15. R modeling

15.1. Characteristics of modeling

Formulation pressure elements PLAN “ACOUSTIQUE”

Divide =	15	meshes TRIA6selon the \(x\) axis
	2	meshes TRIA6selon the \(y\) axis

Boundary conditions:
	VITE_FACE:	(group_MA: Input	Vnor: 0.014)
	IMPE_FACE:	(group_MA: Output	Impe: 445.9)

Node name

\(A=\mathrm{No1}\)

\(B=\mathrm{No5}\)

\(C=\mathrm{No2}\)

\(D=\mathrm{No6}\)

15.2. Characteristics of the mesh

Number of knots:	155
Number of meshes and types:	60 TRIA64 SEG3

15.3. Tested values

Location	Sizes	Reference	Tolerance
\(A\)	\(p(\mathrm{réel})\)	—6.2426	0.2%
	\(p(\mathrm{imag})\)	0.0000	0.2%
	Sound Intensity (real)	0.0437	3.5%
	Sound Intensity (image)	0	5.0E-3
\(B\)	\(p(\mathrm{réel})\)	—6.2426	0.1%
	\(p(\mathrm{imag})\)	0.0000	0.1%
	Sound Intensity (real)	0.0437	3.5%
	Sound Intensity (image)	0	4.5E-3
\(C\)	\(p(\mathrm{réel})\)	6.0237	0.3%
	\(p(\mathrm{imag})\)	1.6387	0.3%
	Sound Intensity (real)	0.04037	2.0%
	Sound Intensity (image)	0	2.5E-4
\(D\)	\(p(\mathrm{réel})\)	6.0237	0.1%
	\(p(\mathrm{imag})\)	1.6387	0.1%
	Sound Intensity (real)	0.0437	2.5%
	Sound Intensity (image)	0	3.5E-4