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Application Notes

All our application notes are available for download on www.myOROS.com. You should first be logged in to access this restricted area. If you have not yet an account, please create one. It's a 5-minutes form to fill in.
Here after is an extract of our application notes' library.

 

Aircraft noise reduction

 

 

 

 

 

DLR, Germany
Acoustic transmission and associated transfer functions are key to progress in aircraft noise reduction. DLR uses OROS OR36 for their tests. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

 

 

Wireless Vibration Monitoring on Aircraft Engines

 

 

 

GE Aircraft Engines, USA
GE Aircraft Engines, Component Test Department, uses the SmartRouter, the wireless controller unit for OROS Analyzers, to slash the set-up time of measurements. The team working on vibration measurements has been attracted by real-time, flexibility and multi-analysis capabilities of the OROS analyzers.
>> Read the full application note (be first logged in to myOROS)

 

 

Damage detection of aerospace structure

 

 

 

 

US Naval Academy, USA
From data  obtained using the method of impacting at a large number of test points (450 test points), SIDER, the Structural Irregularity and Damage Evaluation Routine, locates damage and structural variability on a tail plane. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

Damage detection on naval structure

 

 

 

 

US Naval Academy, USA
with 4 accelerometers, a midsize sledge hammer and an OROS analyzer only, the SIDER technique allows to inspect large area composite structures like a composite section of a half-scale Corvette ship hull. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

Impact testing and damper design to reduce cutting tools vibration

 

 

 

Saarland University, Germany
Increase machine tool efficiency study with a dynamic vibration damper on cutting tool.
>> Read the full application note (be first logged in to myOROS)

 

 

 

Laser based vibration measurement

 

 

 

 

Braunschweig University, Germany
The Technical University of Braunschweig uses an OR35 on their bearing test bench. The purpose of the test is to describe the phenomena involved in bearing noise generation. The measurement is based on a laser velocimeter for vibration measurements. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

Modal testing of a roll over protection structure

 

 

 

 

NVES, India
A complete modal analysis is realized on a Roll Over Protection Structure of a compactor machine to ensure that the natural frequencies of the structure are not in the frequency range of operation of the machine which may cause failure.
>> Read the full application note (be first logged in to myOROS)

 

 

 

Noise emission measurement on a concrete block press

 

 

 

IFF Weimar, Germany
IFF Weimar uses an OROS OR34 to measure noise emitted from a concrete block press. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

OMA on a highway bridge for model updating

 

 

 

 

NUAA, China
From the ambient response measurements on a highway bridge, the OROS Operational Modal Analysis solution establishes the dynamics of this civil structure usefull for finite element model updating and  dynamic response prediction.
>> Read the full application note (be first logged in to myOROS)

 

 

 

OMA on industrial robots

 

 

 

 

 

Kuka, Germany
The Operational Modal Analysis, an alternative method to the impact testing to characterize robot structure.
>> Read the full application note (be first logged in to myOROS)

 

 

 

Structural characteristics of drop test frame

 

 

 

 

Stress Engineering, USA
Stress Engineering Services (SES) realized tests to determine structural characteristics of a drop test frame. In particular, an OR36 was used to carry impact testing acquisition to determine the first bending mode of the frame. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

Torsional vibrations measurements on engine timing (camshaft)

 

 

 

Danielson Engineering, France
Downsizing car engines emphasizes critical timing adapation. It is mainly due to torsional vibration from the crancksaht and camshat coupling. Danielson eng. uses the OR36 with 6 torsional inputs plus strain gauges to tune the FEA model of a new 3 cylinders 2 strokes diesel engine.
>> Read the full application note (be first logged in to myOROS)

 

 

Floor-standing heating boilers Sound Power Measurement

 

 

 

Bosch Thermotechnology, GmbH
Achieving repetitive and comparable acoustic emission evaluation of heating boilers is key. For that reason Bosch Thermotechnology has installed a new test set-up to carry efficiently the test following ISO 3744. The test stand is based on OR36 and the OROS Sound Power Solution
>> Read the full application note (be first logged in to myOROS) or read the article on the OROS blog

 

 

API 613 Gearbox factory acceptance tests using OR36

 

 

Allen Gears, UK

API 613, from the American Petroleum Institute, is the standard for acceptance of industrial gear boxes using in the Petroleum industry. OR36 is used at Allen Gears to produce real time results and live report. 
>> Read the full application note (be first logged in to myOROS)

 

 

Critical speeds determination on a mobile gen-set

 

 

CLP Power, HK 
CLP Power uses OROS OR36 to carry diagnostics and troubleshooting on a mobile Gen-Set. In particular, they go through run-upand shut -downs to determine critical speeds
>> Read the full application note (be first logged in to myOROS)

 

 

 

 

Damage detection of civil infrastructure

 

 

 

 

US Naval Academy, USA
Structural data, FRFs and coherence, are  acquired  with an OR35 and analyzed with SIDER, the Structural Irregularity and Damage Evaluation Routine for one glass reinforced composite road bridge inspection. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

Dynamic measurement on a bladed turbine disk for mode shapes identification

 

 

 

Skoda Power, Czech Rep
The Skoda Power objective is to determine, with experimental tests and simulation results,  the correct mode shapes on a rotating disk of a steam turbine using axial, tangential and torsional excitations. 
>> Read the full application note (be first logged in to myOROS)

 

 

In-helicopter measurements

 

 

 

 

Conradt, Germany
A helicopter main rotor, which rotates at 6.5 revolutions a second, generates extremely high levels of vertical excitation throughout the aircraft.
>> Read the full application note (be first logged in to myOROS)

 

 

 

Measurement procedure validation using reduced scale rigs

 

 

 

PTB, Germany
The Applied Acoustics department at the PTB uses OR38 to validate measurement procedures. Validations are carried out based on 1:8 scales testings. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

Modal testing on the gondola of a wind turbine for model validation

 

 

 

ICR, Spain
To establish the dynamics of the gondola of a wind turbine from a numerical model, experimental results are necessary. An Experimental Modal Analysis has been realized on a protype with the OROS modal solution to validate the model. 
>> Read the full application note (be first logged in to myOROS)

 

 

 

OMA on a cable-stay bridge for structural health monitoring

 

 

 

NUAA, China
The Ting Kau Bridge, a cable-stayed bridge located in Hong-Kong, has been equipped with several sensors fixed inside the bridge and results from Operational Modal Analysis are used to structural health monitoring.
>> Read the full application note (be first logged in to myOROS)

 

 

 

OMA on a large span roof for structural health monitoring

 

 

 

 

NUAA, China
An ambiant modal testing with 264 measurement nodes, was conducted to the roof of the TTBDyo Horse Racing Stadium.  The dynamic characterization of this civil engineering structure is used to structural health monitoring.
>> Read the full application note (be first logged in to myOROS)

 

 

 

Predictive maintenance on wind turbines

 

 

 

 

La Compagnie du Vent, GDF Suez, France
How to install a a system on the machine train for the predictive maintenance of its elements: rotor, slow shaft, gearbox, speed shaft and generator.
>> Read the full application note (be first logged in to myOROS)

 

 

 

Temporary vibration monitoring

 

 

 

 

GRTgaz, France
Diagnostic of a compressor train using an OROSremote monitoring system.
>> Read the full application note (be first logged in to myOROS)

 

 

 

Vibration and dynamic strain gauge measurements, aero engine test bench

 

 

China Gas Turbine Establishment (CGTE)
How to establish high count channel capability? How to synchronize the channels between different units, the data throughput, the real-time analysis capability, and all other issues?
>> Read the full application note (be first logged in to myOROS)

 

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