Finite Element Analysis of Diesel Engine Cylinder Head Based on Thermosetting Coupling

GONG Jinke, HE Wei, ZHONG Chao, TIAN Yinghua

Abstract

 A simulation model of a certain diesel engine was built by ABAQUS to solve the engine cracking problem. The temperature boundary of the model was calibrated based on experimental temperature data. The temperature and stress/deformation distributions of the diesel engine were analyzed based on the thermosetting coupling theory. Three kinds of cylinder center surfaces including convex, flat, and concave surfaces were put forward due to the thermal stress concentration in the bridge of nose area. Simulations were carried out to verify these three projects. It showed that the stress of the concave surface was smaller than others. Reduction of the wall thickness of the center area decreased the maximum stress of the bridge of nose area. The temperature distribution of the analysis model was found to be consistent with the experimental results. The experimental results also verified the accuracy of the thermosetting coupling numerical simulation. In a whole, the investigation in this paper provides the theoretical basis for the optimization design of the cylinder head.

 

 

Keywords: cylinder heads,  coupled heat transfer,  temperature field,  thermal stress


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References


Hongzhen. LIU Hong, GUO Lei, et al. Cyliner head fauilure diagnosis based on coupled thermalmechanical method [J]. Internal Combustion Engine &- Parts.2013 (8) :9- 12. (In Chinese)

ZHAO Weimao. ZHANG Weizheng. YUAN Yanpeng. et al. Simulation and experiment of temperature field on diesel engine cylinder head before and after enhancement of power [J]. Transactions of the Chinese Society for Agricultural Machiner. 2009.3(3) r51 - 55. (In Chinese)

ZHAO Xinyuan.LIU Jiquan. Thermal-structure coupling analysis of engine cylinder head[J]. Mechanical Engineering & Automation. 201 1.6(3);67 - 69. (In Chinese)

WANG Fei. Thermal-mechanical coupling finite element strength analysis of typical parts of aviation engine [D]. Nanjing: College of Energy and Power Engineering. Nanjing University of Aeronautics and Astronautics.2013. (In Chinese)

XU Hangjun. Structural optimization for diesel engine cooling systems and thermal stress analysis for its cylinder head [D]. Tianjin:College of Mechanical Engineering.Tianjin Polytechnic University.2010:11 - 15. (In Chinese)

TIAN Yinghua. JIA Guohai. et al. Numerical simulation on coupled heat transfer of turbocharger bearing [J]. Journal of Hunan University: Natural Sciences. 2015. 42 (4):7 -12. (In Chinese)

YANG NVanli.XU Min.XIN Jun.et al. Coupling thermal stress analysis of engine cylinder head [J]. Chinese Internal Combustion Engine Engineering.2007.28(2) :47 -50. (In Chinese)

ERRERA M P. CHEMIN S. Optimal solutions of numerical interface conditions in fluid-structure thermal analysis [J]. Journal of Computational Physics. 2013. 215: 431 - 455.

CAO Longfei. Study on thermal expansion properties of steels [D]. Wuhan: College of Material and Metallurgy. Wuhan University of Science and Technology.2013. (In Chinese)

GAI Hongwu.CHENG Ying.YAO Xiugong. Analysis on thermo-mechanical coupling fatigue of bridge zone of diesel engine cylinder head [J]. Computer Aided Engineering. 2013.8(4) :25 - 28. (In Chinese)

HU Youan. LI Xiaodong. Experimental study on heat cracks of turbine housing on lurbochargers [J]. Journal of Iiohai University: Natural Sciences.2008,36(6):846 - 849. (In Chinese)


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