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Vibration and shock

 

VTT Vibration and shock

​​We focus on:

We know the vibration origins in target applications and how to treat excitations and transfer paths. We can meet the challenges and use the opportunities that different material properties bring to vibratory questions. Together with our client we will find the best means of obtaining desired vibratory responses. We can also verify that Your product meets vibration specification and complies with standards.

For specific tasks we can help You with, see Offerings.

VTT Proactive design, control solutions and montítoring Our main application areas are:

  • Rotating machines
  • Vehicles
  • Mobile machinery
  • Combustion engines

Offerings 

 

​​​Automated vibration design

Analysis software and scripting languages together with effective calculation hardware offer great possibilities to develop automatic simulation systems to support the vibratory design of structures.

 

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​​​Seismic, impact and shock compliance

Products intended for harsh operating environment requires careful design in order to fulfil all given requirements. VTT can offer both experimental and simulation activities for designing structures and components to seismic, impact and shock environments.

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​​​Vibration control devices

VTT has two novel options for mitigation of vibration and shocks: Resonance Killer broadband passive mass damper and G-limit shock isolator.

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Reference cases

 

​​​Resonance Killer

Vibration level of an engine component was over the limit due to resonance. Installing a Resonance Killer reduced the vibrations well below acceptable level.

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​Tools

Main software

VTT has licences for several analyzing softwares for FE-modelling and simulation. For data aquisition and signal prosessing we have equipment for different kinds of purposes. We also use open source platforms, such as python (programming language) and Code_Aster (FE-modelling). We have experience on extending capabilities of commecial simulation tools by creating user scripts. We have also created specific in-house simulation tools, e.g. MODYSOL.

Modelling and analysis software

  • FEM: Abaqus, ANSYS, MSC Nastran, NX Nastran, Altair Optistruct, Code_Aster (open source)
  • Pre/post processing: FEMAP
  • Multi body simulation (MBS): Simulia/SIMPACK, MSC Adams
  • Computational fluid dymanics (CFD): ANSYS/Fluent, Abaqus/CFD, OpenFOAM (open source)
  • Optimisation: Altair Optistruct, Simulia/Tosca, Simulia/Isight, DAKOTA (open source), FemTools
  • Multiphysics: COMSOL Multiphysics, MpCCI
  • FEM/Test correlation: FemTools

 

Facilities

High Performance Computing (HPC)

  • Efficient computational research requires powerful computational resources.
  • Own computing resources (such as several cluster systems, computing servers and high-end workstations) provides flexibility and speed in resource utilisation and data security
  • “the Doctor”
      • VTT’s largest computing cluster
      • provides sufficient computing power even for demanding cases
      • contains almost 100 computing nodes and over 2000 CPU cores

 

Resonance table Resonancetable.jpgResonancetable.jpg

  • Can be used for vibration control research
  • Table is supported with steel springs that allow 3D vibration
  • Modal mass of the table varies from 250 to 1000 kg
  • Resonance mode of the table is comparable to mode of an industrial machine or structure (e.g. diesel or electrical engine)

 

Shock test table

  • Subjecting test specimens to high shock acceleration
  • Quick and affordable validation of Your product shock tolerance
  • Dimensions of the table: 1.0 m x 1.2 m
  • Typical acceleration is 60 g and velocity 2.5 m/s when payload is 0-50 kg
  • Typical acceleration is 50 g and velocity 2.4 m/s when payload is 250 kg
  • Typical acceleration is 35 g and velocity 2.2 m/s when payload is 500 kg

 

Damper dynamometer Tärinävaimentimien testauslaitteisto.jpg

  • Measuring stiffness and hysteresis behaviour of dampers and structural members
  • Dynamic force range, 0 - 8.9 kN , stroke depth 0 - 203 mm , frequency static - 100Hz

 

Drop tester

  • Examing the damages of small specimens when dropped
  • Dimensions: height 3100 mm, width 800 mm and depth 700 mm

 

We are equipped for comprehensive and demanding vibration testing:

  • Measurement data acquisation systems for various needs
        • For example: LMS Scadas 316, Dataphysics Quattro, Imc Cronos/Cansas, NI & Compact RIO
        • Acceleration, velocity, displacement and pressure sensors and strain gauge measurements
        • Complemented by temperature, acoustic emission (AE), noise or hydrophone measurements
        • Quick test setups of only a few channels or large setups of 100+ measurement channels
        • Data acquisition rates of up to 100kHz

 

  • Electrodynamic exciters (maximum force up to 400N)
  • Hydraulic exciter (can be used at customer's location, maximum force up to 15 kN)
  • Calibration facilities as well as equipment provider calibration services

 

CUSTOMER SERVICE
Emailinfo@vtt.fi
Tel.+358 20 722 7070
Opening hours Mon - Fri 9:00 - 11:00 and 12:00 - 15:00, UTC +3 time zone

CONTACT US

P.O. Box 1000, FI-02044 VTT, Finland
Tel. exchange +358 20 722 111
Opening hours Mon - Fri 8:00 - 16:30,
UTC +3 time zone

CUSTOMER SERVICE

info@vtt.fi
Tel. +358 20 722 7070
Opening hours Mon - Fri 9:00 - 11:00 and 12:00 - 15:00,
UTC +3 time zone