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Seismic Vibrator - TU Delft
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A seismic vibrator, capable of applying low frequency forces repeatable to the ground, was developed and built.
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For seismic monitoring and exploration
of oil and gas reserves the ground is excited with a vibrator. Commercially
available systems use hydraulics to create the required forces. For the
excitation at low frequencies (2-5 Hz), the non-linear behavior of the
hydraulics is the limiting factor in the performance. Therefore, a new
vibrator, based on linear motor technology was developed.
A Euspen paper can be found here. A
data sheet of the shaker can be found here.
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Challenges |
- Obtaining a signal bandwidth of 2-200Hz without limitations from internal resonances within the 1000 kg structure
- Creating a stiff, frictionless and repeatable guiding for 24/7 usage
- Designing a low stiffness gravity compensator
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Key Competences |
- Prediction of frequency response functions / mode shape analyses
- Construction Principles for Precision Engineering
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Results |
- In the field tested prototype
- Working prototype for research of non-linear ground behavior
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Cooperation |
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