Open AccessSimulation Analysis of Mechanical Performance of the Broadband Coaxial Step Attenuator
Author(s) -
Zhigang Kong,
Peng Liu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1670/1/012003
Subject(s) - attenuator (electronics) , coaxial , finite element method , materials science , attenuation , structural engineering , stress (linguistics) , contact mechanics , broadband , mechanical engineering , engineering , optics , telecommunications , physics , linguistics , philosophy
In this paper, the structure and performance of broadband coaxial step attenuator are studied by simulation. Through the finite element static structure simulation, the stress and strain of the internal structure of the step attenuator are analyzed. The contact pressure, contact state and contact stability between the reed and the attenuation unit are analyzed. The theoretical analysis and calculation of the fatigue life with the nominal stress method are carried out. At the same time, the structure of the reed is optimized and improved for better performance. Then the dynamic mechanical properties of the structure are analyzed. The finite element simulation results show that the maximum stress is 395.53MPa. Due to the high stress in the contact area between the reed and the ejector rod, there will be micro cracks at these stress concentration positions under the constant impact of the ejector rod on the reed. The micro cracks gradually grow up and finally form the macro cracks, which lead to the reed fracture.