Structural dynamics and FRF testing
Turnaround and logistics
- Typical turnaround
- About two weeks from receipt of a complete specimen and an agreed scope
- Urgent work
- An urgent route is available — tell us the date you are working to at enquiry, not after booking
- Before you ship
- Confirm specimen size, mounting and packing first — see sample requirements
- Report language
- Reports issued in English; correspondence in Thai or English
When a structure or a product rings, the question is which frequency and how much damping. We measure frequency response functions by impact or shaker excitation and report natural frequencies, mode shapes where the geometry allows, and damping ratios.
What an FRF tells you that a spectrum cannot
A vibration spectrum tells you what a structure is doing right now, under whatever excitation happens to be present. A frequency response function tells you what the structure will do to any excitation — because it separates the structure's own behaviour from the forces acting on it. That distinction is the whole point.
It matters when a machine is replaced and the problem persists, when a resonance appears only at one operating speed, or when a panel is quiet in the workshop and audible in the vehicle. In each case the spectrum describes the symptom and the FRF locates the cause.
Where our work stops
We measure and we report. We do not design the fix, and we do not recommend a supplier for it. That is not a limitation we apologise for — it is the reason the measurement is worth having. A laboratory that both diagnoses the problem and sells the remedy has an interest in what the numbers say. Take our data to whichever engineer or consultant you choose.
Is this an accredited measurement?
No. Structural dynamics and FRF work sits outside certificate 24-LB0054. The method and the conditions are documented so results are comparable between iterations, which is what development work needs, but no accreditation is claimed for it.
Can you measure on our site rather than in the laboratory?
Tell us the structure and the question you need answered and we will say whether it is answerable in situ. Some questions genuinely require the controlled conditions of a laboratory; some can only be answered on the real structure.