ISO 7626-5

Experimental Modal Analysis Using Impact Excitation

This test method characterises the dynamic properties of structures through experimental modal analysis using impact hammer excitation. The method measures natural frequencies, damping ratios, and mode shapes by striking the structure and recording the resulting vibration response. It is widely used in aerospace, automotive, civil engineering, and mechanical equipment development to validate structural designs and identify potential vibration issues. Accreditation ensures proper instrumentation calibration, correct measurement methodology, and reliable data interpretation for safety-critical applications.

What it measures

  • Natural frequencies (modal frequencies)
  • Damping ratios (modal damping)
  • Mode shapes (displacement patterns)
  • Frequency response functions (FRF)
  • Coherence and data quality metrics
🇩🇪 DIN EN ISO 7626-1 🇬🇧 BS EN ISO 7626-1 🇫🇷 NF EN ISO 7626-1 🇮🇹 UNI EN ISO 7626-1 🇪🇸 UNE EN ISO 7626-1 🇳🇱 NEN EN ISO 7626-1 🇩🇪 DIN EN ISO 7626-2 🇬🇧 BS EN ISO 7626-2 🇫🇷 NF EN ISO 7626-2 🇮🇹 UNI EN ISO 7626-2 🇪🇸 UNE EN ISO 7626-2 🇳🇱 NEN EN ISO 7626-2
1,817 Accredited labs
19 Countries

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Kova Asbestos Consultants

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UKAS 7736 Chelmsford, GB
(HSG 248) – 2021 (PCM) based on HSG 248 SAS 02 based on HSG 248
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Kovia

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UKAS 9942 Royal William Yard, GB
Appendix 5 of HSG 227 (2004)) HSG 227 (2004) HSG 264 (2012) and Appendix 3 of
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Institut für Laboratoriums- und Transfusionsmedizin Herz- und Diabeteszentrum NRW

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DAkkS D-ML-13173-01-00 Bad Oeynhausen, DE
Thrombozytenfunktion Amiodaron/Desethylamiodaron Cotinin Cyclosporin A Everolimus + 3 more
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Kreiskrankenhaus Bergstraße GmbH - eine Einrichtung des Universitätsklinikums Heidelberg Zentrallaboratorium

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DAkkS D-ML-21357-01-00 Heppenheim, DE
Albumin Alkohol ALP Anti-Faktor Xa (Fragmin) AT3 + 3 more
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Krämer-Evers Bauphysik

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DAkkS D-PL-21175-01-01 Hasbergen, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3
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Kurz und Fischer GmbH. Beratende Ingenieure

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DAkkS D-PL-19181-01-00 Winnenden, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 13487 DIN 45635-46 + 2 more
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Kögel Werkstoff- und Materialprüfsysteme

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DAkkS D-K-15009-01-01 Leipzig, DE
Eindringkörper für 75° Sound system equipment — speech transmis Länge der Schnittlinien * Vergrößerungsnormale Abflachung bis 300 + 3 more
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Körber Technologies Instruments GmbH - Physikalisches Messlabor

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DAkkS D-K-15082-01-00 Hamburg, DE
Durchfluss von Gasen 17 mL/s transferstandards Strömungswiderstand 5 mL/min 15,0 mL/min Laminar Flow Elemente 17 mL/min + 3 more
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Kötter Consulting Engineers

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DAkkS D-PL-22893-01-00 Rheine, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 61400-11 ISO 9613-2
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L & W Gesellschaft für Fertigungsmeßtechnik und Qualitätssicherung

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DAkkS D-K-17059-02-01 Dresden, DE
Messschieber für Außen-, 0 mm Innen- und Tiefenmaße > 300 mm Tiefenmessschieber 0 mm Höhenmessschieber 0 mm + 3 more
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L3A LAB

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COFRAC 1-0978 Malakoff, FR
NF X 43-050 NF X 43-269 - Annexe K NF X43-050 (parties utiles de
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LAB (UK)

