Excitation Systems
For inducing vibration and shocks to the subsoil we use different machinery and equipment:
Butterfly®
Butterfly® is a servohydraulic shaker for artificial excitation and is developed in-house. The shaker was made for worldwide mobile application.
Typical fields of application are:
- Simulation of train pass-bys on tracks e.g. to determine the insertion loss
(please read our brochure Determination of Insertion Loss) - Dynamic excitation of bridges
- Load tests of tower buildings
- Vibration excitation of massive structures like hydro dams/gravity dams
- Simulation of ground-borne vibrations on long distance
Vertical and horizontal vibrations can both be simulated by simple setup modification.
Specially developed for shaking structures with low frequencies, Butterfly® shows high performance in an extraordinary frequency range of 0,01-110 Hz.
The shaker moves its mass elements (weight: 200-800 kg) with a maximum force amplitude up to 20 kN.
Every load sweep is driven by a high sophisticated sensor system.
Dynpact®
Dynpact® gives a puls excitation, is flexible in application and has delivered an optimal performance in practice.
Parallel measurement of force and resulting vibrations on the surface or in a bore hole (up to a depth of 25 m)
allow a high variety of simulation tests for dynamic loads.
The adjustable weight of hammer (10-75 kg) falling from a maximum height of 1,0 m gives an impact energy of 100-750 J.
Typical fields of application are:
- Excitation tests for structures (admittance measurement)
- Determination of dynamic stiffness of a foundation or a ceiling
- Vibration propagation tests on the ground
- Vibration prognosis according to the american guideline FTA-VA-90-1003-06
Impact Hammer
The lightweight Impact Hammer (2,5 kg) is ubiquitous applied for detecting natural frequencies and frequency dependent stiffness of a structure. It is field-tested and frequently used on building sites as well as for dynamic tests in cleanrooms.
Elektrodynamic Shaker
The small but robust electrodynamic shaker produces an exact controlled harmonic excitation on a surface. It is also excellent suitable for testing measurement equipment and for precise calibration.
All at a glance:
