Publication: Araç Radyatör Asılışlarının Titreşim Analizi Ve Optimizasyonu
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Otomotiv
Automotive
Automotive
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Fen Bilimleri Enstitüsü
Institute of Science and Technology
Institute of Science and Technology
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Bu çalışmada bir yolcu otobüsünün, şasisine lastik takozlarla bağlı bulunan hava radyatörünün titreşim analizi ve optimizasyonu yapılmıştır. Sorun; hava radyatöründe, maruz kaldığı yüksek titreşim zorlanmaları sonucu kırılmalar meydana gelmesidir. Amaçlanan ise bu titreşim zorlanmalarını uygun karakterli lastik takozlarla düşük seviyelere çekmektir. Tez çalışması kapsamında taşıt yol testinde şasi ve radyatör üzerinden her üç eksende ivme sinyalleri ölçülmüş, şasiden ölçülen ivme sinyalleri ADAMS programında oluşturulan titreşim sisteminin matematiksel modeline girilerek programın hesapladığı hava radyatörü çıkış değerleri hava radyatöründen ölçülen değerlerle her üç eksen yönünde de mukayese edilmiştir. Tireşim analizinde elde edilen bilgilere göre matematiksel modelde lastik takozların yay sabiti ve sönümleme katsayıları değiştirilerek program, iyi bir titreşim izolasyonu elde edilene kadar koşturulmuştur. Sonuç bölümünde hava radyatörü salınımları izin verilen mertebelerde tutacak, aynı zamanda titreşim izolasyonu sağlayacak lastik takozlar için öneriler getirilmiştir.
In this study, it has been worked on the vibration analysis and optimization of a coach’s air-cooler, which is connected to the chassis with elastomeric isolators. The faced problem is that the air-cooler breaks down due to the high-transmitted forces to its body. The aim is that to reduce these transmitted forces by using isolators having proper spring constants and damping coefficients. Three-way acceleration signals have been measured from the air-cooler body and also from the chassis during the vehicle road test. The measured chassis data has been used as an input to the mathematical model of the vibration system, which is made by using ADAMS software. A comparison has been made between the calculated output signals and measured signals from the air-cooler body in each axle direction. According to the information from the vibration analysis, having changing the spring constants and damping coefficients of the isolators, the software has been run until a good vibration isolation has been achieved. In the conclusion chapter recommendations have been made for the isolators, which have proper characteristics for having high vibration isolation efficiency and also for having the air-cooler’s displacements in acceptable limits.
In this study, it has been worked on the vibration analysis and optimization of a coach’s air-cooler, which is connected to the chassis with elastomeric isolators. The faced problem is that the air-cooler breaks down due to the high-transmitted forces to its body. The aim is that to reduce these transmitted forces by using isolators having proper spring constants and damping coefficients. Three-way acceleration signals have been measured from the air-cooler body and also from the chassis during the vehicle road test. The measured chassis data has been used as an input to the mathematical model of the vibration system, which is made by using ADAMS software. A comparison has been made between the calculated output signals and measured signals from the air-cooler body in each axle direction. According to the information from the vibration analysis, having changing the spring constants and damping coefficients of the isolators, the software has been run until a good vibration isolation has been achieved. In the conclusion chapter recommendations have been made for the isolators, which have proper characteristics for having high vibration isolation efficiency and also for having the air-cooler’s displacements in acceptable limits.
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Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2005
Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2005
Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2005
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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
Titreşim izolasyonu, Hava radyatörü, Lastik takoz, Titreşim analizi, Vibration isolation, Air-cooler, Elastomeric Isolators, Vibration Analysis
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