Thermal-Mechanical Fatigue Analysis of Diesel Engine Cylinder Head Based on Fluid-Structure Interaction

2015 ◽  
Author(s):  
Xiaobei Cheng ◽  
Xin Wang ◽  
Yang Ming ◽  
Zhang Hongfei ◽  
Ran Gao
Keyword(s):  
Diesel Engine ◽  
Cylinder Head ◽  
Fluid Structure Interaction ◽  
Fatigue Analysis ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Thermal Mechanical Fatigue ◽  
Mechanical Fatigue ◽  
Engine Cylinder

scholarly journals Analysis and Optimisation of Thermo-Mechanical Coupling Load of Cylinder Head Considering Fluid-Structure Interaction for a Marine High-Power Diesel Engine

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3597
Author(s):  
Lei Hu ◽  
Jianguo Yang ◽  
Yonghua Yu ◽  
Fei Dong
Keyword(s):  
Diesel Engine ◽  
Boundary Conditions ◽  
Cylinder Head ◽  
Fluid Structure Interaction ◽  
Cooling Water ◽  
Fluid Structure ◽  
Mechanical Coupling ◽  
Structure Interaction ◽  
Fuel Supply ◽  
Valve Opening

A one-dimensional model of the diesel engine working process was established, and thermal boundary conditions of gases contacting with a cylinder head were determined by comparing them with the results of a routine test. A fluid-structure interaction model between the cooling water and cylinder head passages was established in which boundary conditions of cooling water were obtained by computational fluid dynamics analysis. Simultaneously, considering the pressure mechanical load in the cylinder, temperature and the stress distribution of the cylinder head were analysed by the model with a thermo-mechanical coupling load. The model was validated using the temperature hardness plug method. Four parameters of intake valve opening, exhaust valve opening, fuel supply beginning, and compression ratio were selected as influencing factors, and the thermo-mechanical coupling load of the cylinder head was optimised by the Taguchi and analysis of variance method subsequently. The study indicates that the error of the calculation model for the cylinder head’s thermal-mechanical coupling load is within ±1.5%, and the proportion of the thermal stress in the cylinder head thermal-mechanical coupling stress is above 90%. The fuel supply beginning has the greatest influence on the thermal load of the cylinder head. Based on the optimisation methods within the required power range, the maximum temperature and maximum thermo-structural coupling stress of the cylinder head are decreased by about 10.05 K and 7.13 MPa in the nose bridge area, respectively.

Fatigue Analysis of the Aircraft’s Hydraulic Pipes Based on Fluid–Structure Interaction

2011 ◽  
Vol 299-300 ◽  
pp. 917-920
Author(s):  
Hui Lv ◽  
Yuan Ying Qiu ◽  
Ying Sheng
Keyword(s):  
Finite Element Analysis ◽  
Work Environment ◽  
High Frequency ◽  
Pressure Pulsation ◽  
Fluid Structure Interaction ◽  
Fatigue Analysis ◽  
Element Analysis ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Ansys Cfx

In the work environment, the structure of aircraft’s hydraulic pipes and the fluid inside constitute a typical fluid-structure interaction (FSI) system, in which there are transfers of momentum and forces between the pipes and fluid. Excitation caused by high frequency pulsation of flow and pressure may lead to fatigue damage of the structure. In order to help the designers estimate the dynamic response of the aircraft’s hydraulic pipes, the FSI of aircraft’s hydraulic pipes is investigated in this paper. Using ANSYS CFX and ANSYS Mechanical as the tools, a finite element analysis was done to compute the stresses and strains of the fluid-filled pipes caused by high-pressure pulsation. Furthermore, the fatigue analysis was done to evaluate the safety of the structure.

Fatigue analysis in rotor of a prototype bulb turbine based on fluid-structure interaction

2021 ◽  
pp. 105940
Author(s):  
Jingwei Cao ◽  
Hong Tian ◽  
Soo-Hwang Ahn ◽  
Wenzhi Duo ◽  
Huili Bi ◽  
...  
Keyword(s):  
Fluid Structure Interaction ◽  
Fatigue Analysis ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Bulb Turbine

Engine Cylinder Head Thermal-Mechanical Fatigue Evaluation Technology and Platform Application

2019 ◽  
Vol 13 (1) ◽  
pp. 101-120 ◽  
Author(s):  
Xiaochun Zeng ◽  
Xuwei Luo ◽  
Guoxi Jing ◽  
Pingping Zou ◽  
Yuxing Lin ◽  
...  
Keyword(s):  
Cylinder Head ◽  
Thermal Mechanical Fatigue ◽  
Mechanical Fatigue ◽  
Engine Cylinder ◽  
Fatigue Evaluation
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