Shock Response of an Antenna Structure Considering Geometric Nonlinearity

Date

2016-01-28

Author

Ozcelik, Yunus Emre
Ciğeroğlu, Ender
Çalışkan, Mehmet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

224
views

0
downloads

Antenna structures used in electronic warfare, radar, naval, satellite, spacecraft systems encounter mechanical shock from various sources such as near miss under water explosion, pyrotechnic and ballistic shocks. Since most of the antenna structure has larger dimension in longitudinal direction and experience high frequency, high amplitude shock energy, geometric nonlinearity become crucial to predict dynamic behavior in real life. In this study, the antenna structure is modeled by Euler-Bernoulli beam theory including geometrical nonlinearity. The resulting partial differential equations of motion are converted into a set of nonlinear ordinary differential equations by using Galerkin's Method, which are solved by Newmark. The results for the linear system obtained from time integration and approximate methods such as Absolute Method, Naval Research Method, and Shock Response Spectrum Method (SRS) are compared to the nonlinear ones. Moreover, these results are compared with the ones obtained from commercial Finite Element software.

Subject Keywords

Antenna structure, Mechanical shock, Nonlinear dynamic analysis, Finite element method

URI

https://hdl.handle.net/11511/33245

DOI

https://doi.org/10.1007/978-3-319-29739-2_6

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Modeling and experimental verification of dynamic characteristics antenna structure under mechanical shock using MDOF model Özçelik, Yunus Emre; Ciğeroğlu, Ender; Çalışkan, Mehmet; Department of Mechanical Engineering (2015) Antenna structures used in electronic warfare, radar, naval, satellite, spacecraft systems encounter mechanical shock from various sources such as near miss under water explosion, pyrotechnic and ballistic shocks. Since most antenna structures have larger dimension in longitudinal direction and experience high requency, high amplitude shock energy, geometric nonlinearity becomes crucial to predict dynamic behavior in real life. In this thesis, an antenna structure is modeled by Euler-Bernoulli beam theory i...
Shock analysis of an antenna structure subjected to underwater explosions Demir, Mehmet Emre; Çalışkan, Mehmet; Department of Mechanical Engineering (2015) Antenna structures constitute main parts of electronic warfare systems. Mechanical design is as crucial as electromagnetic design of antenna structures for proper functioning and meeting high system performance needs. Failure of mechanical and electronic structures operating under shock loading is a common occurrence in naval electronic warfare applications. A complete shock analysis of the dipole antenna structure subjected to underwater explosions is performed to foresee adverse effects of mechanical shoc...
Numerical Validation of a Pyroshock Test System and Application to Qualification Tests Yalçınkaya, Tuncay; Gursoy, Bahadir (2022-08-01) Spacecraft are exposed to severe mechanical loads, i.e., shock loads, during their journey to orbit. Such loads usually develop due to a separation event through the activation of pyrotechnic devices. They might be transmitted throughout the entire structure and strongly influence the service performance of electronic components. Therefore, it is crucial to study whether the instruments can resist such a harsh environment. However, due to the vulnerability and high cost of the equipment, experimental setups...
Comparison of Outer Rotor Radial Flux and Axial Flux PM Motors for CMG Application Ertan, Hulusi Bülent (2014-09-05) Control moment gyroscopes (CMG) are used in modern satellite applications for attitude control of satellites. The volume and mass of the instruments is very important in such applications. In this context, integrating the mass of the CMG, on the stator of the motor, promises to save space and mass. Radial-flux outer-rotor motor is a promising configuration in that respect. In this paper, using such a PM motor is considered for control moment gyroscope applications. The design of the motor must be made such ...
Numerical and experimental investigation of radar absorbing performance of composite materials with frequency selective surface Subaşı, Buse; Şimşir, Caner; Department of Metallurgical and Materials Engineering (2022-11-18) Materials having radar absorbing property show critical importance for space vehicles in defense industry. Among all of the radar absorption mechanisms, use of frequency selective surface has become prominent. In this thesis, composite material having frequency selective surface was developed, manufactured and characterized. Designing of frequency selective surface operating in 8.2 – 12.4 GHz frequency range was conducted by means of finite element analysis method. In addition to radar absorbing performance...

Citation Formats

Y. E. Ozcelik, E. Ciğeroğlu, and M. Çalışkan, “Shock Response of an Antenna Structure Considering Geometric Nonlinearity,” 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33245.