等强度梁动应力测定及分析  

DYNAMIC STRESS MEASUREMENT AND ANALYSIS ON BEAM WITH CONSTANT STRENGTH

作　　者：马功勋[1] 徐郁文[1] 

机构地区：[1]南京工业大学,南京210009

出　　处：《理化检验（物理分册）》2002年第8期334-336,359,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：借助于应变频谱和应变导纳 ,提出一种测定动应力的方法。探讨了等强度悬臂梁的动应变分布。等强度悬臂梁动应变分布明显地不同于静应变分布。等强度悬臂梁的动应变不再保持常数。其基本振动的动应变从固定端到自由端呈下降趋势 。By strain spectrum and strain mobility, a method for measuring stress has been present. Distribution of dynamic strains for beam of constant strength has been investigated. For beam of constant strength, distributions of static and dynamic strains are different apparently. Dynamic strains are not constant. Dynamic strains of one degree natural vibration tend to decline from fix end to free end. This tend is in opposite direction with vibration displacements.

关 键 词：等强度梁 动应力 功率谱 应变导纳 测量 应变频谱 

分 类 号：TB301[一般工业技术—材料科学与工程] TU323.3[建筑科学—结构工程]