Numerical and Experimental Study on Railway Impact Energy Absorption Using Tube External Inversion Mechanism at Real Scale

Puja, Ign Wiratmaja; Khairullah, A.; Kariem, Muhammad Agus; Saputro, Andy

doi:10.4028/www.scientific.net/kem.306-308.315

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…On the other hand, if it is assumed that the deformations caused by the existence of the waves do not contain the slip and rotation, take the following form 7,9 :

The waves determined by are called longitudinal waves. The speed of propagation of longitudinal wave in an elastic environment is determined by the formula:

…”

Section: Theoretical Analysis Of Wave Propagation In Elastic Solidsmentioning

confidence: 99%

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Experimental Testing of Impact of Railway Wagons

et al. 2012

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This article presents a methodology for the experimental testing of impact of the wagons with a special attention on the identiﬁcation of wave phenomena and inﬂuence of sampling frequency on accuracy of the measured data. The impact force, affecting the buffers of Hccrrss wagon, has been captured at different sampling frequencies. The experimental results were compared to the theoretical ones obtained by the numerical simulation of two impact wagons. The wagons are modeled as two homogeneous elastic rods. The output results of such simple model were speed and time of wave propagation through the supporting structure of the tested wagon. They allow identifying and explaining the wave phenomena in results obtained by the experimental testing that must be carried out in process of certifying the wagons in accordance to the international regulations. In order to maximize the accuracy of the measured data, it is recommended to perform the experimental measurement at as high as possible sampling frequency. This methodology ensured a reliable measurement of the impact force on the buffers and identifying the wave phenomena generated through the subjected wagon.

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“…On the other hand, if it is assumed that the deformations caused by the existence of the waves do not contain the slip and rotation, take the following form 7,9 :

The waves determined by are called longitudinal waves. The speed of propagation of longitudinal wave in an elastic environment is determined by the formula:

…”

Section: Theoretical Analysis Of Wave Propagation In Elastic Solidsmentioning

confidence: 99%

“…For instance, basic theory of impact of two rigid or elastic bodies is presented in Refs. 8–10 . Furthermore, Versinskiy et al 11 deﬁned the equations for calculations of the forces during impact of the wagons.…”

Section: Introductionmentioning

confidence: 99%

Experimental Testing of Impact of Railway Wagons

et al. 2012

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“…In 2006, the Remaining Strength analysis was conducted for Corroded Pipeline with Complex Shape Defects under Combined Loading [1]. Additionally, several studies have been conducted to improve the integrity of pipes and other machine components [2][3][4] [5][6][7] [8]. Regarding the scaling phenomena, an investigation for the mechanism of scale formation and corrosion based on the pH of geothermal fluids in 2020 using the Pourbaix-Lindal and Rayznar index diagram approach that correlated with the velocity profile of geothermal [9].…”

Section: Introductionmentioning

confidence: 99%

Inspection Based Corrosion Rate Mapping for Remaining Strength and Remaining Life of Two-Phase Geothermal Steel Piping

Wiratmaja Puja,

Thasril,

Meliala

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Geothermal as green energy has many advantages for power generation due to cleanness, zero waste, and renewable. However, during the operational period, corrosion and scaling in two-phase geothermal steel piping are two main challenges that can cause leaks, reduce flow performance, and reduce safety. Therefore, the two-phase geothermal steel piping remaining strength and life analysis are conducted to manage its integrity. This paper presents a case study on the corrosion rate mapping, excessive corrosion, and scaling for a two-phase flow line in Well Pad B, one of the geothermal production facilities in Unit 1 Dieng, PT Geo Dipa Energi. The data used for this assessment refer to the results of the wall thickness inspection; meanwhile, the data used for scaling and corrosion analysis refer to field observation results. The results of the remaining strength calculation, using both ASME B31G Original and Modified methods, indicate that the remaining strength of all tested points was deemed acceptable in 2020. The remaining life calculation, based on API 579, reveals that the longest remaining life is 9.08 years and the shortest is 0.83 years in the long-term scenario. In the short-term scenario, the longest remaining life is 57.29 years and the shortest is 11.01 years. The corrosion rate is classified as Class I, based on the total key species, with a predictive corrosion rate value > 1.3 mm/year or 51.1 mpy (poor level). In the long-term scenario, the highest corrosion rate recorded is 258.7 mpy (unacceptable level), while the lowest is 39 mpy (fair level). In the short-term scenario, the highest corrosion rate observed is 23 mpy (fair level), and the lowest is 9 mpy (good level). Furthermore, based on the calculation of the Ryznar Stability Index, the fluid has the potential to generate heavy scale, with an RSI value of 4.1.

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“…In some research papers, theoretical aspects of collision [5,6] have already been analyzed. Also, the equations for the determination of forces during the process of impact have been defined [7].…”

Section: Introductionmentioning

confidence: 99%

Determination of dynamic sizes during the process of impact of railway wagons

2011

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The objective of research in this paper refers to the theoretical and experimental determination of dynamic sizes that occur during the process of impact of railway wagons. At the process of wagons impact as well as at the time of changes of movement regime (starting, stopping, and braking), the longitudinal forces that significantly affect the stress-deformational state of the supporting wagon structure occur. In the process of developing and designing new types of wagons and in the process of identifying the behavior of existing types of wagons, it is necessary to know the values of the most important dynamic sizes that occur during the process of impact. In this paper, a method for determining these sizes is formed by using the theoretical models of impact of wagons. Results of numerical simulation of impact are compared with the results of experimental tests, which were conducted according to international regulations. Research has shown that the results of numerical simulations coincide with the results of experimental tests, with certain exceptions. It is concluded that theoretical model can be used in determining the most important dynamic sizes that occur during the process of wagons impact.

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Numerical and Experimental Study on Railway Impact Energy Absorption Using Tube External Inversion Mechanism at Real Scale

Cited by 3 publications

References 9 publications

Experimental Testing of Impact of Railway Wagons

Experimental Testing of Impact of Railway Wagons

Inspection Based Corrosion Rate Mapping for Remaining Strength and Remaining Life of Two-Phase Geothermal Steel Piping

Determination of dynamic sizes during the process of impact of railway wagons

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