Classical Modal Analysis

Classical modal analysis is used for modal parameter identification of structures under controlled boundary and environmental conditions using hammer or shaker excitation.

In Classical Modal Analysis, a model of a structure’s dynamic properties consisting of the modal parameters (natural frequencies, damping ratios and mode shapes) is obtained by exciting the structure with measurable forces and determining the response/excitation ratio.

Classical Modal Analysis ranges from simple mobility tests with a roving impact hammer and a fixed accelerometer to multi-shaker testing of large structures using hundreds of accelerometers. It is used in a vast range of tests including design verification and optimization, certification testing, troubleshooting and benchmarking.

System suggestion

Our classical modal analysis solutions guide you through the complete set-up, measurement and analysis in simple and intuitive steps, and provide you with accurate and reliable results even in the most demanding situations, with a targeted set of best-in-class modal parameter estimators and validation tools.

Our solutions cover the entire measurement and analysis chain including accelerometers and force transducers, impact hammers, modal exciter systems, LAN-XI data acquisition hardware and BK Connect® software for pre-test analysis, measurement, analysis and Finite Element model correlation. Our solutions are also expandable so they can grow with your requirements. 

Video: Brüel & Kjær Stepped Sine

Recorded webinar: Modal Analysis using Hammer or Shaker Excitation