- Structure Analysis with imc WAVE structure
The imc Structural Analyzer can be used to analyze structural dynamic problems in components that lead to noise generation, fatigue or destruction. For this purpose, a defined force signal is introduced into the structure and the dynamic response is measured with accelerometers. The synchronous computation of all signals allows the determination of the transfer function, which fully describes the vibration behavior of the structure. Resonant frequencies can be determined from the transfer function, and with their help, statements can be made about bending and torsional stiffness. This, in turn, can be used to draw conclusions about the structure's service life. For further processing of the transfer function, interfaces to modal analysis programs are available in addition to the imc FAMOS signal analysis software.
- Spectra of force F [N], acceleration a [m/s2]
- Depending on the sensor: propagation of Speed v [m/s]
Transfer functions as ...
- Calculation of transfer fuctions from input signal to output signal
- Determination of coherence as a quality characteristic
- Determination of output signals for an optional modal analysis
- Determination of von power spectra
- Product qualifications
- Product optimization in development
- Quality assurance for end-of-line
- Interface between simulation and testing
What are resonance frequencies?
Resonance frequencies (natural frequencies) occur in components which get a maximum amplitude by forced vibration at a certain excitation frequency. Here, a small exciting force is sufficient to generate a high vibration amplitude. To reduce the amplitude of oscillation, damping is required.
A distinction is made between amplitude resonance and phase resonance. In contrast to amplitude resonance, one speaks of phase resonance when the steady-state forced excitation oscillation lags by exactly 1/4 period (i.e. a phase shift of -90°). In most cases, systems that vibrate have several resonance frequencies, for example several maxima of the vibrations are caused by the forced vibrations.
Which sensors are needed for a measurement in structural analysis?
- Impulse hammer with force sensor.
- IEPE sensors for acceleration or vibration velocity.
Can the structural analyzer be combined with other imc WAVE analyzers?
No, imc WAVE structure is an independent analyzer for measurements with the impulse hammer and its own report.
However, there are structure analysis functions that work together with the other analyzers.
Transfer functions and coherences can be analyzed for so-called shaker measurements.