Journals / Journal of Scientific Reports-B / 2026 / Issue: 001

INVESTIGATION OF NATURAL FREQUENCY CHANGE DEPENDING ON THE DIFFERENT TEST TEMPERATURES IN PASSENGER CAR LIGHTING ELEMENTS

BİR BİNEK ARAÇ AYDINLATMA ELEMANINDA DOĞAL FREKANSLARIN FARKLI TEST SICAKLIĞINA BAĞLI DEĞİŞİMİNİN İNCELENMESİ

Birhat Sönmezay(Bursa Uludağ Üniversitesi)0000-0002-8432-6192
Erhan Ay(Bursa Uludağ Üniversitesi)0000-0001-9621-6030
Ali Durmuş(Bursa Uludağ Üniversitesi)0000-0003-2487-7344
Sevda Telli Çetin(Bursa Uludağ Üniversitesi)0000-0002-3281-9112
Pages
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Publication Date
2020-06-30
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The correlation between the results of the analysis in comparison with the test results were 11.3% and a maximum of at least 0.26%.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, natural frequency scanning of a passenger vehicle lighting housing made of 40% talc mixed polypropylene (PP TD40) was performed by using electrodynamic shaker.
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Key Findings & Data:Tests were performed at different test temperatures of 23 °C, 70 °C and -10 °C.
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Conclusion & Impact:The correlation between the results of the analysis in comparison with the test results were 11.3% and a maximum of at least 0.26%.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Natural frequency · Passenger vehicle lighting · Modal analysis

Abstract

In this study, natural frequency scanning of a passenger vehicle lighting housing made of 40% talc mixed polypropylene (PP TD40) was performed by using electrodynamic shaker. Tests were performed at different test temperatures of 23 °C, 70 °C and -10 °C. The time-dependent acceleration graphs of these tests have been converted to frequency-dependent acceleration graphs with the aid of the "Fast Fourier Transformation" method. The natural frequencies of the part and the damping rates at these frequencies were calculated from these graphs using the half power method. The calculated damping rates for each resonance frequency were then entered into the Ansys software and the results were compared. The correlation between the results of the analysis in comparison with the test results were 11.3% and a maximum of at least 0.26%.

Özet

Bu çalışmada, %40 talk katkılı polipropilenden (PP TD40) imal edilmiş bir binek araç aydınlatma elemanını gövdesinin elektrodinamik sarsıcı kullanılarak doğal frekans taraması yapılmıştır. Testler 23 °C, 70 °C ve -10 °C farklı test sıcaklıklarında gerçekleştirilmiştir. Bu testlerin çıktısı olan zamana bağlı ivme grafikleri “Hızlı Fourier Dönüşümü” yöntemi yardımı ile frekansa bağlı ivme grafiklerine dönüştürülmüştür. Yarım güç metodu kullanılarak bu grafiklerden gövdenin doğal frekansları ve bu frekanslardaki sönüm oranları hesaplanmıştır. Ardından hesaplanan sönüm oranları Ansys yazılımına girilerek sonuçlar karşılaştırılmıştır. Karşılaştırma sonucunda test ile analiz sonuçları arasında korelasyon en fazla %11,3 ve en az %0,26 olmuştur.

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Cite This Article

Sönmezay, B., Ay, E., Durmuş, A., Çetin, S. T. (2020). INVESTIGATION OF NATURAL FREQUENCY CHANGE DEPENDING ON THE DIFFERENT TEST TEMPERATURES IN PASSENGER CAR LIGHTING ELEMENTS. Journal of Scientific Reports-B, Issue: 001. https://ajindex.com/articles/1619127

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