Energy Boundary Element Method for Computing High Frequency ...

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EBEM and Airborne Noise Analysis External SPL is required for an airborne noise analysis Measurements are used for defining external acoustic field EBEM computes the external acoustic field – loading for airborne simulations
Technical Background Governing Integral Equations: e~ Y 2 ⎛ ρ k ρ ∫ ( ) ⎟ ⎞ = σ P ⎜ + dS S 2 4 2 2 ⎝ 64π r 32π r ⎠ 2 ~ k ρc I Y = ∫ σ S ( P) ErdS 2 2 32π r Numerical Implementation: n e ~ ⎡ ⎤ Y = ∑ σ j ⎢⎣ ∫ G( , Y ) dS S j ⎥⎦ j= 1 ξ IY = ∑ σ j∫ ~ n j = 1 ⎡ ⎢⎣ S j H( ξ, Y) dS ⎤ ⎥⎦ ρ G ( ξ Y) + 2 4 64π r , 2 k 2 ( ξ, Y) 32π r ( ξ, Y) 2 ρ = H ( ξ Y ) 2 k ρc 2 32π r , = 2 E r ( ξ, Y) [ K ]{} σ = { P} JSV 278 (2004) pp. 413 - 436
Page 1 and 2: Energy Boundary Element Method for
Page 3: Development of EBEM Originally EBEM
Page 7 and 8: Compared to SEA… SEA uses artific
Page 9 and 10: Windshield Roof Automotive Validati
Page 11 and 12: Windshield Roof Glass Door Source 1
Page 13 and 14: Validation ~300 ft Insertion loss c
Page 15 and 16: EBEM - EFEM Case Study: Internal no
Page 17 and 18: Magnitude of difference between tes
Page 19 and 20: EFEM - models the structure and the
Page 21 and 22: EBEM toolbox Integration with VL
Page 23: Summary •EBEM is a high frequency

Energy Boundary Element Method for Computing High Frequency ...

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