含通电碳纤维复合板电加热过程的数值模拟及优化设计

Numerical Simulation and Optimization Design of the Electric Heating Process of Electrified Carbon Fiber Composite Board

通过对碳纤维复合板进行模拟仿真发现,其由碳纤维发热丝束与碳纤维布复合得到。利用ABAQUS软件对温度场进行分析,确定了采用复合板通电加热的数学模型和模拟方法。基于影响温度场的部分因素对模型进行了优化设计。结果表明,含通电碳纤维复合板的上表面温度升高至约35℃,最大温度差为1.97℃,测得的上表面温度与实验值能较好的吻合。对模型进行预测发现,当温度为-12℃时,该板的温度升高至0℃以上。另外,在加热功率相同的条件下,随碳纤维发热丝束间距的增加,上表面的平均温度变化较小;随碳纤维发热丝束间距的减小,上表面温度分布的均匀性得到显著提升。在碳纤维发热丝束间距相同的条件下,随碳纤维发热丝束加热功率的增大,上表面温度显著升高,但是,上表面温度分布的不均匀程度增大。当发热丝间距为8或6 mm、通电功率为45 W的条件下,复合板可正常工作。

The electric heating prospect of carbon fiber composite was wide.According to the experiment,a simulation was carried out for the carbon fiber composite board,which was composed of carbon fiber bundles and carbon fiber cloth.ABAQUS was used to analyze the temperature field,and the mathematical model and simulation method of the composite plate were determined.The model was optimized based on some factors affecting the temperature field.The results showed that the upper surface temperature of the board increases to about 35℃,and the maximum temperature difference was 1.97℃.The temperature of the upper surface were in good agreement with the test.The model found that the plate could be heated to above zero at-12℃.In addition,changing the wire spacing had little effect on the average temperature of the upper surface.The heating power of wire increases,the temperature increased obviously,but the temperature distribution was not uniform,and the decrease of wire spacing had a very obvious effect on the temperature uniformity.The heating wire spacing was 8 mm or 6 mm under the working condition of 45 W,the board worked well.