摘要
针对LED汽车前照灯的散热问题,对比设计两款有/无散热槽的新型散热器结构形式,利用有限元分析软件ANSYS进行散热结构的热力学分析。针对初始设计的散热结构形式采用控制变量法进行参数优化,最后得出无槽结构的LED灯具最高温度为65.352℃,热应力为235.56MPa;同等条件下有槽结构的LED灯具最高温度为62.712℃,最大应力为218.7 MPa。计算可知,具有散热槽LED灯具散热器优化后的温度相对无散热槽LED灯具散热器优化后的温度降低2.64℃,最大应力减小16.86 MPa。该仿真结果表明具有散热槽结构的散热器能够提高LED汽车前照灯的散热效果。
Regarding the heat dissipation problem of LED automotive headlights,two structures with and without grooves were designed and compared.The temperature and stress distribution of the two heat dissipation structures were investigated by ANSYS software.The control variate method was used to optimize the initial design parameters of the heat dissipation structures.The maximum temperature of the LED automotive headlights without grooves is 65.352℃,and the thermal stress is 235.56 MPa,which under the same condition with grooves are 62.712℃and 218.7 MPa respectively.The results show that the maximum temperature of the LED automotive headlights is 2.64℃lower for optimized grooved structures than that without grooves.And the maximum stress decreases by 16.86 MPa at the same time for grooved structures.The LED automotive headlights with groove can improve the heat dissipation.This work can theoretically guide the design of LED automotive headlights.
作者
刘东静
王浩洁
樊亚松
梁海志
LIU Dongjing;WANG Haojie;FAN Yasong;LIANG Haizhi(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,Guangxi Zhuang AutonomousRegion,China;School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu Province,China)
出处
《电子元件与材料》
CAS
CSCD
北大核心
2019年第7期63-68,共6页
Electronic Components And Materials
基金
中国博士后科学基金(2016M601729)
广西中青年教师基础能力提升项目(2018KY0196
2018KY0205)
广西自然科学青年基金(2018GXNSFBA281126)
广西科技基地和人才专业(2018AD19055)
关键词
LED汽车前照灯
控制变量法
结温
应力
LED automobile headlights
control variate method
junction temperature
stress
