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This Tech Note describes a laboratory experiment developed at Texas Christian University (TCU) intended to enable students to visually analyze the transverse response of an object under sine and random vibrations. In the experiment, engineer Rene Chiquillo, Jr. uses PCB microphone 378A13, PCB accelerometer 333B42, a Phillips scope, an LDS electrodynamic shaker, and a steel structure with 14 horizontally clamped rods of different lengths to demonstrate how the dimensions of a geometric body define its resonant frequency and respective mode shape.
PCB® manufactures sensors used by design engineers and predictive maintenance professionals to test and measure vibration, pressure, force, acoustics, load, and shock in research and development as well as industrial applications.
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