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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ETAS

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DAkkS D-K-19158-01-00 Stuttgart, DE
- Gleichspannung Quellen und Messgeräte > 1 mV bis > 10 mV bis > 100 mV bis > 10 V bis + 3 more
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EXcorLab

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DAkkS D-PL-19275-02-01 Obernburg, DE
DIN EN ISO 1135-4 EN ISO 1135-5 DIN EN ISO 10993-1 DIN EN ISO 8637-1 DIN EN ISO 7199 + 2 more
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DAkkS D-K-15203-01-01 Braunschweig, DE
Aktivität 20 Bq > 20 Bq Spezifische Aktivität radioaktiver Lösungen 20 Bq·g + 3 more
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DAkkS D-K-15196-01-01 Nordenham, DE
Gleichspannung 30 mV / Messgeräte > 0,33 V > 3,3 V > 33 V + 3 more
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DAkkS D-K-20306-01-00 Weinstadt, DE
Taupunkttemperatur für Widerstands- ˃ 500 °C - Direktanzeigende Thermometer Thermoelemente ˃ 500 °C Widerstands- -50 °C + 3 more
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DAkkS D-PL-12155-01-01 Straubing, DE
IEC 61000-4-2: 2008 IEC 61000-4-3: 2006 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 IEC 61000-4-6: 2013 + 3 more
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DAkkS D-K-15020-04-01 Norderstedt, DE
/ Messgeräte 0,001 V > 0,22 V > 2,2 V > 22 V + 3 more
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DAkkS D-K-15180-01-01 Wiesloch, DE
Elektrische Messgrößen Gleichstrom- und Niederfrequenzmessgröße Railway brake — magnetic track brakes (U − Gleichspannung − Gleichstromstärke + 3 more
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Elster

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DAkkS D-K-19495-01-01 Mainz-Kastel, DE
Durchfluss von Gasen 0,5 m³/h Volumendurchfluss > 4 m³/h Railway overhead lines — pantograph head > 10 m³/h + 3 more
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DAkkS D-PL-18838-02-01 Riedering, DE
DIN EN ISO 14607 DIN EN 13687-2 DIN EN ISO 15912 ASTM E290-22 DIN EN ISO 19023 + 3 more
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DAkkS D-K-19095-01-00 Weil am Rhein, DE
Railway brake — magnetic track brakes (U Railway brakes — conditions for homologa − Durchfluss von Flüssigkeiten Railway brakes — estimation of braking f − Masse strömender Flüssigkeiten + 3 more
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DAkkS D-PL-15172-01-00 Maulburg, DE
IEC 61000-4-2: 2008 IEC 61000-4-3: 2006 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 IEC 61000-4-6: 2013 + 3 more
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DAkkS D-PL-11054-01-00 Dresden, DE
CDC73 (NM_000384: c.1-c.82) ID152 EN ISO 11925-2 DIN EN 350 + 3 more
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DAkkS D-K-21247-01-01 Hemer, DE
Innen- und Tiefenmaße Konventioneller 0,11 G > 2 G > 5 g + 3 more
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Esders

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DAkkS D-K-23123-01-01 Haselünne, DE
Absolutdruck Pabs Druck 0,35 bar > 19 bar Überdruck p 0,35 bar
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Esenwein

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DAkkS D-K-15168-01-00 Hochdorf, DE
/ Messgeräte > 220 mV Quellen > 0,2 V 120 V 200 V + 3 more
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DAkkS D-ML-17481-01-01 Gelsenkirchen, DE
Thrombozytenfunktion Agomelatin Amisulprid (Psychopharmaka) Amitriptylin (TZA) Aripiprazol (Neuroleptika) + 3 more
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DAkkS D-ML-17480-01-01 Gelsenkirchen, DE
Thrombozytenfunktion Agomelatin Amisulprid (Psychopharmaka) Amitriptylin (TZA) Aripiprazol (Neuroleptika) + 3 more
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DAkkS D-PL-12092-01-02 Reichenwalde, DE
DIN EN IEC 61000-6 DIN EN IEC 61000-3 DIN EN 61000-3 EN IEC 61000-4 ISO 13766-1: 2018 + 3 more
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DAkkS D-PL-19438-01-00 Schwerte, DE
DIN EN 13141-4 DIN EN 13141-6 DIN EN 13141-7 DIN EN 13141-8 DIN EN 13141-11 + 3 more
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DAkkS D-ML-20007-01-00 Duisburg, DE
Glykohämoglobin A1C (HbA1c) Basophile Granulozyten Eosinophile Granulozyten Erythrozytenverteilungsbreite (RDW) + 3 more
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DAkkS D-ML-18340-01-00 Oberhausen, DE
Blutzellen Basophile Granulozyten Basophile Granulozyten, Eosinophile Gran Eosinophile Granulozyten, Erythrozyten, Basophile Leukozyten, absolut + 3 more
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DAkkS D-PL-21199-01-01 Kitzingen, DE
DIN EN ISO 1798 DIN EN ISO 1856 Myopathie, Nemaline (TyP1, 3-10: DIN EN ISO 14125 DIN EN ISO 179-1 + 3 more
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DAkkS D-PL-20119-02-02 Heimertingen, DE
EN 1317-1 EN 1317-2 EN 1317-3 DIN CEN/TS 1317-7 DIN CEN/TS 1317-9 + 2 more
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DAkkS D-PL-22545-01-01 Essen, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3
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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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