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UKAS 0671 Basildon, GB
(HSG 248) – 2021 (PCM) based on HSG 248 MAAM 05 based on HSG 248 (HSG 264, 2012)
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LAB-EXPERT

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COFRAC 1-6752 Ivry Sur Seine, FR
NF X43-050 (parties utiles de la NF X 43-050 NF ISO 22262-1 (parties utiles
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LABAQUA, S.A. (Unipersonal)

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ENAC LE285 Alacant, ES
UNE-EN ISO 27888 SM 2540 UNE-EN ISO 8467 UNE-EN ISO 7027-1 UNE-EN ISO 10523 + 3 more
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LABCO

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DAkkS D-PL-22035-01-00 Loxstedt-Stotel, DE
ASTM D 638 ASTM D 1004 DIN EN 50178: 1998 ISO 21527-2 DIN EN ISO 527-3 + 3 more
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LABEXIA

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COFRAC 1-1410 Quimper Cedex, FR
DIN EN ISO 14891 DIN EN ISO 6888-2 DIN ISO 16649-2 NF V04-287 DIN EN ISO 6888-3 + 3 more
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LABOCEA - Site de Brest

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COFRAC 1-7014 Plouzane, FR
DIN EN 13346 CEN / TS 14235 NF T 90-412 DIN EN ISO 7899-1 DIN EN 12880 + 3 more
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LABOCOR ANALÍTICA, S.L. (Unipersonal)

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ENAC LE1912 Colmenar Viejo, ES
AOAC 995.11 UNE EN ISO 6869 AOAC 985.35 UNE-EN 17298
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LABORATOIRE DEP ANALYSES RECHERCHES

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COFRAC 1-0871 Coulounieix-Chamiers, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 DIN EN ISO 10304-1 NF-T 90-101 NF T90-015-1 + 3 more
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LABORATOIRE DEPARTEMENTAL D'ANALYSES DE GIRONDE

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COFRAC 1-1466 Pessac Cedex, FR
NF V08-106 NF T 90-412 NF EN ISO 7887 – VDE 414-9-11 DIN EN ISO 7899-1 + 3 more
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LABORATOIRE DEPARTEMENTAL D'ANALYSES ET DE RECHERCHE (L.D.A.R.)

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COFRAC 1-0551 Laon Cedex, FR
DIN ISO 11466 NF X31-120 DIN EN ISO 11885 NF X31-147 DIN EN 16175-1 + 3 more
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LABORATOIRE DU COMMISSARIAT DES ARMEES (LABOCA)

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COFRAC 1-1046 Les Ponts De Ce, FR
NF V08-401 DIN EN ISO 6888-2 DIN ISO 16649-2 BS ISO 15214:1998 NF V08-409 + 3 more
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LABORATOIRE ECCI

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COFRAC 1-1105 Serres-Castet, FR
DIN EN 10002-1 ASTM E8/E 8M ASTM A 370 NF EN ISO 6892-1 (méthodes A1, A2 et DIN EN 2002-001 + 3 more
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LABORATOIRE ICARE

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COFRAC 1-1021 Saint Beauzire, FR
ISO 14698-1 DIN EN ISO 17141 DIN EN 12469 DIN EN ISO 11138-2 DIN EN ISO 11737-2 + 3 more
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LABORATOIRE KEYBIO - LA CIOTAT

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COFRAC 1-6990 La Ciotat, FR
DIN EN 13624 DIN EN 13727 DIN EN ISO 11930 DIN EN 17387 DIN EN ISO 22717 + 3 more
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Industries

Aerospace and aviation Automotive and rail vehicles Civil engineering and structures Mechanical equipment manufacturing Wind energy systems

Related Standards

  • ISO 7626-1 Vibration and shock — experimental modal analysis — Part 1: fundamentals and overview
  • ISO 7626-2 Vibration and shock — experimental modal analysis — Part 2: instrumentation for impact excitation
  • ISO 9614-1 Acoustics — determination of sound power levels of noise sources using sound intensity — Part 1: measurement at discrete points

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