Modeling and analysis of transient temperature field in finite thickness plate under symmetrically located moving heat sources

Xiong, Chao; Ma, Bin; Li, Heyan; Zhang, Fenglian; Wang, Yusen

doi:10.1177/1687814015619554

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…The ATC related to weather conditions including altitude, ozone, water vapor, smoke, and dust, influences the direct solar radiation intensity. 21,38 The SRA reflects the absorption degree of solar radiation by the structure, and the type of concrete, the color of the concrete surfaces, and the roughness of concrete surfaces also lead to different SRA in different geographical regions. 6,39 Thus, the influence of environmental factors on the temperature distributions of the concrete box girders considering regional influences deserve to be researched.…”

Section: Influences Of Environmental Parameters Considering Regional ...mentioning

confidence: 99%

Time-varying non-uniform temperature distributions in concrete box girders caused by solar radiation in various regions in China

Sheng

Shi

Zheng

et al. 2022

Advances in Mechanical Engineering

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Non-uniform temperature distributions of concrete box girders are induced by solar radiation depending on the structural shapes and shadows cast on them. Using a real-time shadow-selection algorithm and finite element method, the thermodynamic analysis of concrete box girders is carried out to simulate their time-varying temperature distributions. The theoretical results of the finite element model (FEM) are verified by measured data. Based on this, a series of FEMs of concrete box girders are established considering regional influences, and the temperature gradients of concrete box girders in different climatic zones in China are studied. The most unfavorable temperature gradient of concrete box girders in China is obtained, and it is important for design and not only for health monitoring. Moreover, comparing the temperature gradient modes in the specifications of various countries, the temperature gradient of concrete box girders in the China Highway Bridges Design Code is conservative for structural design. Furthermore, the influences on structural temperature distributions of varying environmental factors induced by regional influences are explored, including atmospheric transparency coefficient (ATC) and solar radiation absorptivity (SRA).

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Section: Influences Of Environmental Parameters Considering Regional ...mentioning

confidence: 99%

Time-varying non-uniform temperature distributions in concrete box girders caused by solar radiation in various regions in China

Sheng

Shi

Zheng

et al. 2022

Advances in Mechanical Engineering

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“…30 By using ABAQUS software for a CRTS I double-block ballastless track, the geometric structure, physical, and loading conditions were simulated. 31 The track slab has a thickness of 260 mm and a width of 2800 mm; 32 the support layer is 300 mm thick and 3400 mm wide. The wheelset was simplified into an analytical rigid body with a mass of 1250 kg.…”

Section: Temperature Load and Impact Model Of A Double-block Ballastless Track Structurementioning

confidence: 99%

Dynamic response of CRTS I double-block ballastless track under three-dimensional temperature and falling-shaft impact loadings

Zeng

Fushan

et al. 2021

Advances in Mechanical Engineering

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The CRTS I double-block ballastless track under the coupling effect of temperature and falling-shaft impact is more adaptable to actual operation. However, domestic and foreign research has only focused on either temperature or train loadings. In this study, the finite-element method was used to analyze the dynamic response of the double-block ballastless track structure. The results suggests that the displacement and acceleration characteristics of the ballastless track structure under different working conditions change significantly than no temperature gradient. Moreover, the vibration responses at the different working conditions under the impact excitation of a dropping wheelset show that. The findings of this study revealed that temperature has significant impact on falling-shaft which cannot be ignored, consequently it, paper provides referential information for the design, construction, operation and maintenance of the CRTS I double-block ballastless track structure under with large temperature difference.

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“…In Figure 3, only one friction pair is illustrated to detail the slipping condition in CL and it is assumed that other friction pairs have same working condition. 18 Naturally, the generated heat transfers between the plates and the oil. Based on equation (3), the heat state equation for the element CL can be expressed as follows…”

Section: Temperature Variation Of the Clutch Systemmentioning

confidence: 99%

Creeping control strategy for Direct Shift Gearbox based on the investigation of temperature variation of the wet multi-plate clutch

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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Proposing an appropriate control strategy is an effective and practical way to address the overheat problems of the wet multi-plate clutches in Direct Shift Gearbox under the long-time creeping condition. To do so, the temperature variation of the wet multi-plate clutch is investigated first by establishing a thermal resistance model for the gearbox cooling system. To calculate the generated heat flux and predict the clutch temperature precisely, the friction torque model is optimized by introducing an improved friction coefficient, which is related to the pressure, the relative speed and the temperature, before being demonstrated experimentally using a full scale powertrain test. After that, the verified heat transfer model and the reasonable friction torque model are employed by the vehicle powertrain model to construct a comprehensive co-simulation model for the Direct Shift Gearbox vehicle, capable of simulating the dynamic responses and predicting the temperature variations of two clutches. A creeping control strategy is then proposed and, to evaluate the vehicle performance, the safety temperature (250°C) is particularly adopted as an important metric. From the variations in torque and speed obtained from the simulation results, the vehicle can track the desired speed (1.5 km/h) satisfactorily, with only 3% fluctuation, and have good longitudinal dynamic performance (8.5 m/s3). But above all, during the entire 174 s creeping process, the temperature of two clutches is always under the safety value (250°C), which demonstrates the effectiveness of the proposed control strategy in avoiding the thermal failures of clutches.

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Modeling and analysis of transient temperature field in finite thickness plate under symmetrically located moving heat sources

Cited by 9 publications

References 18 publications

Time-varying non-uniform temperature distributions in concrete box girders caused by solar radiation in various regions in China

Time-varying non-uniform temperature distributions in concrete box girders caused by solar radiation in various regions in China

Dynamic response of CRTS I double-block ballastless track under three-dimensional temperature and falling-shaft impact loadings

Creeping control strategy for Direct Shift Gearbox based on the investigation of temperature variation of the wet multi-plate clutch

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