UM-LISA: guided wave solver for solid structures

Hui Zhang

One field of research in Structural Health Monitoring (SHM) is relevant to guided wave modeling and simulation. An in-house code has been developed at the University of Michigan, with abundant features for wave simulation such as non-reflective boundary (NRB) techniques, piezoelectric coupled, contact dynamics, multiple GPU parallelization, etc. The code is running on a multiple-GPU platform and is demonstrated to be much more efficient than commericial Finite Element software.

The algorihtm we adopted is Local Interacation Simulation Approach (LISA), a finite difference solver proposed by P. P. Delsanto around 1997. The solver incoporated a sharp interface model (SIM) to deal with discontinuity at interfaces, and ensure both the continuity of displacements and stresses.

All features that are currently available in UM-LISA is shown below

here.

For more information about the algorithm and features, please check the following references.

References

  1. Raghavan, A. and Cesnik, C. E. S., “Review of guided-wave structural health monitoring,” Shock Vib. Dig. 39(2), 91–114 (2007).

  2. Delsanto, P. P., Schechter, R. S. and Mignogna, R. B., “Connection machine simulation of ultrasonic wave propagation in materials III: the three-dimensional case,” Wave Motion 26(1), 329–339 (1997).

  3. Nadella, K. S. and Cesnik, C. E. S., “Numerical simulation of wave propagation in composite plates,” Proc. SPIE, 83480L (2012).

  4. Nadella, K. S. and Cesnik, C. E. S., “Piezoelectric coupled LISA for guided wave generation and propagation,” Proc. SPIE, 86951R (2013).

  5. Zhang, H. and Cesnik, C. E. S., “A hybrid non-reflective boundary technique for efficient simulation of guided waves using local interaction simulation approach,” Proc. SPIE, 98050U (2016).