电磁发射轨道的非傅里叶热应力分析  

Non-Fourier thermal stress analysis of launching electromagnetic rail

作　　者：赵凌康 田振国[1,2] 靳利园 韩森林 Zhao Lingkang;Tian Zhenguo;Jin Liyuan;Han Senlin(College of Sciences,Yanshan University,066004,Qinhuangdao,China;Key Laboratory of Mechanical Reliability for Heavy Equipments and Large Structires of Hebei Provinee Yanshan Umiversity 066004,Qinhuangdao,China)

机构地区：[1]燕山大学建筑工程与力学学院,秦皇岛066004 [2]燕山大学河北省重型装备与大型结构力学可靠性重点实验室,秦皇岛066004

出　　处：《应用力学学报》2021年第2期818-824,共7页Chinese Journal of Applied Mechanics

基　　金：河北省自然科学基金(A2015203086)。

摘　　要：电磁轨道发射过程中快速升高的温度会导致热应力的急剧变化,这种变化有可能导致轨道的破坏,对轨道的发射效率和寿命造成影响。为了研究轨道应力场的变化规律,利用电磁发射轨道的轨道热传导方程和数据拟合方法得到了沿轨道方向的温度场变化特性,运用应力场理论分析了非傅里叶热效应对轨道应力场的影响。结果表明:电磁轨道炮发射过程中电枢与轨道的热接触,尤其是初始计算位置接触的边界上,其热应力应该考虑非傅里叶热效应所带来的影响。Rapidly rising temperatures during electromagnetic orbital launches can cause drastic changes in thermal stress.This change may cause damage to the orbit and will affect the launch efficiency and life of the orbit.In order to study the variation law of the orbital stress field,the orbital heat conduction equation and data fitting method of the electromagnetic emission orbit are used to obtain the temperature field variation characteristics along the orbital direction.The effect of non-Fourier thermal effects on the orbital stress field is analyzed using the stress field theory.Results show that the electromagnetic armature is in thermal contact with the orbit during the launching process,especially at the boundary of the initial calculated position contact.The thermal stress should take into account the effects of non-Fourier heat effects.

关 键 词：电磁轨道 瞬态温度场 函数拟合 非傅里叶热应力 

分 类 号：O39[理学—工程力学]