Trac Provides Testing Services For Rolls-Royce

Trac has extended its relationship with Rolls-Royce in the UK following the award of a two-year embedded supplier contract to support aircraft engine development and production. The contract is for the supply of impact impedance test (modal analysis) expertise. Trac has supported Rolls-Royce on testing programmes for a variety of aero-engines that power the Airbus 380, Boeing's Dreamliner and several types of military aircraft.

Trac supplies engineers for onsite test work at Rolls-Royce's Derby facility and has created bespoke testing capabilities at its own Warwick site. Trac provides Rolls-Royce with a full-time on-call engineer at its facility in Derby, with the option to utilise additional trained engineers at short notice. 'Trac has supported experimental vibration testing covering high cycle fatigue, strain gauge calibration and, in recent months, impact impedance testing,' said Stuart Brown, environmental and analysis managing director.

'Trac offers engineers with the skill sets and flexibility that meet Rolls-Royce's exacting requirements,' he added. Trac has a UKAS-accredited high cycle fatigue (HCF) facility in the UK and can offer both electromagnetic or airjet excitation techniques. High cycle fatigue testing subjects components to accelerated life testing by applying mechanical stress across a wide range of frequencies. As well as directly testing components and demonstrating satisfactory fatigue life, the data gathered by high cycle fatigue testing is used to validate mathematical models for computer analysis.

The company also has a full range of related skills in frequency checking of components in both of the modes known as 'Free-Free' and 'Fixed-Free'. This technique, which can be used on batch samples, can be used to compare samples and to reveal mode (resonant) frequencies prior to full HCF testing. Trac has the expertise to apply state-of-the-art frequency analysis tools to this process to ensure a high degree of accuracy and consistency in the results.

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