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通过有限元分析软件ANSYS中APDL参数化语言二次开发编程,建立了空心玻璃微球填充酚醛树脂复合泡沫塑料空间随机分布模型。选取代表体积单元进行有限元分析,模拟了不同空心玻璃微球填充量下复合泡沫塑料等效导热系数的变化。研究表明:空心玻璃微球有效阻隔了体系内热流的传递,提高了复合泡沫塑料的隔热性能,随着微球含量的增加,体系的等效导热系数由纯环氧树脂的0.203 W/(m·K)减小到体积分数40%填充量时的0.138 W/(m·K)。引入经典模型和实验数据进行验证,与经典模型相比,有限元分析方法更能准确模拟复合泡沫塑料等效导热系数的实际情况。
Through the secondary development and programming of the APDL parametric language in the finite element analysis software ANSYS, a stochastic distribution model of hollow glass microsphere-filled phenolic resin composite foam was established. The representative element of volume was chosen for the finite element analysis to simulate the change of the equivalent thermal conductivity of the composite foam with different hollow glass microspheres loading. The results show that hollow glass microspheres can effectively block the heat transfer in the system and improve the thermal insulation performance of the composite foam. With the increase of the content of microspheres, the equivalent thermal conductivity of the system is improved from 0.203 W / ( m · K) to 0.138 W / (m · K) at 40% volume fraction. The classical model and experimental data are used to verify. Compared with the classical model, the finite element analysis method can accurately simulate the actual situation of the equivalent thermal conductivity of the composite foam.