...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials and structures >Identification of the viscoelastic properties of an asphalt mixture using a scanning laser Doppler vibrometer
【24h】

Identification of the viscoelastic properties of an asphalt mixture using a scanning laser Doppler vibrometer

机译：使用扫描激光多普勒振动计识别沥青混合物的粘弹性性能

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Estimating the master curve of the complex modulus of asphalt mixtures is essential for high quality and sustainable mixture and pavement design. There are multiple standard methods to estimate this master curve using hydraulic-pneumatic testing machines. These methods are complex to perform, need expensive equipment, and have constraints over the geometry of the testing samples. Therefore, the investigation of alternative methodologies to overcome these issues is of importance. In this research, an experimental setup coupled with a back-calculation technique is developed to identify the viscoelastic properties of an asphalt mixture using an optical measurement system. Using this system instead of traditional transducers eliminates the inaccuracies caused due to the attachment of a transducer to the specimen and allows feasible measurements on multiple points of the specimen. The developed method is compared with a standard method and an alternative method based on analytical formulas, and the results exhibit a good level of accuracy at a wide range of frequency and temperature. It is also demonstrated that even though this method can provide the master curve of a specimen with arbitrary geometry, the first natural frequency of the specimen at the highest temperature provides the first data point of the master curve at low frequencies. Therefore, the first natural frequency of the specimen should be considered while selecting the geometry of the test object.
机译：估计沥青混合物复杂模量的主曲线对于高质量和可持续的混合物和路面设计至关重要。使用液压气动试验机估算该主曲线有多种标准方法。这些方法是复杂的，需要昂贵的设备，并且在测试样本的几何形状上具有约束。因此，克服这些问题的替代方法的调查是重要的。在该研究中，开发了一种与背部计算技术耦合的实验装置，以使用光学测量系统识别沥青混合物的粘弹性性质。使用该系统而不是传统的换能器消除了由于换能器对样本的附着而引起的不准确性，并且可以在样本的多个点上进行可行的测量。将开发方法与基于分析公式的标准方法和替代方法进行比较，结果在频率和温度范围内具有良好的精度水平。还证明了即使该方法可以提供具有任意几何形状的样品的主曲线，最高温度下标本的第一自然频率提供了低频处的主曲线的第一数据点。因此，应考虑在选择测试对象的几何形状的同时考虑样本的第一固有频率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号