The MATLAB-based Dispersion Calculator (DC) is an interactive software for calculating dispersion curves and mode shapes of guided waves in isotropic plates, rods, and pipes as well as in multilayered anisotropic laminates. DC is continuously improved and validated using DISPERSE. DC was first released in 2018. It is used worldwide today.
Features:
Graphical user interface for easy handling
Guided wave dispersion diagrams for isotropic plates, rods, and pipes (axial and circumferential modes) as well as multilayered anisotropic laminates: phase velocity, energy velocity, propagation time, coincidence angle, wavelength, wavenumber, and attenuation vs frequency
Different materials can be assembled in a laminate: isotropic, cubic, transversely isotropic, and orthotropic materials
Immersion in fluids (damping through energy leakage): plates and rods can be surrounded by fluids and pipes can be filled with and surrounded by fluids
Viscoelasticity (material damping)
Polar dispersion diagrams: phase velocity, energy velocity, propagation time, coincidence angle, wavelength, and wavenumber vs propagation direction
Signal simulator: time and frequency response of single or multiple guided waves after propagating a certain distance in a waveguide
Through-thickness mode shapes: displacement, stress, strain, energy density, and power flow density
2-D animation of mode shapes
Elastic wave propagation in bulk material: 2-D and 3-D phase velocity, group velocity, slowness, polarization, and energy deflection
Scattering of bulk waves at the interface between fluids and solids: 2-D and 3-D representations; reflected and transmitted energy scattering coefficients vs angle of incidence
Homogenized stiffness tensor of multilayered anisotropic laminates
Material editor: input of real and complex engineering constants and stiffness tensor components
Export of graphics
Export of dispersion curve, mode shape, and simulated signal data as Excel, Txt, and Mat files
Special Features:
DC can calculate laminates with several hundred layers
DC can distinguish the different mode families such as symmetric, antisymmetric, and asymmetric Lamb, horizontal shear and Scholte waves
Many years of continuous revision enable fast and robust tracing of dispersion curves
Download and use the DC:
Go to GitHub (see link below) and select the latest release on the right-hand side.
Either download “DC_vXY_Installer.exe” to install DC as stand-alone (no MATLAB required)
Or download “Source code” (MATLAB and Curve Fitting Toolbox required)
