Abstract
This paper presents pneumatics as a means of exciting a structure in
Experimental Modal Analysis. The physical phenomenon underlying it is
jet impingement on the structure's surface. The jet is generated from a
nozzle connected to a fast switching pneumatic on-off valve. A
technique using such valves driven by binary sequence signals is
described. The fastest valves available to-date allow for excitation
bandwidths of up to about 300 Hz. The technique's major advantages are
its ease of installation and use and its cheapness. Moreover, it is a
noncontact method of excitation and, therefore, no mass, inertia,
damping or stiffness is added to the structure as is the case with
fixed methods, e.g. shakers. Its applicability is restricted to
lightweight structures because of the limits in bandwidth and force.
The physical background of the proposed technique is first discussed.
Next, an experimental study of the method is reported on. Finally, the
method is tested on an axle to find its bending modes.
Experimental Modal Analysis. The physical phenomenon underlying it is
jet impingement on the structure's surface. The jet is generated from a
nozzle connected to a fast switching pneumatic on-off valve. A
technique using such valves driven by binary sequence signals is
described. The fastest valves available to-date allow for excitation
bandwidths of up to about 300 Hz. The technique's major advantages are
its ease of installation and use and its cheapness. Moreover, it is a
noncontact method of excitation and, therefore, no mass, inertia,
damping or stiffness is added to the structure as is the case with
fixed methods, e.g. shakers. Its applicability is restricted to
lightweight structures because of the limits in bandwidth and force.
The physical background of the proposed technique is first discussed.
Next, an experimental study of the method is reported on. Finally, the
method is tested on an axle to find its bending modes.
| Original language | English |
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| Title of host publication | ISMA25, International Conference on Noise and Vibration Engineering, Leuven, Belgium, pp. 497-504 |
| Publication status | Published - 2000 |
| Event | Unknown - Duration: 1 Jan 2000 → … |
Conference
| Conference | Unknown |
|---|---|
| Period | 1/01/00 → … |