Penentuan Frekuensi Pribadi Balok Kantilever Pada Dimensi Yang Berbeda

Endriatno, Nanang

doi:10.33772/djitm.v11i2.11689

Cited by 3 publications

(3 citation statements)

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“…Khusus untuk mencari hubungan ukuran model terhadap natural frequency struktur, beberapa penelitian telah dipublikasikan di berbagai jurnal. Endriatno [11] mencoba memvariasikan ukuran model balok sederhana dan menentukan natural frequencynya. Meskipun demikian, variasi ukuran model balok tidak dalam skala tertentu, sehingga hasilnya belum dapat digunakan untuk menentukan pengaruh faktor skala terhadap natural frequency struktur balok.…”

Section: Pendahuluanunclassified

Effect of a Scaled Cantilever Beam on Natural Frequency

Malta,

Gunawan,

Son

2023

JRM

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This paper deals with the scaling factor's effect on the cantilever beam's natural frequency. Scaling a prototype dimension will make it easier to manufacture and test the dynamic characteristics of structures with enormous sizes. Natural frequency is one of the essential parameters of the vibration characteristics of the system. The phenomenon that often occurs in vibrating structures is the resonance phenomenon. Resonance is a system state in which an abnormally large vibration is generated in response to an external stimulus, happening when the frequency of the disturbance is equal to, or nearly identical to, the natural frequency of the system. This research investigates the scale factor on natural frequency using the analytical method using Euler-Bernoulli beam theory, the MSC Nastran/Patran software, and experimental testing using an impact hammer on a cantilever beam. The three methods were applied to beams with four scaling variations: 1:1, 1:2.04, 1:2.85, and 1:3.48. Based on the results, the natural frequencies increase by the size scale reduction value in the modeling. The natural frequency value in the actual structure has a value equivalent to 1/S of the natural frequency value of the scale, whereas S is defined as the downgrade scale value. This result follows the Similitude theory.

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Section: Pendahuluanunclassified

Effect of a Scaled Cantilever Beam on Natural Frequency

Malta,

Gunawan,

Son

2023

JRM

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“…Other studies have examined the characteristics of composite materials where the structure of the material and the volume fraction of the material affect its mechanical properties [8], [9]. Meanwhile, research on cantilever beams has been investigated including the analysis of the effect of composite structures on fiber-reinforced cantilever beams on vibration characteristics [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Vibration Responses of Fiberglass Reinforced Plastic

Endriatno¹

2021

int. jour. eng. com. sci

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The purpose of this study is to analyze the vibration displacement on fiberglass reinforced plastic beams with variations a number of fibers in the resin matrix. Composite beams was made of fiberglass and polyester resin matrix with a number of fiberglass: 0, 24, and 48. Composite beams was manufactured by hand lay-up method with the unidirectional fiber orientation. The composite beams used have the dimension of length: 500 mm, height: 20 mm, and width: 20 mm. During the experimental test, the beam was vibrated using an exciter motor which was placed at the end of the cantilever support then using a vibration meter, the vibration displacement data (mm) was measured by placing the vibration transducer postions : 50 mm, 250 mm, and 450 mm from the cantilever support. During the vibration test, the vibration displacement data on the vibration meter screen were recorded using a camera recorder and the data was taken 6 times at each of measurement points. The experimental and analysis results show that the value of vibration displacement (mm) decreases when the fiberglass is added to the composite beam, or in other words, the addition of fiberglass provides an increase in the ability of the beam to withstand vibrations. The maximum vibration displacement value on composites with 0 fiberglass: 0.641 mm, then the vibration displacement decreased in composites with 24 fiberglass: 0.506 mm and the lowest displacement value for the composites with 48 fiberglass: 0.395 mm. Whereas for 3 measurement points at positions 5 cm, 25 cm, and 45 cm along the beam for three kind of the composites, the maximum value of vibration displacement value was obtained at the end of beam composites or at 45 cm from cantilever support: 0.735 mm on composite beam with 0 fiberglass and minimum at position 5 cm near the cantilever support with the value of vibration displacement: 0.323 mm on composite beam with 48 fiberglass.

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“…Many undesirable vibrations occur in structures or machines and lead to discomforts and damaging to the materials [2], [3], [4], [5]. Other studies examine the difference of vibration frequency at a certain distance from the cantilever beams and prove that vibration testing is very important in planning and damage detection in machines or structures [6].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response at Various Points of Aluminum Cantilever Beam

Endriatno

Sudia

Sisworo

et al. 2020

int. jour. eng. com. sci

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The aim of the study was to analyze the dynamic response along an aluminum cantilever beam. The data measured were displacement (mm), velocity (mm / s), and acceleration (m/s2) with 3 variations of the measurement position on the beam. The 6061 series aluminum beam used have length: 80 cm, height: 32 cm, and width: 32 cm. Data were collected experimentally using a vibration meter to measure beam vibrations at the various positions from the cantilever beam at a distance from support: 10 cm, 35 cm, and 60 cm. The results of the analysis showed that the values of the displacement, velocity and acceleration of the object vibrations change when the measuring point was far from the cantilever support. The maximum displacement value is at 60 cm from the support: 0.02 mm, and the lowest is at 10 cm: 0.12 mm. The velocity value also increases, maximum at 60 cm from the support: 38.58 mm/s and the minimum value at 10 cm: 12.30 mm/s. While the acceleration value, the maximum at 60 cm from the support: 91150 mm/s2 and the minimum at 10 cm: 66900 mm/s2.

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Penentuan Frekuensi Pribadi Balok Kantilever Pada Dimensi Yang Berbeda

Cited by 3 publications

References 0 publications

Effect of a Scaled Cantilever Beam on Natural Frequency

Effect of a Scaled Cantilever Beam on Natural Frequency

Experimental Investigation on Vibration Responses of Fiberglass Reinforced Plastic

Dynamic Response at Various Points of Aluminum Cantilever Beam

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