摘要
为解决装配界面接触热性能不足引起的散热性能和工作性能不足的问题,首先,构建了基于实测粗糙表面形貌的装配界面接触热性能数值分析模型;其次,测试了相应压力和温度工况下接触热阻以验证数值模型的准确性;最后,从装配界面微观接触传热机理出发,提出了装配界面导热特性异质化设计思路,建立了装配界面导热特性渐进迭代优化设计方法。结果表明:构建的装配界面接触热性能数值分析模型能够实现接触热性能的高精度预测,与实验结果对比,相对误差为15.52%;装配界面导热特性异质化设计通过提高界面温度梯度分布均匀性,有效降低接触热阻,优化设计后接触热性能提高23.12%。该研究为保障电子芯片封装、航天飞行器等热敏感复杂机械产品的接触热性能与整体散热性能提供了新的技术支撑。
To address the inadequate heat dissipation and operational performance caused by insufficient contact thermal performance at assembly interfaces,this study first establishes a numerical analysis model for contact thermal performance based on measured rough surface topography of assembly interfaces.Subsequently,contact thermal resistance under corresponding pressure and temperature conditions is tested to verify the accuracy of the numerical model.Finally,starting from the microscopic heat transfer mechanism at the assembly interface,a heterogeneous design approach for thermal conductivity is proposed,establishing a progressive iterative optimization design method for the thermal conductivity of assembly interfaces.The results demonstrate that the constructed numerical analysis model for contact thermal performance can achieve high-precision predictions,with a relative error of 15.52%.The heterogeneous design of thermal conductivity effectively reduces contact thermal resistance by improving the uniformity of temperature gradient distribution at the interface,resulting in a 23.12%improvement in contact thermal performance after optimization.This study provides new technical support for ensuring the contact thermal performance and overall heat dissipation in thermally sensitive complex mechanical products,such as electronic chip packaging and aerospace vehicles.
作者
王晨
林起崟
丘铭军
洪军
WANG Chen;LIN Qiyin;QIU Mingjun;HONG Jun(Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi’an Jiaotong University,Xi’an 710049,China;School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;National Key Laboratory of Metal Forming Technology and Heavy Equipment,Xi’an 710018,China;China National Heavy Machinery Research Institute Co.,Ltd.,Xi’an 710018,China)
出处
《西安交通大学学报》
北大核心
2025年第9期65-76,共12页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金优秀青年科学基金项目(52222508)
国家自然科学基金联合基金资助项目(U24B6006)
国家自然科学基金重点项目(52335011)。
关键词
复杂机械产品
装配界面
接触热阻
导热特性
异质化
优化设计
complex mechanical products
assembly interface
thermal contact resistance
thermal conductivity
heterogeneous
optimal design
