Marine Industries - Noise and Vibration Test and Measurement Solutions0 pages

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Made for Your
Demanding World
1- Improve Efciency

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Measuring your Ships and Propulsion Systems

2- Maximize Uptime

Test Cells

3- Minimize Costs
Improve production testing
efciency

> Prototype validation

> Integrated & automated test
process and report generation

> Factory acceptance

> User friendly operation
> Mutichannel real-time processing
and diplays
> Universal and multiple sensor’s
types: microphones, acceleration,
temperature, strain, pressure…

Rotating Analysis

Shipbuilding

Torsional Analysis

> Hull

On reciprocating machinery the cause of vibrations often comes from
the non-linearity of the angular speed.

> Tower

Thanks to the integrated frequency to RPM converter, the OROS analyzers provide the
instantaneous angular speed inside each shaft revolution.
The analysis of this speed in frequency or time domain give helpful information for
vibrations reduction during prototyping or for source identication while doing service
diagnostics.

> Air Conditioning

Travel light for reliable tests

> On-board acceptance

> Versatile toolbox for all noise and
vibration diagnostics applications

> Maintenance operation

> Distributed acquisition systems over
the ship

> Diagnostics and
troubleshooting

> Portable and rugged analyzers for
eld measurements
> Multichannel simultaneous
acquisition
> Real-time analysis for eld efciency
> Distributed acquisition systems over
the ship

Remote Monitoring

Optimize costs and prevent
failure

> Random & unrepeatable
phenomena

> Alarm trigerring warning via email or
the Internet
> Collect raw signal information for
thorough ofce processing

> Compressors

thanks to its toughness and its complete panel of functions.”

Chris RINGLE, 44

Noise and Vibration Maintenance Engineer,
Propulsion Department.

oros.com

www.

Damping & Isolation

Modal Analysis

Reciprocating machines are complex installations. They generate specic
vibration signatures. The objective is their performance optimization and faults
detections. For example, injection delay, valves faults, segmentation wear can be
identied with EngineDiag. This software module integrates the machine mechanical
properties: number of cylinders, ring order and timing diagram, allowing to provide
pertinent decision criteria on the eld. Time signal, overall levels as well as
angle-frequency representation on the machine cycle are efcient results for diagnostics.

Modal Analysis is one of the key steps when testing machines: it
determines their structural characteristics and so, denes how they reacts
to operating excitations. Shaker or impact hammer excitations can be used to
capture the experimental datasets: the nal stage is the actual OROS modal analysis.

Gear Analysis
Gearboxes is a very critical part of transmission and has specic vibration
signature requiring correlation or cepstrum analysis for an accurate diagnostics.
The correlation is useful to determine the correlated part of signals from different locations
on a structure. This helps tracking the root and cause of vibration phenomena machinery
structure and/or cinematic.
The cepstrum is an efcient tool to detect periodic shocks in bearings or parts of rotating
machinery. It is specially adapted when the spectrum levels are noised with their impulsive
components.

Propulsion Systems
> Gas Turbines
> Diesel Engines
> Generators
> Motors
> Gearboxes

Roller Bearing Analysis
Damaged roller bearings are common vibration sources. Their vibration
spectrum, measured with an accelerometer mounted on the casing, allows you
to determine mechanical failures on balls or races. Envelope demodulation and
kinematics markers, part of FFT-Diag module, are the key tools for that purpose.

Experts from OROS come on-site for applied trainings. They will help you using your OROS
system. They can provide assistance in your measurement. They are also able to
recommend optimization in your measurement process depending on your application and
eld requirements.

> “With my OROS analyzer, I’m really condent during on-board measurements

A powerful analysis to solve problems related to forced vibrations. Only
with few measurement points, determine the source of high vibration level
and the structural modications to be implemented on the machine.

Absorbing and damping mounts are the components through which the
vibration energy is transmitted between the engine and the rest of the
ship: their properties, dimensions and positions should be determined with care. The
techniques used are cross spectrum, transfer functions, damping, as well as ODS
(Operating Deection Shape).

With torsional analysis, detect, follow the torsional resonance of the shaft and, for
example, identify problems due to exible coupling

On-Site Measurements & Applied Trainings

They trust OROS

ODS (Operating Deection Shape)

> Pumps

Reciprocating Machine Analysis

On-board Testing

Structural Dynamics

> Flexible Coupling

Noise Analysis
Structure-Borne Noise Analysis
This technique uses acoustics tools, typically 1/3 octave analysis.
The results allow to identify and reduce the transmission to StructureBorne Noise.