| Universe Expansion-Contraction Vibratory Model |
| کد مقاله : 1110-ISAV |
| نویسندگان: |
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Hassan Sayyaadi *1، درین جواهرنشان2 1دانشکده مهندسی مکانیک، دانشگاه صنعتی شریف 2دانشکده مهندسی مکانیک، دانشگاه صنعتی شریف، تهران، ایران |
| چکیده مقاله: |
| One of the recent theories in physics and cosmology is the subject of dark energy and the expansion of the universe, which according to the findings of radio telescopes and the Hub-ble telescope, some evidence has been provided and some believe the universe continues expanding. In contrast, hypotheses can be made that the universe behaves oscillating (ex-pansion-contraction). This article assumes that the universe follows the second theory, meaning that there is a contraction that leads to collapse and another big bang after the ex-pansion. The universe is considered a circular plate that vibrates radially. By writing New-ton’s second law on an element of this round plate and applying boundary conditions that are close to the reality of the universe, an equation is obtained for natural frequency. Even-tually, the first period of vibration is derived using the Hubble constant’s last measured value in one of the obtained formulas. A vibratory model is derived here in this article and the results are discussed appropriately. |
| کلیدواژه ها: |
| Universe; Expansion; Contraction; Vibratory Model; Natural Frequency کیهان، انبساط، انقباظ، مدل ارتعاشی، فرکانس طبیعی |
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