Hi @Shubhrashayak, if you’ve already run a transient structural simulation and have the response of your cantilever beam (resT), you can use that as a boundary condition in your acoustic model — the one where you’ve subtracted the beam from a sphere.
You can do the following:
- Extract motion from the beamFrom your structural simulation, extract the normal velocity or displacement at the outer surface of the beam. This will be used to drive the acoustic model at the inner boundary.
- Apply it to the acoustic modelUse this extracted response as a time-dependent Neumann boundary condition (e.g., specifying NormalVelocity) in your acoustic PDE model.
Suppose you've solved the structural model as follows:
resT = solve(structuralModel, tlist);
Then, in your acoustic model setup:
acousticModel = createpde("acoustic", "transient");
% (Assume you've set up the geometry and mesh here)
% Define the face ID of the inner boundary (beam surface)
innerFaceID = 6; % just as an example
% Extract normal velocity from structural result
normalVel = resT.Velocity.uz; % assuming dominant motion is in z-direction
% Define a function to apply velocity over time
fvFunc = @(location, state) ...
interp1(tlist, normalVel(:, desiredNodeIdx), state.time, 'linear', 0);
% Apply it as a Neumann boundary condition on the acoustic domain
applyBoundaryCondition(acousticModel, ...
"neumann", ...
"Face", innerFaceID, ...
"g", fvFunc);
Make sure that desiredNodeIdx refers to a valid boundary node on the structural mesh that corresponds to the acoustic interface.
Using Phased Array Toolbox
Once you solve the acoustic model and obtain pressure data over time, you can use the Phased Array System Toolbox to analyze how the waves propagate across space. This is useful for simulating microphones, beamforming, and estimating direction of arrival.
For example:
pressures = interpolateSolution(acousticResult, probeLocations, timeIndices);
You can then pass the pressures to phased array components like phased.ULA or phased.DelayAndSumBeamformer.
Hope this helps!
