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ISMB Schwingungsanalyse Vibration
Vibration measurements

Professional measurement services for your project

Do your machines or products have unexpectedly high vibration levels? Would you like to avoid resulting damage and signs of wear, increase comfort and reduce noise? Benefit from our more than 25 years of experience from projects for mechanical engineering, the automotive industry, aerospace, plant engineering, electrical engineering and medical technology. We are your reliable and competent partner for vibration measurement in Germany and worldwide. Using the latest measurement technology, our experienced engineers carry out vibration measurements adapted to your product for every mechanical task. From the findings of the vibration test, we derive constructive suggestions for the targeted optimization of your products and processes. We pay special attention to the detailed analysis of the recorded measurement data, including the combination of simulation and measurement.

ISMB offers you a wide range of different services relating to the investigation of the vibration behavior of your products. In order to meet the high demands of our customers, each order is given an approach tailored to the individual task. In this way, we guarantee optimal results and the highest customer satisfaction.

Vibration measurements: Overview

Vibration measurements play an important role virtually everywhere in industry. From large manufacturing plants to small electrical appliances, precise knowledge of vibration behavior is indispensable. Typical areas of application are the structural dynamic design of components as part of product development, the economic optimization of machines and processes, and the maximization of service life.
The measurement methods are diverse. Below you will find an overview of the services ISMB offers in the field of vibration measurement.

Our services at a glance

Stirnradgetriebe 1
spur gearbox
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Tilgerauslegung 2 englisch
dynamic vibration absorber
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Positionierruettler 1
vibration positioner
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Positioniermotor 2
positioning motor
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Humanschwingungen Motorsaege 1
human vibration
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Operating vibration measurement

Identify and permanently reduce unwanted vibrations

Vibrations or oscillations also occur in all machines during regular operation. A distinction must be made between desirable and undesirable vibrations. The vibration level can have a considerable influence on the volume, durability and safety of machines and systems. If the vibrations that occur are too strong, quick action is therefore required to ensure the safety and specified service life of the machine or system in question.

Within the scope of vibration testing, we identify the causes and effects of machine vibrations. With the help of the latest measuring technology, we carry out targeted measurements of the vibrations that occur. The observed vibration behavior is then analyzed in detail by our experienced engineers. Based on the measurement results, well-founded statements can be made about the vibration behavior of your machine.

We support you in the development of concepts to reduce the vibration level or to prevent unwanted resonances and to comply with the permissible vibrations of your machines.

Experimental modal analysis

How do objects react to external forces?

Every component, every machine or system has characteristic natural frequencies and natural modes of vibration that determine its vibration behavior. If an object is vibrated by an external or internal exciter with an excitation frequency that is close to these natural frequencies, large vibration amplitudes can occur and resonances form. In the worst case, these resonance vibrations can lead to damage or even destruction of the object. Such natural frequency resonance phenomena should therefore be avoided, or vibration-optimized systems should be designed. For this purpose, the natural frequency or the resonance frequency must first be measured.

Practical modal analysis: shaker

For this purpose, we offer experimental modal analyses of the vibration behavior of your products. The test object is excited by external forces. We usually use a suitable impulse hammer to artificially vibrate the test object. Depending on the requirements, we use shakers for the modal analysis. Based on the recorded transfer functions, we create a modal model from which precise statements about the vibration behavior of your machines, systems or components can be derived.

Of course, the test specimen remains intact during this process. Depending on the situation, a computational or numerical modal analysis can be used instead of an experimental one, i.e. a digital simulation of the vibration behavior using FEM.

Areas of application

In many areas it is advantageous or even indispensable to know the vibration behavior of components or systems precisely. Modal analysis is therefore just as relevant for the design of engine housings and aircraft wings as it is for the construction of household appliances. In addition, operational vibration analyses or modal analyses play an important role in mechanical engineering in order to adapt systems ideally to their intended use.
Lebensmittelmuehle 1 englisch
food mill
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Free Consultation

Our specialists are always at your disposal to flexibly respond to your respective requirements and wishes.

Michael Elbs, Managing Director

+49 8341 966 127-0Mon - Fri   9:00 - 17:00info@ismb.de
Michael Elbs

Vibration tests

What vibrations can my components withstand?

