Publication: Sonsuz Metal Plaka Üzerinde Sabit Hızla Giden Isısal Kaynağın Meydana Getirdiği Dalga Paternleri
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Fizik Mühendisliği
Physics Engineering
Physics Engineering
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Fen Bilimleri Enstitüsü
Institute of Science and Technology
Institute of Science and Technology
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Lineer, izotropik elastisite teorisi çerçevesinde sonsuz metal tabaka üzerinde sabit hız ile ilerleyen ısısal kaynağın meydana getirdiği dalga paternleri hesaplandı. Başlangıç koşullarına bağlı olan geçici etkiler ve dalgaların sönümleri ihmal edildi. Eğer ısısal kaynağın gidiş hızı, yüzey dalgalarının hızından küçükse, dispersif bükülme dalgaları meydana gelir. Dalga boyu tabakanın kalınlığından çok büyükse, dispersif bükülme dalgalarının frekansı dalga sayısının karesiyle orantılıdır. Bunun sonucu olarak dalga tepesi, gidiş yönüyle 90 derece açı yapar. Bu sonuç, yukardaki şartların getirdiği kısıtlamalar dahilinde ısısal kaynağın gidiş hızından bağımsızdır.
Within the frame of linear, isotropic elasticity theory the wave pattern produced by a heat source moving with constant velocity on the top of an infinite plate is computed. The transient effects associated with the initial conditions and the damping of the waves are neglected. If the travel speed of the heat source is smaller than the velocity of the surface waves, the dispersive flexural waves will be excited. The frequency of these waves is proportional to the square of the wave number if the wavelength is much larger than the thickness of the sheet. In this limiting case it is found that the crest of the waves makes 900 degrees with the travel direction and this result is independent of the travel speed as long as the parabolic approximation remains valid for the dispersion relation of flexural waves.
Within the frame of linear, isotropic elasticity theory the wave pattern produced by a heat source moving with constant velocity on the top of an infinite plate is computed. The transient effects associated with the initial conditions and the damping of the waves are neglected. If the travel speed of the heat source is smaller than the velocity of the surface waves, the dispersive flexural waves will be excited. The frequency of these waves is proportional to the square of the wave number if the wavelength is much larger than the thickness of the sheet. In this limiting case it is found that the crest of the waves makes 900 degrees with the travel direction and this result is independent of the travel speed as long as the parabolic approximation remains valid for the dispersion relation of flexural waves.
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Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2002
Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2002
Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2002
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İTÜ theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.
İTÜ theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.
Keywords
Noktasal sıcaklık kaynak, Bükülme dalgaları, Dalga paterni, Point Heat Source, Flexural Waves, Wave Pattern
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