PCB Piezotronics Vibration Division ICP 086C01, Installation And Operating Manual

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Installation and Operating Manual
ICP
®
Impulse Force Test Hammer
Models: 086C01, 086C02, 086C03, 086C04, 086D05
086D20, 086D50, 086D80
Manual Number 19198
Contents:
1.0 Introduction
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Page 1
2.0 Description ................................
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. Page 5
3.0 Installation ...............................................
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... Page 5
4.0 Operation .........................................
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.. Page 6
4.1 Testing
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Page 6
5.0 Calibration
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... Page 7
6.0 Maintenance
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Page 8
7.0 Cautions
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.. Page 8
8.0 Customer Service
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Page 9
Appendix- Structure, Behavior and Calibration of Impulse-Force Test Hammers
1.0 INTRODUCTION
The ICP
®
Impulse Force Test Hammer adapts your FFT analyzer for structural behavior
testing. Impulse testing of the dynamic behavior of mechanical structures involves
striking the test object with the force-instrumented hammer, and measuring either the
resultant motion with an accelerometer or the acoustic signature with a microphone.
Structures generally respond as (1) rigid or elastic bodies, (2) finite elements, lumped
constant models, and (3) distributed parameter models conducting stress-strain (sound)
waves.
Testing the functional transfer and transactional characteristics of a mechanical structure
involves mounting the accelerometer at one location of interest, and striking the test
object with the hammer. Modal analysis and modeling involves fixing the
accelerometer(s) at one location, impacting the structure at one point, and then moving
the accelerometer(s) to other points of interest. Integration of the acceleration signal
yields velocity compliance, impedance, and mobility. The hammer impulse consists of a
nearly-constant force over a broad frequency range, and is therefore capable of exciting
all resonances in that range. The hammer, size, length, material, and velocity at impact