About
Modal Vibration Shaker
Full range of modal and inertial shakers with integrated and easy-to-use amplifiers. Our permanent magnet shakers are compact, lightweight, and powerful general-purpose shakers that can be used for modal and vibration testing. They have a high DUT capacity despite their small sizes.
About
Modal Vibration Shaker
Full range of modal and inertial shakers with integrated and easy-to-use amplifiers. Our permanent magnet shakers are compact, lightweight, and powerful general-purpose shakers that can be used for modal and vibration testing. They have a high DUT capacity despite their small sizes.
Product
Features
Modal shakers
Modal testing can be performed with modal hammers or shakers. If high-frequency excitation content or signal-controlled testing is desired, then modal shakers are the only excitation solution. Dewesoft modal shakers are lightweight and powerful modal shakers that can go up to 15,000 Hz and provide force levels up to 440N with a maximum 25mm stroke.
Advantages
- Modal stinger can be easily adjusted by the through-hole armature
- Lightweight, durable, portable, and easy to use
- The adjustable trunnion base provides high flexibility
- Up to 25mm stroke and broad frequency range
Additional
Information
Applications for modal shakers
Modal shakers can be used for Modal testing and Structural Dynamics.
The series of Dewesoft modal shakers covers a wide range of structures for dynamic characterisation from electronic boards and sub-components to machinery, vehicles and aircraft, and even constructions.
- Components, Machinery, Vehicles, Aircraft, and constructions
- Aerospace and
- Automotive
Modal Testing is a prerequisite for design and product validation in aerospace and automotive industries as well as many others.
Modal testing and modal analysis
In real-life applications, machine parts and mechanical systems are rarely under static loading. Most of the time they are excited by dynamic loads. The structure responds to these dynamic loads according to its dynamic parameters such as natural frequencies and mode shapes. Therefore, an engineer has to have a solid insight into the dynamic behaviour of the structure which has been designed. The process of finding the dynamic behaviour of a structure is called structural system identification.
Structural system identification consists of finding the transfer function of the system which is established by finding the modal parameters of the structure such as natural frequencies, damping, modal vectors, and residues.
The transfer functions of a structure can be obtained by mathematical modelling or by experimental methods. The experimental way to obtain the transfer function of a structure is achieved by measuring the response of the structure to a measured input. The responses are generally acceleration and the inputs or excitations are generally impulses or random/sine signals.
The impulse signal is easily generated by a modal hammer with a force transducer attached at its tip. The random or sine signal excitation requires modal vibration shakers. Moreover, if high-frequency excitation content or signal-controlled testing is desired, then modal shakers are the only excitation solution. Dewesoft modal shakers are lightweight and powerful modal shakers which can go up to 15,000 Hz and provide force levels up to 440N with a maximum 25mm stroke.
The modal shaker is attached to the structure and the desired excitation signal is applied to the structure via a signal generator. In the meantime, the responses of the structure are
measured and Frequency Response Functions are calculated which are used in the Modal Analysis calculations.
For more information check out Dewesoft Modal test and analysis solution.
Permanent magnet shakers
Dewesoft permanent magnet shakers are compact, lightweight, and powerful general-purpose shakers that can be used for modal and vibration testing. They have high DUT capacity despite their small sizes. PM-20 and PM-100 have an integrated amplifier and a sine wave signal generator where the frequency can be adjusted from 1 Hz to 15,000Hz.
Advantages
- Lightweight, durable, portable, and easy to use
- An adjustable trunnion base provides a high degree of flexibility
- Broad frequency range
- Embedded power amplifier and signal generator for PM-20 and PM-100
Applications for permanent magnet shakers
Permanent Magnet shakers are used for Vibration testing and Shock testing:
- Vibration testing of micro parts, assemblies, and electronics Modal testing
- Shock testing
- Sensor calibration
- Separation and compacting of powders
- Fatigue and resonance testing
- Velocity transducer or high-speed actuator
- Mechanical impedance measurement
- Education and research
Inertial shakers
The shakers used in modal testing and in-flight tests of aircraft are usually electrodynamic shakers. However, the traditional shakers are not very portable and the attachment process takes time. Dewesoft inertial shakers are easily mounted and have great mobility. It can be used as a handheld.
Advantages
- Compact and lightweight design
- Superior low-frequency performance
- Any angle mounting
- Low friction bearing guided
Applications for inertial shakers
Inertial shakers are used for Vibration and Modal testing. Inertial shakers are used for testing car chassis, squeaks, and rattle testing in cars, civil engineering prototype testing, building structures, floor loading resonances, ships’ flight decks, and helicopters rotor simulation, submarines, geophysical surveys, and vibration cancellation systems.
- Civil engineering
- Automotive
- Aerospace
- Shipbuilding
- Education and research
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