In many industries, the vibration resistance of components must be checked before they can be sold or installed. It must be ensured that they meet the respective requirements in terms of structure and safety. Their integrity under typical continuous load as well as in extreme situations can be relevant.

With the help of vibration tests, component vibrations can be measured and optimization potential derived. For this purpose, we mount the test specimen on a device specially developed for your application, which is made to vibrate with predefined excitation spectra in order to authentically simulate the expected environmental influences. Similarly, mechanical shock tests can be carried out to investigate the structural condition of components.

Our vibration shaker tests offer you several advantages. On the one hand, they ensure the integrity of your products and after passing the test, you can be sure that they will withstand the loads in their intended area of use. On the other hand, vibration tests/shaker tests help to uncover any weak points in your designs so that they can then be targeted and remedied.

Areas of application

Among other things, shock tests and vibration tests are widely used in the automotive sector. Electronic components for cars, which are later exposed to constant vibrations, are tested for their resilience and durability by vibration testing with shakers.

Signal analysis

How is measurement data correctly interpreted?

From our point of view, the detailed evaluation of available measurement data is a decisive step towards solving vibration tasks. Only if the measured vibrations are interpreted correctly, the causes of problems can be identified, and optimization potentials be uncovered. The complex field of signal analysis is therefore one of ISMB's core competencies.

Based on frequency analyses, the dynamic properties of a system can be extracted with the help of task-specific signal analysis. Thus, among other things, it can be precisely investigated how the system reacts to the excitation frequencies present. For the signal analysis of time-invariant and time-variant vibration quantities, we use the following methods, among others:
  • Spectral analysis: FFT, auto spectra, transfer functions with phase reference, coherence functions
  • Waterfall or sonogram display of the time or speed-dependent development of spectra
  • Order analysis, Campbell representation, order cuts, Vold-Kalman filtering, resampling
  • Wavelet analysis
  • Speed detection from analogue or TTL signal; alternatively: derivation of the speed curve from suitable vibration signals
  • Envelope analysis, Hilbert transformation
  • Cepstrum analysis
  • Representation of operating vibration modes on wireframe models (ODS)
  • Expansion of measured vibration shapes on FE models
  • Filtering of measured data with low-pass, high-pass and band-pass filters
  • Analysis of vibration orbits
We also use these methods to evaluate transient and highly transient events, such as switching or impact processes.

Areas of application

The application of signal analysis covers almost all types of vibration tasks. When vibration-related problems occur on vehicles or industrial equipment, it is usually a central part of the problem-solving process. Signal analysis can also be important in optimizing manufacturing processes, for example when products do not have the expected properties or are damaged by the machines involved.
Hafenmobilkran 2
mobile crane
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Validation/correlation of test and FEM

How is the correctness of FEM simulations ensured?

An important function of vibration measurements is FEM model validation. FEM stands for Finite Element Method and represents a virtual simulation procedure for the vibration behavior of objects. FEM analysis is a widely developed and reliable method. As an important supplement, the validation of FEM simulations provides an additional level of security with regard to the correctness of the results.

As part of the FEM validation, we compare simulation results with real measurements. This comparison provides information on how approximations, uncertainties and assumptions in the model influence the simulation results. Conversely, the influence of the measurement methods used on the results is shown. In this way, the validation of simulation models/FEM enables a reliable and precise analysis of the vibration behavior of your machines and products.
Free Consultation

Our specialists are always at your disposal to flexibly respond to your respective requirements and wishes.

Michael Elbs, Managing Director

+49 8341 966 127-0Mon - Fri   9:00 - 17:00info@ismb.de
Michael Elbs

Building vibrations

Is there a risk of damage to people, machines or buildings?

Construction work, passing traffic, but also the operation of stationary machines, such as presses, can introduce vibrations into buildings and thus affect the health and well-being of people, disrupt the function of sensitive production machines or measuring machines and, in extreme cases, cause damage to buildings. For the detection and evaluation of building vibrations, we carry out vibration measurements for you in accordance with DIN 4150 and are also happy to advise you on the development of remedial measures.