Dynamics Study of Straddle-Type Monorail Vehicle With Single-Axle Bogies-Based Full-Scale Rigid-Flexible Coupling Dynamic Model

Zhou, Junchao; Du, Zhiwei; Yang, Zhen; Xu, Zhenbang

doi:10.1109/access.2019.2933991

Cited by 13 publications

(6 citation statements)

References 43 publications

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“…For the performance evaluation of the 4.5-approximation and 2-approximation algorithms, all the instances are generated by a random algorithm, as in the papers [63][64][65][66][67][68]. In the process of the instances generation, five factors affecting the solution of the problem are determined: the number of jobs, the number of machines, the variation in job sizes, the variation in job processing time, and the variation in machine capacities [69][70][71][72][73][74][75].…”

Section: Experimental Environmentmentioning

confidence: 99%

A Novel Fast Parallel Batch Scheduling Algorithm for Solving the Independent Job Problem

Zhang

Song

et al. 2020

Applied Sciences

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With the rapid economic development, manufacturing enterprises are increasingly using an efficient workshop production scheduling system in an attempt to enhance their competitive position. The classical workshop production scheduling problem is far from the actual production situation, so it is difficult to apply it to production practice. In recent years, the research on machine scheduling has become a hot topic in the fields of manufacturing systems. This paper considers the batch processing machine (BPM) scheduling problem for scheduling independent jobs with arbitrary sizes. A novel fast parallel batch scheduling algorithm is put forward to minimize the makespan in this paper. Each of the machines with different capacities can only handle jobs with sizes less than the capacity of the machine. Multiple jobs can be processed as a batch simultaneously on one machine only if their total size does not exceed the machine capacity. The processing time of a batch is determined by the longest of all the jobs processed in the batch. A novel and fast 4.5-approximation algorithm is developed for the above scheduling problem. For the special case of all the jobs having the same processing times, a simple and fast 2-approximation algorithm is achieved. The experimental results show that fast algorithms further improve the competitive ratio. Compared to the optimal solutions generated by CPLEX, fast algorithms are capable of generating a feasible solution within a very short time. Fast algorithms have less computational costs.

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Section: Experimental Environmentmentioning

confidence: 99%

A Novel Fast Parallel Batch Scheduling Algorithm for Solving the Independent Job Problem

Zhang

Song

et al. 2020

Applied Sciences

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“…Zhuravlev [11] studied the impact self-exciting vibration modes in a linear motor of a monorail car. Zhou et al [12] discussed the influences of vehicle velocity, passenger mass, curve radius, and the number of axles on the relevant dynamic characteristics. Zhou et al [13] conducted a dynamic parameter optimization while focusing on the curve negotiation properties, comfort, and tire eccentric wear of monorail vehicles.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Performance of Straddle Monorail Curved Girder Bridge

Zhou¹,

Zhang²,

Miao³

et al. 2022

Computer Modeling in Engineering &Amp; Sciences

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In this work, a monorail vehicle-bridge coupling (VBC) model capable of accurately considering curve alignment and superelevation is established based on curvilinear moving coordinate system, to study the VBC vibration of straddle monorail curved girder bridge and the relevant factors influencing VBC. While taking Chongqing Jiao Xin line as an example, the VBC program is compiled using Fortran, where the reliability of algorithm and program is verified by the results of Chongqing monorail test. Moreover, the effects of curve radius, vehicle speed, and track irregularity on the corresponding vehicle and bridge vibrations are compared and analyzed. It is observed that the test results of lateral vibration acceleration (LVA) and vertical vibration acceleration (VVA) of track beam, and LVA of vehicle, are consistent with the simulation results. Owing to the track irregularity, vibration of track beam and vehicle increases significantly. Besides, an increase in vehicle speed gradually increases the vibration of track beam and vehicle. For the curve radius (R) ≤ 200 m, lateral and vertical vibrations of the track beam and vehicle decrease significantly with an increasing curve radius. Alternatively, when 200 m < R < 600 m, the lateral vibration of the track beam and vehicle decreases slowly with an increasing curve radius, while the relevant vertical vibration remains stable. Similarly, when R ≥ 600 m, the lateral and vertical vibrations of the track beam and vehicle tend to be stable. Accordingly, the results presented here can provide a strong reference for the design, construction, and safety assessment of existing bridges.

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“…Wang et al 11 explored the effect of the connection stiffness on the vertical and lateral vibration amplitudes of a composite track beam. Based on the finite element method and multibody dynamics, Zhou et al 12 proposed a full-scale coupling model to evaluate the dynamic behaviour of a monorail vehicle. Notably, credible simulation results with LLI were obtained in these works when compared to field tests, although the exact influence of LLI on dynamic systems was not reported.…”

Section: Introductionmentioning

confidence: 99%

“…method and multibody dynamics, Zhou et al 12 proposed a full-scale coupling model to evaluate the dynamic behaviour of a monorail vehicle. Notably, credible simulation results with LLI were obtained in these works when compared to field tests, although the exact influence of LLI on dynamic systems was not reported.…”

mentioning

confidence: 99%

Measurement and analysis of the longitudinal level irregularity of the track beam in monorail tour-transit systems

Guo

Wang

2022

Sci Rep

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Notable effects on the vertical dynamic response of vehicle-bridge systems are introduced by longitudinal level irregularity (LLI). However, in monorail systems, the measured data and associated spectrum of the LLI, i.e., the distribution curve of power spectral density versus wavelength, have not been reported in detail. To address this issue, we propose the inclination correction method (ICM) to measure the LLI in monorail tour-transit systems and further estimate and fit the spectral curves for the first time. The measuring principle of ICM is thoroughly described, and ICM is compared with conventional chord-based methods. In addition, the trend components of the measured LLI are eliminated through an adaptive method preceding spectral estimation to avoid potential errors. Notably, a simulation program is designed, and the results from existing methods are adopted to verify the proposed ICM. Based on an analysis of the results, the accuracy and robustness of ICM are demonstrated, and the applicability and advantages of autoregressive models and the proposed fractional functions in spectral analysis are revealed. Finally, combining qualitative and quantitative calculations, an evaluation approach for the generic spectra of monorail LLI is established.

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Dynamics Study of Straddle-Type Monorail Vehicle With Single-Axle Bogies-Based Full-Scale Rigid-Flexible Coupling Dynamic Model

Cited by 13 publications

References 43 publications

A Novel Fast Parallel Batch Scheduling Algorithm for Solving the Independent Job Problem

A Novel Fast Parallel Batch Scheduling Algorithm for Solving the Independent Job Problem

Dynamic Performance of Straddle Monorail Curved Girder Bridge

Measurement and analysis of the longitudinal level irregularity of the track beam in monorail tour-transit systems

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