Vibration Consultancy
JSK Vibrations is a vibration consultancy operating in many different industries. Our vibration specialists can assist with:
- Vibrations in buildings.
- Vibration in machines.
- Vibrations of bridges/towers/chimneys
Vibration services – 3 main areas
Vibration measurements
- Measurements of natural frequecies, damping and vibration level in buildings
- Measurement on and around rotating machinery.
Continous measurements over a longer period of time is also possibel e.g. for:
– Human induced vibrations
– Vortex induced vibrations
– Machine induced vibrations
Vibration Consultancy Analysis
- Finite element analysis to determine vibration comfort
- Optimization of structural elements
- Calculation & measurements are compared with the relevant standard.
Tuned Mass Dampers
- Design of tuned mass dampers (TMD)
- Construction
- Installation
- Verification
Vibration Consultancy Cases
Case: Vibration Measurements in Office
Vibration Services:
– Vibration measurements on floors.
– Suggestions for improvement of vibration comfort.
– Memo with documented results.
Results:
– First natural frequency: 9.0 Hz.
– Accelerations: 0.9 % of gravity.
– Criteria for accelerations not fulfilled.
Case: Compressor Vibrations in Factory
Vibration Services:
– Vibration measurements on compressors, deck.
– Suggestions for improvement of vibration comfort.
– Memo with documented results.
Results:
– Compresor frequencies: 60-80 Hz.
– Accelerations: up to 1 % of gravity.
– Criteria for accelerations not fulfilled.
Case: Complaint on vibrations in apartment
Vibration Services:
– Vibration measurements
– Finite element model (Calibrated to measured frequencies)
– Suggestions for improvement
– Memo
Results:
– First natural frequency: 6.7 Hz
– Accelerations: 0.5-1.0 % of gravity
– Criteria for acceleration not fulfilled.
Vibration Consultancy Experience
- Design of more than 50 tuned mass dampers for floors, stair cases, grand stands, pedestrian bridges and fitness centers.
- Assessment and calculations of vibrational comfort for 100+ structures.
Publications
- J.S. Knudsen, N. Grathwol and S.O. Hansen:“Vibrational Response of Structures Exposed to Human induced loads”
Ready to help you:
Vibration Specialist:
Jonas Syders Knudsen
M.Sc Engineering
jsk@jsk-vibrations.com
+45 61 39 61 62
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