X射线作用下结构热力学效应模拟  

Simulation on thermodynamics effect of structure under X-ray

作　　者：黎维芬[1] 冯加权[1] 余绍蓉[1] 

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《计算机辅助工程》2011年第1期117-120,共4页Computer Aided Engineering

摘　　要：为研究X射线作用下结构的热力学效应,阐述X射线作用下结构可能产生的一系列响应,对能量沉积下的某结构开展热-力耦合数值模拟分析.分析中考虑泡沫材料的超弹特性和大变形以及结构中的接触关系和间隙热阻.结果表明,X射线作用主要引起结构外表面的温度升高;在X射线载荷作用下,由于温度冲击,结构最大等效应力大于材料的屈服应力,结构局部发生屈服.To study the thermodynamics effect of structure under X-ray,a series of responses generated by structures under X-ray are described,and the thermal-mechanical coupling effect is numerically simulated and analyzed under the effect of energy deposition.In the anaysis,the hyper-elastic characteristic and the large deformation of foam material are considered.At the same time,the contact relationship and the thermal resistance of gap are taken into account.The results indicate that,the main effect of X-ray is the temperature increase of the outer face;because of the thermal shock generated by X-ray,the maximum equivalent stress is greater than the yield stress of the material,and it results in the yield at the local part of the structure.

关 键 词：X射线 热力学效应 温度冲击 

分 类 号：TK123[动力工程及工程热物理—工程热物理] TB115.1[动力工程及工程热物理—热能工程]