1{
2 "challenge_id": "plate-strike-nl-v1",
3 "title": "Hard-struck free aluminum plate, geometrically nonlinear: radiated pressure",
4 "version": 1,
5 "output": {
6 "type": "wav",
7 "sample_rate_hz": 48000,
8 "num_samples": 144000,
9 "channels": 1,
10 "sample_format": "float32",
11 "signal": "acoustic pressure at the listener point from the Rayleigh integral over the top face",
12 "signal_unit": "Pa",
13 "signal_scale": 10.0
14 },
15 "playback": {
16 "gain_db": 36,
17 "note": "Suggested playback gain for listening; presentation only, not part of the deliverable."
18 },
19 "parameters": {
20 "Lx": 0.3048,
21 "Ly": 0.3048,
22 "h": 0.00104,
23 "E": 68900000000.0,
24 "nu": 0.33,
25 "rho": 2700.0,
26 "sigma0": 2.3,
27 "eta": 5e-08,
28 "strike_x": 0.09144,
29 "strike_y": 0.10668,
30 "strike_radius": 0.01,
31 "strike_duration": 0.005,
32 "strike_peak_force": 40.0,
33 "rho_air": 1.204,
34 "c_air": 343.0,
35 "listener_x": 0.2524,
36 "listener_y": 0.1524,
37 "listener_height": 0.5
38 },
39 "metrics": {
40 "primary": "waveform_l2",
41 "waveform_l2": {},
42 "spectrogram_l2": {
43 "window": "hann_periodic",
44 "n_fft": 2048,
45 "hop": 512
46 }
47 },
48 "fields": {
49 "format": "hdf5",
50 "quantity": "normal displacement of the mid-plane, u_z(x, y, 0, t)",
51 "units": "m",
52 "axes": [
53 "t",
54 "y",
55 "x"
56 ],
57 "shape": [
58 3001,
59 61,
60 61
61 ],
62 "frame_rate_hz": 1000,
63 "dtype": "float32"
64 },
65 "reference_solution": null,
66 "model": "saint-venant-kirchhoff"
67}