Saeed Zohoori - Research Assistant, Center of Advanced Systems and Technologies (CAST), School of Mechanical Engineering, College of Engineering, University of Tehran, Iran
Ahil Yousefi-koma - Professor at University of Tehran, Center of Advanced Systems and Technologies (CAST), School of Mechanical Engineering, College of Engineering, University of Tehran, Iran
Fariba Mahmoodi Yamchi - Center of Advanced Systems and Technologies (CAST), School of Mechanical Engineering, College of Engineering, University of Tehran, Iran
Aref Nazari - Center of Advanced Systems and Technologies (CAST), School of Mechanical Engineering, College of Engineering, University of Tehran, Iran

This paper presents the effects of dynamic properties of thefixture, especially transmissibility in experimental fatigueanalysis. Endurance limit extraction of structures demandslarge stresses to be applied. Therefore, high powerequipment would be needed for excitation. Improvingfixture design considering dynamic properties can lead tothe same stress levels by using lower power shakers. In thispaper transmissibility feature of the designed fixture isenhanced, so that the generated motion by shaker isamplified and transferred to the structure being tested,which is a compressor blade. The procedure involves fixturemodeling and implementation of numerical simulation fornatural frequency determination. Knowing the first naturalfrequency of the blade, transmissibility value is extractedusing theoretical equations. After achieving the desiredmagnification, the fixture is fabricated and experimentaltests are performed.

Fixture - Transmissibility – Fatigue – Blade –Mechanical Impedance