柴油机气缸体热-机耦合仿真分析  

Simulation of Thermal-Mechanical Coupling Stress Distribution in Cylinder Block of Diesel Engine

作　　者：康琦 董意 刘天水[1] 舒自富 吴子豪[1] KANG Qi;DONG Yi;LIU Tianshui;SHU Zifu;WU Zihao(China Satellite Maritime Tracking and Controlling Department, Jiangyin 214431, China;Army Academy of Armored Forces, Beijing 100072, China)

机构地区：[1]中国卫星海上测控部,江苏江阴214431 [2]陆军装甲兵学院,北京100072

出　　处：《兵器装备工程学报》2020年第9期227-231,共5页Journal of Ordnance Equipment Engineering

摘　　要：采用序贯耦合分析法对气缸体进行热-机耦合,得到气缸体稳态下的温度场和应力场。分析了不同时刻所受到的耦合应力值,为疲劳寿命分析以及结构改进提供了依据和参考。结果显示:气缸体最高温度为374.49 K、最低温度为327.51 K,温度分布由上到下、由中间向两侧逐渐降低;气缸体最大热应力为21.967 MPa,热负荷不大,工作环境较为理想;气缸体承受的最大热-机械耦合应力为65 MPa,主要集中在气缸盖连接螺栓孔周围,两气缸套顶部之间气缸体区域耦合应力也较大。The sequential coupling analysis method was used to analyze the thermal-mechanical coupling stress distribution of the cylinder block.The temperature field was analyzed,and then the thermo-mechanical coupling was performed on the basis of temperature field analysis to obtain the temperature field and stress field in the steady state of the cylinder block.The coupling stress values received at different moments were analyzed in detail,which provides a basis and reference for fatigue life analysis and structural improvement.The results show that the maximum temperature of the cylinder block is 374.49 K and the lowest temperature is 327.51 K.The temperature distribution decreases from top to bottom and from the middle to the both sides.The maximum thermal stress of the cylinder block is 21.967 MPa,the heat load is not large,and the working environment is ideal.The maximum thermal-mechanical coupling stress of the cylinder block is 65 MPa,which is mainly concentrated around the bolt hole connecting with the cylinder head,and the coupling stress of the cylinder block region between the tops of the cylinder liner is also large.

关 键 词：气缸体 热负荷 机械负荷 耦合 仿真 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]