Finite Element Analysis of Vibration Fixture Made of Aluminum and Magnesium Alloys

Vibration is the most important modes of failure in avionic equipment. The avionic equipment fitted into the aircraft has to withstand high vibrations. As vibration equipment cannot be placed directly on the vibration machine shaker table, a mechanic structure called fixture is placed between the equipment and the machine. The avionic equipment under the test has to withstand a random excitation with frequency range of 20 - 2000Hz. In this work designing the fixture that supports the unit and the vibration machine while taking into consideration that its natural frequency does not occur in the excitation range of the unit. These fixtures are generally used for supporting electronic equipment which is used in missiles, fighter aircrafts. The fixture is designed such that its natural frequency does not fall under the frequency range of 20 - 2000Hz. After selecting the suitable design of vibration fixture as per the requirement, it is analyzed by using finite element analysis.