圆柱外表面受热冲击问题的广义热弹性分析

被引：8
作者：
王颖泽 [1 ]
张小兵 [2 ]
宋新南 [1 ]
机构：
[1] 江苏大学能源与动力工程学院
[2] 南京理工大学能源与动力工程学院
来源：
力学学报 | 2012年 / 44卷 / 02期
关键词：
热冲击; L-S广义热弹性理论; 耦合效应; 延迟效应; 解析解;
D O I：
暂无
中图分类号：
O343.6 [热弹性力学（热应力）];
学科分类号：
080102 ;
摘要：
基于L-S广义热弹性理论,针对实心圆柱体在外表面受均匀热冲击作用下的一维广义热弹性问题进行研究分析.利用热冲击的瞬时特征,借助于Laplace正、反变换技术及柱函数的渐近性质,推导了热冲击作用周期内温度场、位移场和应力场的渐近表达式.通过计算,得到了热冲击条件下各物理场的分布规律以及延迟效应和耦合效应对热弹性响应的影响规律.结果表明:当考虑延迟效应和耦合效应时,热扰动将以两组速度不同的波的形式向前传播,延迟效应和耦合效应对各物理场的建立时间,阶跃间隔和阶跃峰值均产生影响,且延迟效应和耦合效应均在一定程度上削弱了热冲击的作用效果.
引用
收藏
页码：317 / 325
页数：9
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