摘要
涡壳的热应力是引起涡壳破坏的主要原因。在涡轮增压器新产品开发过程中,必须对涡壳的强度问题进行深入研究。采用有限元方法对涡壳的温度场和热应力进行非线性分析。在CATIA软件中进行几何建模和网格划分,然后在ANSYS中进行分析计算。分析结果表明,涡壳的温度在几秒钟内迅速升至最高温度,在冷却阶段又迅速冷却至350°F。而且涡壳的舌形挡板(Tongue)对温度变化比较敏感。涡壳的最大热应力发生在冷却初始时刻,此时舌形挡板的压应力最大,流道分隔墙(Divider)和V型圈边(V-band)区域受的拉应力也为最大。这些分析结果与涡轮增压器涡壳的实测结果有很好的一致性。
Thermal stress is main reason that it brings turbocharger housing to destroy. During new products development, the housing strength must be carefully studied. Temperature field and thermal stress of turbocharger housing were nonlinear analyzed with finite element method（FEM）. The modeling and meshing were made by CATIA,then the analysis was made by ANSYS. The results show that the temperature of the housing increases to the highest level at several seconds, and it decreases to 350°F through cooling. The tongue is sensitive to temperature variation. The maximum thermal stress of the housing occurs at initial cooling time when the compressive stress of tongue is maximum, and the tensile stresses of divider and V-band are maximum too. The calculation results are coincident well with the experimental measuring data.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2007年第1期130-134,共5页
Journal of Mechanical Strength
关键词
有限元
涡壳
温度场
热应力
Finite element method
Turbocharger housing
Temperature field
Thermal stress
