A co-simulation method for the train-track-bridge interaction analysis under earthquake using Simpack and OpenSees

Tang, Jian-Yuan; Guo, Wei; Wang, Yang; Li, Junlong; Zeng, Zhe-feng

doi:10.1007/s11771-022-5122-6

Cited by 10 publications

(2 citation statements)

References 22 publications

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“…-Temperature rise of the cooling water in the condenser, °C; -Difference in the heat transfer end of the condenser, °C. (2) For back-pressure turbines, the discharge pressure is designed according to the needs of the actual situation, with reference to the commonly used discharge pressure values for back-pressure turbines in China [5][6].…”

Section: Final Steam Parametersmentioning

confidence: 99%

Modelling Analysis of a Saturated Steam Turbine with Respect to Multi-body Dynamics

2022

KME

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In petroleum, chemical, light industry, metallurgy, building materials, paper making, textile and other industrial enterprises there is a large amount of low-grade energy a low-pressure saturated steam, these low-grade energy except for a small amount of recycling, a large number of emptying, resulting in a great waste of energy. The aim of this paper is to investigate the modelling analysis of saturated steam turbines with respect to multi-body dynamics. The paper systematically analyses methods and key technologies for the recovery and utilisation of low-value thermal energy, as well as the design, development and optimisation of specific industrial low-pressure saturated steam turbines to improve the performance of waste heat recovery systems. Energy conservation and reduction of consumption are of great importance to industrial companies. to reduce the risk of steam-induced blade corrosion. A small 100 kW waste heat recovery turbine was designed for liquid saturated steam at a flow rate of 1 tonne per hour and a pressure of 0.8 MPa. The unit is characterised by its high efficiency and small structural dimensions. This feature is intended to solve the problem of low efficiency and difficulties in recovering waste heat due to the uneven distribution of the heat source and its small size. The application site can be a small factory or a house. This paper focuses on the structural design and calibration of key turbine components, such as moving blades, impellers and cylinders. The maximum error of the hybrid model in this paper is experimentally proven to be within 3%, indicating that the hybrid model of the turbine body is consistent with the actual operating conditions and meets the engineering accuracy requirements.

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Section: Final Steam Parametersmentioning

confidence: 99%

Modelling Analysis of a Saturated Steam Turbine with Respect to Multi-body Dynamics

2022

KME

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“…At the same time, the mathematical derivation of the harmonic current generated is carried out. In addition, the analysis shows that different charging modes will cause different levels of harmonic pollution to the power grid [4].…”

Section: Introductionmentioning

confidence: 99%

Improvement and Implementation of Electric Vehicle Charging Optimization Strategy Based on Multi-body Dynamics

2022

KME

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The charging time and location of electric vehicles have certain randomness and uncertainty. The disordered charging will bring new challenges to the power grid, affect the stability of the power system, and reduce the power quality. Therefore, it is particularly important to study the charging optimization strategy of electric vehicles. The purpose of this paper is to study the improvement and realization of electric vehicle charging optimization strategy which depends on multi-body dynamics. This paper establishes a charging load model for electric vehicles. Combined with the vehicle travel statistics released by the Transport Development Research Institute, the charge demand of electric vehicles is simulated using the Monte Carlo method. It is found that it is not conducive to the economic and stable operation of the distribution network, and the higher the share of electric vehicles, the more significant the adverse impact. Genetic algorithm is used to solve the optimization model. The peak and valley periods are subdivided by the membership function. The response model of electric vehicle is established through price elasticity matrix, and the optimized peak valley time of use price is finally solved by using genetic algorithm. Finally, the multi-body dynamics model is used for simulation.

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Validation of a scaled dynamic test system for simulating a high‐speed train passing bridges under seismic excitation

Zeng,

Guo,

Jiang

et al. 2024

Earthq Engng Struct Dyn

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This study presents the validation of a dynamic test system to simulate a high‐speed train passing bridges under seismic excitation. The system comprises scaled models of a CRH380A high‐speed train and an 11‐span simply supported bridge on a shake table array. This innovative apparatus combines seismic loading with the moving train load to replicate train‐track‐bridge interaction (TTBI) during earthquakes. It allows investigation of various train speeds and seismic excitations, providing invaluable insights into TTBI. First, the detailed similarity design principle based on the equations of motion was discussed, and its applicability to the wheel‐rail contact relationship was verified. Then, the dynamic characteristics of the scaled model were identified, and the impact of the error between the scaled model and the theoretical model on the TTBI response was assessed. Furthermore, the comparison of the dynamic test model and the numerical simulation in acceleration responses validated the accuracy of the rigid‐flexible coupling model method for the actual TTBI system. Test cases without external excitation, with simple harmonic excitation and with seismic excitation were conducted on the dynamic test system. Results showed that the influence of track irregularity and running speed on train response aligns with the classical train‐bridge interaction theory. The successful implementation of this test system marks a significant advance in understanding TTBI mechanics and has significant implications for seismic safety enhancement of railway infrastructure.

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A co-simulation method for the train-track-bridge interaction analysis under earthquake using Simpack and OpenSees

Cited by 10 publications

References 22 publications

Modelling Analysis of a Saturated Steam Turbine with Respect to Multi-body Dynamics

Modelling Analysis of a Saturated Steam Turbine with Respect to Multi-body Dynamics

Improvement and Implementation of Electric Vehicle Charging Optimization Strategy Based on Multi-body Dynamics

Validation of a scaled dynamic test system for simulating a high‐speed train passing bridges under seismic excitation

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