Uncertainty and sensitivity analysis for train-ballasted track–bridge system

Xin, Lifeng; Li, Xiaozhen; Zhu, Yan; Liu, Ming

doi:10.1080/00423114.2019.1584678

Cited by 32 publications

(10 citation statements)

References 31 publications

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“…Xiao et al (2019b) explored the effects of track irregularities on the random responses of the train-bridge system. With regard to the sensitivity analysis, Xin et al (2020b) applied the probability density evolution method to quantify the response variabilities of train-bridge random systems subjected to uncertainties, and then identified the sensitive input factors and ranked them in the order of importance based on the extended Fourier Amplitude Sensitivity Testing. For the reliability assessment, Li et al (2019k) provided the temporal reliability of the train-bridge coupled systems under a full probability distribution of track irregularities.…”

Section: Vehicle-bridge Random Dynamicsmentioning

confidence: 99%

Review of annual progress of bridge engineering in 2019

Zhao

Yuan

Wei

et al. 2020

ABEN

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Bridge construction is one of the cores of traffic infrastructure construction. To better develop relevant bridge science, this paper introduces the main research progress in China and abroad in 2019 from 13 aspects, including concrete bridges and the high-performance materials, the latest research on steel-concrete composite girders, advances in box girder and cable-supported bridge analysis theories, advance in steel bridges, the theory of bridge evaluation and reinforcement, bridge model tests and new testing techniques, steel bridge fatigue, wind resistance of bridges, vehicle-bridge interactions, progress in seismic design of bridges, bridge hydrodynamics, bridge informatization and intelligent bridge and prefabricated concrete bridge structures.

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Section: Vehicle-bridge Random Dynamicsmentioning

confidence: 99%

Review of annual progress of bridge engineering in 2019

Zhao

Yuan

Wei

et al. 2020

ABEN

Self Cite

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“…It is because that, in light of different dynamic indices, the sensitive factors are rather different. For example, the magnitude of VACB is mainly affected by vertical profile irregularities, but LACB is significantly influenced by alignment irregularities; although WRLF is one of the sources for LACB, the WRLF is rather sensitive to the short-wavelength irregularities while LACB is sensitive to the long-wavelength irregularities [44]. According to the theory of random process, this indicates that there are no obvious or only weak probabilistic correlations among them, and correspondingly, they can be considered as mutually independent processes.…”

Section: Correlation Analysismentioning

confidence: 99%

A Probabilistic Assessment Model for Train‐Bridge Systems: Special Attention on Track Irregularities

Liu

Xin

et al. 2021

Shock and Vibration

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In this paper, a probabilistic model devoted to investigating the dynamic behaviors of train-bridge systems subjected to random track irregularities is presented, in which a train-ballasted track-bridge coupled model with nonlinear wheel-rail contacts is introduced, and then a new approach for simulating a random field of track irregularities is developed; moreover, the probability density evolution method is used to describe the probability transmission from excitation inputs to response outputs; finally, extended analysis from three aspects, that is, stochastic analysis, reliability analysis, and correlation analysis, are conducted on the evaluation and application of the proposed model. Besides, compared to the Monte Carlo method, the high efficiency and the accuracy of this proposed model are validated. Numerical studies show that the ergodic properties of track irregularities on spectra, amplitudes, wavelengths, and phases should be taken into account in stochastic analysis of train-bridge interactions. Since the main contributive factors concerning different dynamic indices are rather different, different failure modes possess no obvious or only weak correlations from the probabilistic perspective, and the first-order reliability theory is suitable in achieving the system reliability.

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“…In fact, most of the HEV/EV powertrain models are nonlinear which raises the following question, "What would be the consequences if the SA results are incorrect?" On the other hand, global sensitivity analyses (GSA) [35][36][37][38][39][40][41][42][43][44][45], which avoids the aforementioned shortcomings, are only employed by a minority of designers. From the literature published on SA-focused studies for different HEV [46][47][48] and EV [50][51][52] powertrain topologies in both commercial [51][52][53] and passenger [54][55] vehicles, a remarkable lack of the availability of data can be seen.…”

Section: Introductionmentioning

confidence: 99%

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Asef

Lapthorn

2021

IEEE Access

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A robust design in electrified powertrains substantially helps to enhance the vehicle's overall efficiency. Robustness analyses come with complexity and computational costs at the vehicle level. The use of sensitivity analysis (SA) methods in the design phase has gained popularity in recent years to improve the performance of road vehicles while optimizing the resources, reducing the costs, and shortening the development time. Designers have started to utilize the SA methods to explore: i) how the component and vehicle level design options affect the main outputs i.e. energy efficiency and energy consumption; ii) observing sub-dependent parameters, which might be influenced by the variation of the targeted controllable (i.e. magnet thickness) and uncontrollable (i.e. magnet temperature) variables, in nonlinear dynamic systems; and iii) evaluating the interactions, of both dependent, and sub-dependent controllable/uncontrollable variables, under transient conditions. Hence the aim of this study is to succinctly review recent utilization of SA methods in the design of AC electric machines (EM)s used in vehicle powertrains, to evaluate and discuss the findings presented in recent research papers while summarizing the current state of knowledge. By systematically reviewing the literature on applied SAs in electrified powertrains, we offer a bibliometric analysis of the trends of application-oriented SA studies in the last and next decades. Finally, a numericalbased case study on a third-generation TOYOTA Prius EM will be given, to verify the SA-related findings of this paper, alongside future works recommendations.INDEX TERMS Automotive engineering, AC machines, electric vehicles, robustness, sensitivity analysis, permanent magnet machines, time series analysis, statistics.

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Uncertainty and sensitivity analysis for train-ballasted track–bridge system

Cited by 32 publications

References 31 publications

Review of annual progress of bridge engineering in 2019

Review of annual progress of bridge engineering in 2019

A Probabilistic Assessment Model for Train‐Bridge Systems: Special Attention on Track Irregularities

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

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