激光束照射下轴压圆柱薄壳热屈曲数值分析  

THERMO BUCKLING FAILURE OF AXIALLY COMPRESSED CYLINDRICAL SHELL IRRADIATED BY LASER BEAM

作　　者：邓可顺[1] 纪峥[1] 

机构地区：[1]大连理工大学工程力学研究所

出　　处：《强激光与粒子束》1998年第2期212-216,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金;中国工程物理研究院院外基金

摘　　要：针对激光束照射下承受轴压作用的圆柱薄壳，实现了材料参数（弹性模量Ｅ，泊桑比μ、线膨胀系数α）随温度变化情况下热屈曲破坏有限元数值分析。数值计算结果表明，激光照射区域产生的热应力和材料软化将导致处于正常工作状态的轴压圆柱壳发生灾难性的热屈曲破坏。A numerical model of the bifurcation thermo buckling failure of axially compressed cylindrical shell irradiated laser beam is established. The material physical properties, such as Youngs modulus, Poissons ratio and coefficient of thermal expansion, are changing with temperature. So that the thermal buckling behaviour is actually nonlinear with respect to temperature. A corresponding computer program by using finite element methed is coded in FORTRAN 77 and is implemented on microcomputers. Numerical results show that the thermal stress and material softening irradiated laser beam will induce the catastrophic buckling failure of the pre compressed cylindrical shell.

关 键 词：圆柱壳 激光 热屈曲 数值分析 温度场 

分 类 号：O344[理学—固体力学]