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圆形介质杆弹性(或膨胀)夹持的螺旋线慢波结构的散热能力分析,目前还存在着计算接触面积与界面热阻的困难。本文试图解决这两个问题。文中建立了一个物理模型,推导了变形力与夹持过盈的关系式,使用弹性力学的分析结果求出了介质杆与螺旋线及管壳的接触面积。并引入了一个面积系数,解决了热阻计算的困难。文中还考虑了各种几何尺寸、材料物理性能,装配过盈及热膨胀修正等因素,编制了计算机程序进行了计算,结果与实验较为一致,从而得到了一些有设计参考价值的散热数据。
Analysis of heat dissipating ability of helical slow-wave structures with elastic (or expanding) holding of circular dielectric rods, there are still some difficulties in calculating contact area and interface thermal resistance. This article attempts to solve both of these problems. In this paper, a physical model is established, and the relation between deformation force and clamping interference is deduced. The contact area between the rod and the spiral tube and the shell is obtained by using the analysis results of elasticity. And the introduction of an area coefficient to solve the thermal resistance calculation difficulties. In this paper, various geometrical dimensions, material physical properties, assembly interference and thermal expansion correction are also taken into account. Computer programs are compiled and the results are consistent with the experimental results. Some thermal dissipation data with design reference values are obtained.