Fatigue life prediction analysis of high-intensity marine diesel engine cylinder head based on fast thermal fluid solid coupling method

Zhang, Huabing; Cui, Yi; Liang, Gang; Li, Liting; Zhang, Guoyong; Qiao, Xinqi

doi:10.1007/s40430-021-03049-7

Cited by 13 publications

(7 citation statements)

References 31 publications

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“…The cylinder head is a component bearing high temperature and high pressure, used to form the combustion chamber and seal combustion gas. The typical structure of the cylinder head fire deck 5 is shown in Figure 3(a). The bottom fire deck directly contacts the combustion flame, and the other side is cooled by cooling water.…”

Section: Cylinder Head Scaled Specimen and Test Methodsmentioning

confidence: 99%

“…6K-type thermocouples are used to measure the temperature on each sample. In this experiment, the highest temperature was 650°C, 5 and the lowest temperature was 50°C for the accelerated test considering enhanced thermal load. Since a complete cycle was 340 s, the creep effect of the material was not considered.…”

Section: Thermal Cycling Test Of Scaled Specimenmentioning

confidence: 96%

“…As a complex key component of the combustion chamber, cylinder head exhibits a non-uniform temperature gradient under the comprehensive effect of high-temperature exhaust, low-temperature intake, flame heating, and water cooling. 4,5 Therefore, the cylinder head's valve bridge regions (VBR) are prone to thermal failure risk under alternating thermal-mechanical load cycles. [6][7][8] Figure 1 shows a case of cooling water leakage caused by the deformation of the water-cooled valve-seat holes on the cylinder head of a large-bore diesel engine after long-term operation service.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical studies of thermal-structural behavior based on cast iron scaled cylinder head specimen

Zhang

Liang

Qiao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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In order to clarify the thermal deformation and failure mechanism of the nodular cast iron cylinder head of marine diesel engines during long-term service, a high-efficiency thermal cycling experiment was conducted on scaled cylinder head specimen based on the similarity principle, and the thermal cycling load was simulated by flame heating and water spray cooling method. Then the Chaboche combined hardening model considering temperature and cumulative effect was established. The cyclic plastic behavior of the scaled specimen model during non-uniform thermal cycling was verified from transient temperature, cumulative out-of-round deformation and crack failure. Subsequently, the law of cyclic plastic deformation of specimens under thermal cycling was studied. The results showed that with the increase of the cycle number, the plastic strain of the valve bridge region of the scaled specimens accumulated gradually, showing a large amount of permanent strain of the circular hole within a maximum of 20.3 μm out-of-round deformation. The difference between the calculated and tested deformation is 1.9 μm (10.5%), which shows the excellent predictability of the numerical model. The research findings are valuable for predicting and evaluating the thermal-structural behavior of the prototype cylinder head.

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Section: Cylinder Head Scaled Specimen and Test Methodsmentioning

confidence: 99%

Section: Thermal Cycling Test Of Scaled Specimenmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and numerical studies of thermal-structural behavior based on cast iron scaled cylinder head specimen

Zhang

Liang

Qiao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

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“…Satyanarayana et al 18 analyzed the effects of engine operating conditions such as the maximum gas pressure and temperature on dynamic response of cylinder head. Zhang et al 19 proposed a heat transfer model to analyze the influence of temperature on the fatigue life of cylinder head. Zhang et al 20 applied the mechanical and thermal properties of cylinder head material to develop FE analysis at high temperature.…”

Section: Introductionmentioning

confidence: 99%

Effects analysis of thermo-mechanical loads on classified damage characteristics with the equivalent cylinder head model

Yang

Kang

Pang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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As a vulnerable part of diesel engine, cylinder head is periodically subjected to the thermo-mechanical coupling loads. While due to the restriction of complex structures and working conditions, it makes the damage mechanism of thermo-mechanical coupling still unclear. In this research, thermo-mechanical responses are predicted successfully by load spectrums and the Sehitoglu theory. Then the effects of working loads on classified damage characteristics are analyzed with the equivalent cylinder head model. The results show that the deviations of temperature and stress are, respectively, within 10°C and 30 MPa, and it verifies the effectiveness of simulated component. Operating speed takes the greatest effect on the thermo-mechanical characteristics, and bolt force and gas pressure are negatively correlated with the responses of stress and strain. Fatigue life and damage are determined by the values of working loads. The effect of temperature load is the most dominant, MechDam and OxidDam increase substantially when operating speed exceeds 3500 r/min. The research will provide a theoretical reference for engineering design and optimization of cylinder head.

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“…Taking exhaust manifold as an example, the finite element method is used by Li et al [5] to verify the effect of thermal load on its fatigue life. The high efficiency heat transfer model is used by Zhang et al [6] to analyze the direct relationship between cylinder head fatigue life and average gas temperature. In addition, Chaboche model is established to analyze the local deformation and leakage of cylinder head under thermal cycle test [7].…”

Section: Introductionmentioning

confidence: 99%

Heat Load Forecasting of Marine Diesel Engine Based on Long Short-Term Memory Network

et al. 2023

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High heat load on diesel engines is a main cause of ship failure, which can lead to ship downtime and pose a risk to personal safety and the environment. As such, predictive detection and maintenance measures are highly important. During the operation of marine diesel engines, operating data present strong dynamic, time lag, and nonlinear characteristics, and traditional models and prediction methods cause difficulties in accurately predicting the heat load. Therefore, the prediction of its heat load is a challenging and significant task. The continuously developing machine learning technology provides methods and ideas for intelligent detection and diagnosis maintenance. The prediction of diesel engine exhaust temperature using long short-term memory network (LSTM) is analyzed in this study to determine the diesel engine heat load and introduce an effective method. Spearman correlation coefficient method with the addition of artificial experience is utilized for feature selection to obtain the optimal input for the LSTM model. The model is applied to validate the ship data of the Shanghai Fuhai ship, and results show that the mean absolute percentage error (MAPE) of the model is lowest at 0.089. Compared with other models, the constructed prediction model presents higher accuracy and stability, as well as an optimal evaluation index. A new idea is thus provided for combining artificial knowledge experience with data-driven applications in engineering practice.

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Fatigue life prediction analysis of high-intensity marine diesel engine cylinder head based on fast thermal fluid solid coupling method

Cited by 13 publications

References 31 publications

Experimental and numerical studies of thermal-structural behavior based on cast iron scaled cylinder head specimen

Experimental and numerical studies of thermal-structural behavior based on cast iron scaled cylinder head specimen

Effects analysis of thermo-mechanical loads on classified damage characteristics with the equivalent cylinder head model

Heat Load Forecasting of Marine Diesel Engine Based on Long Short-Term Memory Network

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