2 "challenge_id": "cymbal-bow-v1",
3 "title": "Bowed bronze disk (paraboloidal shell) struck with a drum stick, geometrically nonlinear: radiated pressure",
4 "version": 1,
5 "output": {
6 "type": "wav",
7 "sample_rate_hz": 48000,
8 "num_samples": 288000,
9 "channels": 1,
10 "sample_format": "float32",
11 "signal": "acoustic pressure at the listener point from the Rayleigh-type integral of the normal acceleration over the top face",
12 "signal_unit": "Pa",
f2032f3cymbal-bow-v1: signal scale 80 Pa (first solution peaks at 36.7 Pa)Jeremy Magland 13 "signal_scale": 80.0
15 "playback": {
16 "gain_db": 30,
17 "note": "Suggested playback gain for listening; presentation only, not part of the deliverable."
18 },
19 "geometry": {
20 "type": "shell-of-revolution",
21 "mid_surface": "z = Z(r) = bow_height * (1 - r^2 / disk_radius^2), 0 <= r <= disk_radius",
22 "thickness": "uniform, measured along the normal to the mid-surface",
23 "hole": null
24 },
25 "parameters": {
26 "disk_radius": 0.2032,
27 "bow_height": 0.025,
28 "h": 0.001,
29 "E": 110000000000.0,
30 "nu": 0.34,
31 "rho": 8800.0,
32 "sigma0": 1.1,
33 "eta": 1.2e-08,
34 "strike_x": 0.17272,
35 "strike_y": 0.0,
36 "strike_radius": 0.005,
37 "strike_duration": 0.001,
38 "strike_peak_force": 1000.0,
39 "rho_air": 1.204,
40 "c_air": 343.0,
41 "listener_x": 0.06,
42 "listener_y": 0.08,
43 "listener_z": 0.5,
44 "strike_normalization_m2": 2.385927e-05
45 },
46 "metrics": {
47 "primary": "waveform_l2",
48 "waveform_l2": {},
49 "spectrogram_l2": {
50 "window": "hann_periodic",
51 "n_fft": 2048,
52 "hop": 512
53 }
54 },
55 "fields": {
56 "format": "hdf5",
57 "quantity": "normal displacement of the mid-surface, u . n, at the mid-surface point above each grid point; NaN outside the disk",
58 "units": "m",
59 "axes": [
60 "t",
61 "y",
62 "x"
63 ],
64 "shape": [
65 3001,
66 61,
67 61
68 ],
69 "frame_rate_hz": 1000,
70 "dtype": "float32"
71 },
72 "reference_solution": null,
73 "model": "saint-venant-kirchhoff"
74}