Main Menu

See All Pages

Main Menu

See All Pages

Main Menu

See All Pages

Ground Vibration Test (GVT)

In aircraft Ground Vibration Testing (GVT), large modal tests for different aircraft configurations on the ground are performed to update the flutter boundary predictions before the first test flight is made.

Virtual simulation has dramatically accelerated the overall aircraft development process. However, physical testing remains a critical contributor to both validation of the simulation models and the understanding of structural characteristics of new materials and manufacturing processes.

Ground Vibration Test (GVT) is used to determine the modal parameters of a complete aircraft and is typically performed very late in the development process. The outcome is used to update the aircraft’s analytical models to predict the flutter boundaries (combinations of altitude and speed) and establish a safe flight envelope before the first test flight. Following the test flights, the analytical models are updated, the final flutter calculations made, and the aircraft obtains its airworthiness certification.

Ground Vibration Test is mandatory for new aircraft and for existing aircraft that undergo modifications. It is also performed on other structures such as helicopters and spacecraft.

System suggestion

Ground vibration testing system overview

A typical GVT system consists of modal exciter systems, modal accelerometers and LAN-XI data acquisition hardware. Measurements and post-processing are carried out with BK Connect® software. The test geometry is defined based on a Finite Element (FE) model of the test object. The FE model also provides the basis for a pre-test analysis to define excitation and response DOFs (Degree-Of-Freedoms), and for investigation of target modes.

This system is scalable, depending on the size of the test object, and especially for larger objects, the LAN-XI data acquisition hardware can be distributed, to minimize cabling.

Video: Watch NASA perform Ground Vibration Testing with BK Connect 

No more result to load


Structural Measurements – Hammer and Shaker

Intuitive software for geometry-guided real-time hammer and shaker measurements used for classical modal analysis.



Advanced Sine Measurement Software

Advanced Sine Software for real-time measurements of frequency response functions (FRFs) using stepped sine excitation for linearity studies and classical modal analysis.



Modal Analysis Software

Provides powerful tools for creating geometries and a comprehensive set of analysis and validation tools for single-reference modal analysis.



Advanced Modal Analysis

Advanced Modal Analysis software for creating geometries and a comprehensive set of analysis and validation tools for polyreference modal analysis.



Correlation Analysis Software

Correlation Analysis Software for correlating two modal models, typically consisting of a finite element model and a test model.

TYPE 4507-B

Piezoelectric CCLD Accelerometer, TEDS, 1 mV/g, Side Connector, 1 Slot, Excl. Cables

Designed for modal analysis measurement.


TYPE 4524-B

Triaxial CCLD Piezoelectric Accelerometer, TEDS

Designed for structural analysis measurements.