Effect Of DVA Installation on Vibration Response of Ambulance Stretcher According to Iso 2631 Comfort Standard

Pamungkas, Raditya Hendra (2025) Effect Of DVA Installation on Vibration Response of Ambulance Stretcher According to Iso 2631 Comfort Standard. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Getaran adalah gerakan bolak-balik yang disebabkan oleh gaya luar yang merupakan bagian yang tidak dapat dipisahkan dalam kehidupan sehari-hari. Getaran dapat memiliki dampak negatif maupun positif, tergantung pada cara penanganannya. Misalnya, dalam ambulans, getaran berlebih dapat dianggap sebagai masalah yang dapat mengganggu kenyamanan pasien dan bahkan dapat mempengaruhi keselamatan selama proses transportasi. Untuk menilai dampak getaran pada tubuh manusia, ISO 2631 menyediakan kerangka kerja yang mempertimbangkan beberapa parameter evaluasi seperti percepatan, frekuensi, dan durasi paparan. Salah satu metode untuk mengurangi getaran berlebihan adalah dengan memasang Dynamic Vibration Absorber (DVA), sistem tambahan yang dipasang langsung pada sistem utama, yang dapat menyerap getaran berlebihan pada frekuensi tertentu. Penelitian ini bertujuan untuk menganalisis dampak pemasangan DVA terhadap respons getaran pada tempat tidur ambulans menggunakan model setengah mobil dinamis dengan 7 derajat kebebasan (DOF), termasuk roda depan, roda belakang, bodi ambulans, tempat tidur, dan DVA. Simulasi dilakukan menggunakan perangkat lunak MATLAB dengan masukan berupa profil jalan sinusoidal dan impuls pada kecepatan 30, 50, dan 70 km/jam. Analisis berfokus pada perpindahan vertikal dan percepatan gerakan melompat dan bergoyang tandu. Hasil penelitian menunjukkan bahwa keberadaan DVA secara signifikan mengurangi nilai puncak dan RMS perpindahan dan percepatan pada gerakan melompat, dengan pengurangan 40%–50% pada input sinusoidal. Dengan input impuls, perubahan juga terlihat pada nilai puncak perpindahan dan percepatan, serta waktu transien. Studi ini menyimpulkan bahwa penggunaan DVA secara efektif meningkatkan isolasi getaran dan mengurangi ketidaknyamanan pasien, menawarkan solusi yang menjanjikan untuk desain suspensi ambulans canggih.
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Vibration is a back-and-forth movement caused by excitation forces that are an integral part of everyday life. It can have both negative and positive effects, depending on how it is addressed. For example, in an ambulance, excessive vibration is considered a problem that can disrupt patient comfort and even affect safety during the transportation process. To assess vibration's impact on the human body, ISO 2631 is a international standard that provides a framework that considers several evaluation parameters such as acceleration, frequency, and exposure duration. One method to reduce excessive vibration is by installing a Dynamic Vibration Absorber (DVA), an additional system mounted directly on the main system, which can absorb excessive vibration at specific frequencies. This research aims to analyse the effect of installing a DVA on vibration response in an ambulance stretcher using a dynamic half-car model with 7 degrees of freedom (DOF), including the front wheels, rear wheels, ambulance body, stretcher, and DVA. Simulations were conducted using MATLAB software with input consisting of sinusoidal road profiles and impulses at speeds of 30, 50, and 70 km/h. The analysis focuses on vertical displacement and acceleration of bouncing and pitching motions of the stretcher. The results of the study show that the presence of DVA significantly reduces the peak and RMS values of displacement and acceleration in bouncing motion, with reductions of 40% - 50% with sinusoidal input. With impulse input, changes are also seen in the peak displacement and acceleration values, as well as in the transient time. This study concludes that the use of DVA effectively improves vibration isolation and reduces patient discomfort, offering a promising solution for the design of advanced ambulance suspensions.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Dynamic Vibration Absorber, Ambulans, ISO 2631, MATLAB, Dynamic Vibration Absorber, Ambulance, ISO 2631, MATLAB
Subjects:	T Technology > T Technology (General) > T57.62 Simulation T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration. T Technology > TE Highway engineering. Roads and pavements > TE7 Transportation--Planning T Technology > TJ Mechanical engineering and machinery T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL152.5 Motor vehicles Driving
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Raditya Hendra Pamungkas
Date Deposited:	31 Jul 2025 03:57
Last Modified:	31 Jul 2025 03:57
URI:	http://repository.its.ac.id/id/eprint/124198

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