Dynamic Interpretation of Falling Weight Deflectometer Test Results: Spectral Element Method
Dynamic Interpretation of Falling Weight Deflectometer Test Results: Spectral Element Method
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落锤偏转仪测试结果的动态解释：谱元法
DOI：
10.3141/1716-06
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
J. Blaauwendraad
中科院分区：
文献类型：
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作者：
Rafid AI;A. Scarpas;C. Kasbergen;J. Blaauwendraad
使用频谱分析作为分析落锤式弯沉仪（FWD）荷载脉冲对路面的动态影响的一种手段。利用谱元技术。只提出了路面动力学的正向分析，并强调了该方法用于求解反问题的适用性。利用新近开发的谱元程序LAMDA（层状介质动力分析）模拟了FWD荷载脉冲与路面结构的相互作用。在LAMDA中，波在层中的传播、反射和折射的公式化是以封闭形式完成的。单元的组装（在多层系统中）以类似于有限元法的方式进行。因此，路面结构的网格尺寸与所涉及的层数一样大。这大大降低了计算要求，因此，使利用LAMDA的迭代算法进行反算的目的。
The use of spectral analysis as a means of analyzing the dynamic impact of falling weight deflectometer (FWD) load pulses on pavements is covered. The spectral element technique is utilized. Only forward analyses of pavement dynamics are presented, with the emphasis on the suitability of the method for solving inverse problems. LAMDA (layered media dynamic analysis), a newly developed spectral element program, is utilized for the simulation of the interaction between the FWD load pulse and the pavement structure. In LAMDA, the formulation of the wave propagation, reflection, and refraction in a layer is done in a closed form. The assembling of the elements (in the multilayer system) is carried out in a manner similar to that in the finite element method. Consequently, the size of the mesh of a pavement structure is as large as the number of the layers involved. This reduces the computational requirements substantially and hence enables utilization of LAMDA in iterative algorithms for backcalculation purposes.