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Application of Dynamic Analysis in Semi-Analytical Finite Element Method

机译:动态分析在半解析有限元法中的应用

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摘要

Analyses of dynamic responses are significantly important for the design, maintenance and rehabilitation of asphalt pavement. In order to evaluate the dynamic responses of asphalt pavement under moving loads, a specific computational program, SAFEM, was developed based on a semi-analytical finite element method. This method is three-dimensional and only requires a two-dimensional FE discretization by incorporating Fourier series in the third dimension. In this paper, the algorithm to apply the dynamic analysis to SAFEM was introduced in detail. Asphalt pavement models under moving loads were built in the SAFEM and commercial finite element software ABAQUS to verify the accuracy and efficiency of the SAFEM. The verification shows that the computational accuracy of SAFEM is high enough and its computational time is much shorter than ABAQUS. Moreover, experimental verification was carried out and the prediction derived from SAFEM is consistent with the measurement. Therefore, the SAFEM is feasible to reliably predict the dynamic response of asphalt pavement under moving loads, thus proving beneficial to road administration in assessing the pavement’s state.
机译:动态响应分析对于沥青路面的设计,维护和修复非常重要。为了评估运动荷载下沥青路面的动力响应,基于半解析有限元方法,开发了一种特定的计算程序SAFEM。该方法是三维的,只需在三维中合并傅立叶级数即可进行二维FE离散化。本文详细介绍了将动态分析应用于SAFEM的算法。在SAFEM和商业有限元软件ABAQUS中建立了移动荷载下的沥青路面模型,以验证SAFEM的准确性和效率。验证表明,SAFEM的计算精度足够高,并且计算时间比ABAQUS短得多。此外,进行了实验验证,从SAFEM得出的预测与测量结果一致。因此,SAFEM在可靠地预测运动荷载下沥青路面的动态响应方面是可行的,从而证明了在评估路面状态时对道路管理有利。

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