偏心轴向作用下杆件的稳态响应计算  

STEADY RESPONSES OF ROD UNDER ECCENTRIC AXIAL LOADING

作　　者：张萍 ZHANG Ping(Department of Mechanical and Electrical Engineering,Yantai Automobile Engineering Professional College,Yantai 265500,China)

机构地区：[1]烟台汽车工程职业学院机电工程系,烟台265500

出　　处：《机械强度》2020年第2期308-312,共5页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(11672301)资助。

摘　　要：偏心受力杆在工程中随处可见,其应力和强度计算直接关乎到它们的工作可靠性,尤其是动态应力计算更为关键。利用线弹性动力学理论研究了偏心受力杆件在稳态力作用下的弯曲正应力和轴向正应力的计算问题,给出了解析表达式,并通过数值算例计算了杆件不同截面处弯曲正应力幅度和轴向正应力幅度随扰动频率的变化规律,理论分析和数值算例结果表明,杆件中最大弯曲正应力幅度和轴向应力幅度的大小受扰动频率的影响较为明显,这与相应的静态问题分析是完全不同的,分析和结论对于偏心压杆的动态可靠性设计有一定参考意义。The pull rod under eccentric loading exists extensively in engineering project,the computations of its stress and strength directly affect its reliability,especially its dynamic stress computations.The elastic dynamic mechanics were used here to study the computations of the bending stress and axial stress of the eccentric loaded rod under steady force,and the analytic expressions were given,numerical example was provided to show the variations of the amplitude of the bending stress and axial stress with the disturbance frequency,the theoretical analyses and the computation results of given example show that the amplitude of the bending stress and axial stress obviously depend on the disturbance frequency,which is different from that of corresponding static problems.The analyses and conclusions given here have some references to the dynamic reliability design.

关 键 词：偏心受力杆 稳态轴向力 弯曲正应力 轴向正应力 扰动频率 

分 类 号：TH113.1[机械工程—机械设计及理论]