ODS & Modal Testing Using a Transmissibility Chain

• 作者: Brian Schwarz Mark Richardson Patrick McHargue
• 来源期刊: 声音与振动(英文)
• 学科: 工学
• 关键词: Fourier SPECTRUM (DFT) Auto power SPECTRUM (APS) Crosspower SPECTRUM (XPS) Frequency Response Function (FRF) OperatingDeflection SHAPE (ODS) Experimental MODE SHAPE (EMA Mode) OperationalMode SHAPE (OMA Mode) Modal Assurance Criterion (MAC) ShapeDifference Indicator (SDI)
• 年，卷（期）: syyzdyw,（2）
• 页码范围: 2-7
• 页数: 6页
• 分类号: TS1

摘要

In this paper, we show how Operating Deflection Shapes (ODS’s) andmode shapes can be obtained experimentally from measurements thatare made using only two sensors and two short wires to connect them to amulti-channel acquisition system. This new test procedure is depicted inFigure 1. Not only is the equipment required to do a test much more costeffective, but this method can be used to test any sized test article, especiallylarge ones.