


摘 要:本文介紹了某地面通信设备结构散热设计过程,在满足总体单位提出的结构尺寸需求下,通过对元器件发热量以及热量传播方式的分析,设计出传导配合自然对流散热机箱以及强迫风冷机箱两种方案,并采用ANSYS Icepak软件进行温度仿真验证,通过合理设置环境条件和求解参数,计算出温度仿真云图,得到关键元器件工作温度,结果表明两种机箱方案均满足散热需求。
关键词:通信设备;散热设计;温度仿真
中图分类号:TN02;TN802 文献标识码:A 文章编号:2096-4706(2019)12-0050-04
Abstract:This paper describes the heat dissipation design process for the ground communication equipment. In order to meet the structural size requirements proposed by the general unit,two kinds of conduction schemes combined with the natural convection radiator box and the forced fan box were designed by analyzing the heating and heat transfer modes of the components. Temperature simulation was performed using ANSYS Icepak software. By reasonably setting the environmental conditions and solving the parameters,the temperature simulation cloud is calculated,and the working temperature of key components is obtained. The results show that the two cabinet schemes can meet the heat dissipation requirements.
Keywords:communication equipment;thermal design;temperature simulation
0 引 言
随着地面通信设备电路特征尺寸减小以及元器件布局的密集化,单位面积上的产热量急剧增大,这对结构散热设计提出更严苛需求,为保证设备不产生热失效而能够正常运转,选用合适的冷却方式与优化结构布局将热量耗散掉已成为产品研发的重要突破点。
散热方式包含自然对流、热辐射、热传导三种,在实际产品设计中需要依据产品使用环境及相应的结构设计要求选用合适的散热方式以降低元器件温度,地面通信设备常采用自然对流或者强迫对流散热方式,采用自然对流散热方式时需要对高热耗的元器件加装散热冷板和导热垫,扩大散热面积以减小散热热阻;采用强迫风冷时需选用合适的风扇,优化风道与印制板模块布局以减小风道阻力损失,同时又要兼容电磁兼容性与结构三防性等其他要求。无论采用哪种设计方案,均需要采用仿真计算模拟设备散热情况,发现散热薄弱环节,在满足整体结构设计要求前提下更新结构布局,满足散热需求。……