DynaPave

DynaPave can calculate the dynamic response of pavement structures. The algorithm of DynaPave is based on spectral element method(SEM). The program is coded in C++ and OS independent.

SEM combines the exact solution of wave motion with the finite element formulation of multi-layered systems. A spectral element is capable of describing the wave propagation, reflection and refraction in a layer in a closed form. 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.

The transformation between time-space domain and frequency-wavenumber domain was achieved by using Kreyszig solution and FFT, instead of the hankel transform and fourier transform, so infinite integration can be avoided and the problems are more convenient for numerical solutions.

The process of falling weight deflectometer(FWD) test and portable falling weight deflectometer(PFWD) test have been simulated successfully in this project.

SEM computes system response in frequency-wavenumber domain. This approach allows for adjustment of frequency dependent properties. This is especially useful in the description of the AC layer, where properties exhibit strong frequency dependence. By substituting the rheological model into SEM formulation, the dynamic response of viscoelastic material could also be computed.

The algorithm can compute the dynamic response of layered media exactly, such as stress, strain, displacement et al. It can be applied in the process of pavement design and pavement detection.

Contact the author(greatchengsheng@gmail.com) for more details of this project.