根据给出的三维机织复合材料的细观模型,建立了三维机织复合材料导热性能的有限元模型.提出计算三维机织复合材料热膨胀系数及热传导系数的有限元计算方法。利用合理的网格离散,采用周期性的非绝热温度边界条件和位移边界条件,计算了三维机织结构的整体等效热传导系数及热膨胀系数。 According to the mesoscopic model of the three-dimensional woven composite, the finite element model of the thermal conductivity of the three-dimensional woven composite was established, and the calculation method of the thermal expansion coefficient and thermal conductivity of the three-dimensional woven composite was proposed. Using the reasonable grid discretization, the equivalent thermal conductivity and thermal expansion coefficient of the three-dimensional woven structure were calculated by using the periodic non-adiabatic temperature boundary conditions and the displacement boundary conditions.