Natural modes are natural vibration patterns of a system with characteristic natural frequencies. Knowledge of this is crucial for understanding and optimizing the dynamic behaviour. A modal analysis can be used to determine the natural frequencies, mode shapes and damping properties of a system. Knowing this helps to better understand the vibration behavior and avoid potential problems associated with vibrations and resonances.
As a service provider for modal analyses, we offer you both experimental and numerical modal analyses.
Numerical and experimental modal analysis
We calculate and measure natural frequencies, mode shapes and damping for you. Both methods have their advantages. The application usually determines which choice is the most effective.
Talk to me - I will be happy to help you decide.
Dr.-Ing. Michael Kwade
Our services for modal analysis
Combining measurement and simulation
We combine the experimental and numerical determination of the eigenmodes in order to validate the plausibility of the results. Sometimes it is challenging to generate an exact result with numerical analysis. But also
Combining measurement and simulation
We combine the experimental and numerical determination of the eigenmodes in order to validate the plausibility of the results. Sometimes it is challenging to generate an exact result with numerical analysis. However, the measurement of the eigenmodes can also be inaccurate or generally difficult to implement (e.g. due to inaccessible parts). By performing both methods and comparing the results, we obtain valuable impulses for the detection of uncertainties. You benefit from a higher information content and receive results with guaranteed decision-making certainty.
Why are intrinsic modes often underestimated?
Our experience protects you from expense and miscalculation
Thanks to our numerous projects, we are familiar with the peculiarities and anomalies of modal analysis. We can assess the plausibility of results and ensure that you receive precise and meaningful analyses as a basis for decision-making. Why the calculation of eigenmodes is often underestimated:
Apparently quick results
Modal analyses quickly produce a result, but the quality and significance depend on many details that can easily be overlooked.
Influential details
Certain factors (e.g. material/geometric properties and boundary conditions) are crucial for accurate results and require an experienced eye.
Linearization
The need to linearize all elements for modal analyses is often forgotten or underestimated, but leads to incorrect results.
Experience in evaluating results
The interpretation and evaluation of the results require specialist knowledge and experience in order to assess their plausibility and derive well-founded decisions.
The value of careful work
Application example:
Precision in the acoustic test bench
High-precision results are required when determining the eigenmodes of an acoustic test bench. This is why we carried out the modal analysis for one of our customers both experimentally and numerically. A comparison of the results revealed deviations in the frequencies that would not have been noticeable without the comparison of measurement and simulation. The reason: simple carrying handles were mounted on the plate for transportation. For an inexperienced calculation engineer, these may not play a role in the vibration behavior of the aluminum block. However, we found out that they significantly influence the eigenmodes of the test stand - not with their stiffness, but surprisingly with their (minimal) mass.
What is your challenge?
Tell me about your challenge. I will be happy to advise you on the most efficient approach.