Structural integrity
Virtual simulation has dramatically accelerated the overall aircraft development process. However, physical testing remains a critical contributor to model validation, and to providing the understanding of structural characteristics of new materials and manufacturing processes. The outcome of aircraft Ground Vibration Tests (GVT) is used to update the aircraft’s analytical model and to predict the critical flutter speed. This is used as input for the aircraft flutter test to obtain its airworthiness certification.
The Structural Test Suite from Brüel & Kjær includes sensors, data acquisition, state-of-art test, measurement, modelling, post-processing and calibration in one seamlessly integrated system. At the centre of this suite are the modal testing solutions.
Modal testing is used to characterise the dynamic properties of structures, by determining the modal parameters such as resonant frequencies, damping and mode shapes. This helps:
- Identifying and animating load, fatigue and structural characteristics during in-flight conditions
- Troubleshooting problems in structures with excessive vibration levels
- Monitoring modal parameters to ensure structural integrity
- Verifying designs and updating modal parameters calculated from simulation models
The Structural Test Suite offers complete solutions for controlled excitation tests, real-life operational tests and test-finite element analysis (FEA) integration. This can be applied either to the smallest components or to the largest assembled structures.
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