Question

Can someone give specific methods to convert frequency dependant viscoelastic properties into time dependant ones?

These properties are available in books by DIG Jones, but I need to have the properties in a time-dependant manner. Any code such as Matlab code also will do.

Topics

0 / 0  ·  8 Answers  ·  246 Views

All Answers (8)

  • Y. Azizi · Institute for Advanced Studies in Basic Sciences
    if you mean you have a fourier transform of a function, you can use inverse fourier transform to find time-dependent function. In MATLAB this can be done with FFT command. search FFT in MATLAP product help and find out have it work.
  • venkata rao Ganapathiraju · Vasavi College of Engineering
    Thanks
  • Y. Azizi · Institute for Advanced Studies in Basic Sciences
    just note that ordinary fft method in MATLAB works for uniform data distribution. If your data is non-uniform distribution, search for nufft method.
  • Yar Yot · Loei Rajabhat University
    Spss
  • Eduardo Ianaguivara · Universidade de Mogi das Cruzes
    can also use the octave has the advantage that it is free but linux
  • venkata rao Ganapathiraju · Vasavi College of Engineering
    Thanks to all those who have responded. I will take these leads further.

    GVRao
  • Li Li · Huazhong University of Science and Technology
    You can model the viscoelastic properties in the frequency domain, and using fast fourier transform (FFT) and inverse FFT (IFFT) to address this problem.
    The freuquency viscoelastic models can be refered to Biot model, ADF model, GHM model, fractional derivative model and so on. Many FFT programmings can be suitable for the problem, e.g., using MATLAB.
    For further reading, see, e.g., in Li, et al. "Design sensitivity analysis of dynamic response of nonviscously damped systems." Mechanical Systems and Signal Processing 41.1-2 (2013): 613-638.

Question Followers (6)