Bo Qiang

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Questions related from Bo Qiang

Can someone advise me on a stability issue in 3D Chebyshev pseudospectral simulation?

Hi, I am trying to use Chebyshev pseudospectral method to simulate 3D wave propagation problems. The solver works but is very unstable. I applied mapping functions to make the boundary mesh grid...

24 February 2015 890 4 View

How to separate shear and compressional wave in forward simulation?

Hi, I am doing forward wave simulation in 3D space. One of the problems is that since the Poisson's ratio is close to 0.5, the compression wave speed is much faster than that of the shear wave....

12 February 2015 649 2 View

How can I use leapfrog method for velocity-stress formula of wave equation?

It seems like leapfrog is defined for the 2nd order PDE wave equation. For a 1st order formulation like the velocity-stress formulation, is there a way to use the leapfrog integration? The reason...

08 February 2015 5,027 3 View

What is the best integration scheme in time in solving wave equation in stress-velocity formulation?

I am trying to solve 3D wave equation expressed by stress-velocity formulation with Chebyshev spectral method. In the time domain, I am currently using RK4 explicit scheme but it is really slow....

01 August 2014 5,834 2 View

How can I implement PML for Chebyshev spectral method?

I am learning Lloyd N. Trefethen's book "Spectral Methods in Matlab". I am very impressed by the precision of chebyshev spectral method can achieve. I am working on simulating wave propagation...

07 May 2014 7,099 4 View