Vibration Isolation of A Symmetric Rigid Plate Using Pair Pre-bent Struts with Intermediate Bonded Filler at Each Corner under Static and Dynamic Axial Excitation
Elkafrawy, A., Kandil, A., Helaly, M., Omar, A. (2012). Vibration Isolation of A Symmetric Rigid Plate Using Pair Pre-bent Struts with Intermediate Bonded Filler at Each Corner under Static and Dynamic Axial Excitation. EKB Journal Management System, 16(2), 29-40. doi: 10.21608/pserj.2012.114380
Ali Elkafrawy; Anwar Kandil; Moustafa Helaly; Abu-Bakr Omar. "Vibration Isolation of A Symmetric Rigid Plate Using Pair Pre-bent Struts with Intermediate Bonded Filler at Each Corner under Static and Dynamic Axial Excitation". EKB Journal Management System, 16, 2, 2012, 29-40. doi: 10.21608/pserj.2012.114380
Elkafrawy, A., Kandil, A., Helaly, M., Omar, A. (2012). 'Vibration Isolation of A Symmetric Rigid Plate Using Pair Pre-bent Struts with Intermediate Bonded Filler at Each Corner under Static and Dynamic Axial Excitation', EKB Journal Management System, 16(2), pp. 29-40. doi: 10.21608/pserj.2012.114380
Elkafrawy, A., Kandil, A., Helaly, M., Omar, A. Vibration Isolation of A Symmetric Rigid Plate Using Pair Pre-bent Struts with Intermediate Bonded Filler at Each Corner under Static and Dynamic Axial Excitation. EKB Journal Management System, 2012; 16(2): 29-40. doi: 10.21608/pserj.2012.114380

Vibration Isolation of A Symmetric Rigid Plate Using Pair Pre-bent Struts with Intermediate Bonded Filler at Each Corner under Static and Dynamic Axial Excitation

Port-Said Engineering Research Journal
Article 3, Volume 16, Issue 2, September 2012, Page 29-40  XML PDF (535.1 K)
Document Type: Original Article
DOI: 10.21608/pserj.2012.114380
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Authors
Ali Elkafrawy1; Anwar Kandil2; Moustafa Helaly3; Abu-Bakr Omar4
1Port-Said University Department of Production Engineering
2Professor, Production Engineering and Mechanical Design Department, Faculty of Engineering, Port Said University, Port Said, Egypt
3Alexandria University Department of Production Engineering Faculty of Engineering
4Teacher, Mechanical Department, Faculty of Engineering, Suez Canal University, Ismailia, Egypt
Abstract
The objective of this paper is to study the influence of vibration isolators in the form of post-buckled elastic struts. A mathematical model is introduced consisting of pre-bent post-buckled pairs strut with intermediate bonded filler acting as vibration isolators supporting a symmetric rigid plate. The model is subject to axial harmonic excitation at the base, and allowed to displace laterally with respect to axial center line of plate. The displacement transmissibility is the governing parameter of the isolator's effectiveness. The transmissibility is calculated over a wide range of frequencies and plotted in form of design charts. These plots showed the ranges of frequencies, at which isolation can be maintained. The system resonance frequencies can be easily depicted from design graphs. The present study reveals that at resonance frequencies the most effective transmissibility is well below unity. Vibration characteristics are determined under specific frequencies such that the physical behavior of the system can be thoroughly analyzed. All variables used are normalized, such that the results aren’t dependent on any material or geometric property, such as the modulus of elasticity of the material, section modulus of the used profile, or the length of the strut. In this way, the obtained results can be applied over a wide range of elastic materials, regardless of the type of material or section properties.
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