问题。在车顶弓和屋顶板之间使用弹性泡沫可以为屋顶提供显着的阻尼，并减少振动。如果计算机辅助工程（CAE）可用于预测弹性泡沫精确地对振动和噪声的影响，则可以优化垫在屋顶上的性质和放置以衰减振动。不同泡沫材料的性质在实验室测试中表征，然后施加到平坦的测试板和车身上。本文介绍了对扁钢板振动和辐射声音的测试和CAE分析的调查结果，并从SUV的BIV与抗颤动泡沫和Terophon高阻尼泡沫（HDF）材料的屋顶。使用扫描激光振动器进行测试程序，以测量表面振动和声强探头以测量辐射声功率。面板和屋顶的结构和声反应已被标准化为输入力。与平板平行，进行了面板测试中的泡沫材料的有限元CAE模拟，结果与使用不同的有限元（Fe）泡沫建模技术相比的测试结果相比。提出和讨论了这项工作的结果。

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