Probability-based service safety life prediction approach of raw and treated turbine blades regarding combined cycle fatigue

Han, Lei; Chen, Cao; Guo, Tongyue; Lu, Cheng; Fei, Chengwei; Zhao, Yongjun; Hu, Yan

doi:10.1016/j.ast.2021.106513

Cited by 41 publications

(12 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lots of scholars have researched the stress distribution characteristics and dynamic response of heavy haul railway tunnel structure under heavy train load [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. But there is still insufficient understanding of the vibration characteristics of substructure of the heavy haul railway tunnel under different axle loads and health conditions.…”

Section: Introductionmentioning

confidence: 99%

Research on Vibration Law of Railway Tunnel Substructure under Different Axle Loads and Health Conditions

Chai

Zhu

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

In this paper, 25-ton and 27-ton axle heavy trucks are used to carry out moving loading and dynamic real vehicle test on the cracked section, the intact section, and the repaired section of a railway tunnel foundation to test the dynamic performance of the tunnel basement structure with the change of axle loads and health conditions. By analyzing the influence law of dynamic response and fatigue life of heavy haul train under different basement conditions (intact, damaged, and repaired), the adaptability of railway tunnel equipment to freight trucks axle load is clarified. The results show that (1) the intact section of the tunnel can meet the normal operation of 25-ton and 27-ton axle load freight trains in good condition. (2) The normal operation of 25-ton and 27-ton axle load freight trucks is seriously affected by the cracked section of the tunnel. When the cracks in the tunnel basement are gradually hollowed out by groundwater, serious traffic accidents such as vehicle shaking and derailment are likely to occur. (3) The repaired section of the tunnel can meet the normal operation of 25-ton and 27-ton axle load freight trains after adopting the integrated comprehensive treatment of “Anchor-Injection-Drainage”. The research results will have reference significance for the condition assessment and disease treatment of the basement structure of the heavy haul railway tunnel.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on Vibration Law of Railway Tunnel Substructure under Different Axle Loads and Health Conditions

Chai

Zhu

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…However, these methods do not consider the uncertainty and discreteness of natural rock mass and geological conditions. e probabilistic method was commonly used to handle the uncertainty in engineering systems and test data [10][11][12][13][14][15][16]. At the same time, the interaction analysis between rock and support has also made significant progress [17].…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Design and Optimization for Tunnels considering Measuring Uncertainties

Jia

Zhao

Zhu

2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Uncertainty is an essential property of rock mechanics and engineering, which is of great significance to excavation, design, and control of rock engineering. In this study, an innovative framework of the reliability-based design was developed for the rock tunnel under uncertainty. The convergence-confinement method is used to characterize the interaction mechanism between the support structure and surrounding rock mass. Artificial bee colony (ABC) was adopted to solve the optimization problem in the reliability-based design. The probabilistic properties of rock strength and failure envelope were obtained based on the triaxial compression test data using the Bayesian method. The reliability of the tunnel and support structure was evaluated based on the abovementioned probabilistic properties of rock strength using the reliability analysis method. A circular tunnel was used to illustrate the developed framework, and the procedure was presented in detail. The time of rockbolt installed, the thickness of the shotcrete, length of rockbolt, circumferential space, and longitudinal space of rockbolt were determined and met the constraints of reliability index. Results show that the developed framework can consider the uncertainty for support design in the tunnel. It provides a good and promising way to support design considering the uncertainty of test data using the reliability-based design.

show abstract

“…Different from the regular cylindrical shells, the structural traits of stiffened cylindrical shell are closer to the real engineering structure (i.e., armature structure), and thereby the stiffened cylindrical shell can perform more accurately the nonlinear vibration analysis from geometric modeling perspective. Up till now, stiffened cylindrical shells have been widely used in the civil, mechanical, aerospace, and aeronautic engineering fields [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Vibration Analysis for Stiffened Cylindrical Shells Subjected to Electromagnetic Environment

Bai

Song

Zhang

2021

Shock and Vibration

View full text Add to dashboard Cite

The nonlinear vibration behaviors of stiffened cylindrical shells under electromagnetic excitations, transverse excitations, and in-plane excitations are studied for the first time in this paper. Given the first-order shear deformation theory and Hamilton principle, the nonlinear partial differential governing equations of motion are derived with considering the von Karman geometric nonlinearity. By employing the Galerkin discretization procedure, the partial differential equations are diverted to a set of coupled nonlinear ordinary differential equations of motion. Based on the case of 1 : 2 internal resonance and principal resonance-1/2 subharmonic parametric resonance, the multiscale method of perturbation analysis is employed to precisely acquire the four-dimensional nonlinear averaged equations. From the resonant response analysis and nonlinear dynamic simulation, we discovered that the unstable regions of stiffened cylindrical shells can be narrowed by decreasing the external excitation or increasing the magnetic intensity, and their working frequency range can be expanded by reducing the in-plane excitation. Moreover, the different nonlinear dynamic responses of the stiffened cylindrical shell are acquired by controlling stiffener number, stiffener size, and aspect ratio. The presented approach in this paper can provide an eﬃcient analytical framework for nonlinear dynamics theories of stiffened cylindrical shells and will shed light on complex structure design in vibration test engineering.

show abstract

Probability-based service safety life prediction approach of raw and treated turbine blades regarding combined cycle fatigue

Cited by 41 publications

References 37 publications

Research on Vibration Law of Railway Tunnel Substructure under Different Axle Loads and Health Conditions

Research on Vibration Law of Railway Tunnel Substructure under Different Axle Loads and Health Conditions

Probabilistic Design and Optimization for Tunnels considering Measuring Uncertainties

Nonlinear Vibration Analysis for Stiffened Cylindrical Shells Subjected to Electromagnetic Environment

Contact Info

Product

Resources

About