3D Global Weak-Form Mesh-Free Method for Acoustic Attenuation Analysis of Expansion Chambers

Table 1

Weight coefficient and integration point coordinates for the Hammer integration.

Number of integration points	Weight coefficient	Integration point coordinate	Order of precision
1	A1	, , ,	1
4	B2	a = 0.58541020	2
		b = 0.13819660
5	A1 = −	a = 1/2 b = 1/6	3
	B4 =