Copyright LMS International 1 Laurent Britte – Test Division y k Transfer Path Analysis – Web seminar 2/2 Operational Transfer Path Analysis & LMS O PAX ? The seminar will start at 10:00, Central European Standard Time (GMT +01:00, Paris) ? Event number: 668 224 498 ? Voice over IP for the audio part or list of phone number in registration approval e-mail 2 Operational Transfer Path Analysis: Introduction 1 TPA – Web seminar 1/2: Summary 3 OPA / OTPA 4 LMS OPAX Agenda 5 Solution in LMS Copyright LMS International 2 2 Operational Transfer Path Analysis: Introduction 1 TPA – Web seminar 1/2: Summary 3 OPA / OTPA 4 LMS OPAX Agenda 5 Solution in LMS Transfer Path Analysis Source-transfer-receiver approach X = Source (F i,Q j) Transfer (NTF) Receiver (y k) y k structural ∑∑= = + = p 1 j j jk n 1 i i ik k Q * NTF F * NTF y airborne || || Copyright LMS International 3 Transfer Path Analysis Measurements – Transfer functions Structural loads ∑∑+ = k k k i i i Q H f H p Acoustic loads Removal of source Reciprocity FF FF XX XX H H = Input at Input at ‘‘jj’’, output at , output at ‘‘kk’’ is is equivalent to input at equivalent to input at ‘‘kk’’, output at , output at ‘‘jj’’ for structural, acoustic, or vibro for structural, acoustic, or vibro-- acoustic FRF acoustic FRF Transfer Path Analysis Measurements - Loads ? Direct Measured Direct measured forces and acoustic strength ? Mount Stiffness ? Indirect Indicator ? Matrix Inversion ????????????????????????????= x x x F x F x F x F && && && && && && ????????????????????????= ?????????? x x F x F x F x F x F F && && && && && && ... ... ... ... ... ... ... ????????????????????????= ?????????? p p Q p Q p Q p Q p Q Q ... ... ... ... ... ... ... () ()() () [ ] ωωωω X X K F ?= Single Source – Multiple Indicator Multiple Source – Multiple Indicator Structural Acoustic Copyright LMS International 4 2 Operational Transfer Path Analysis: Introduction 1 TPA – W
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