摘要
杆与刚架弹性屈曲临界力的数值往往难以直接测定。为了克服这一困难,本文探讨了一个动测途径:测定压力(P)和频率(f)的关系,作出P—f曲线,该曲线可提供一个弹性屈曲的最早征兆——突变点。
The buckling load of a strut or a frame is often difficult to measure directly. In order to overcome this difficult, a vibrational approach is investigated in this paper: To measure the relation between compression force (P) and frequency (f), then, construct a P—f curve, this curve will provide a earliest signal of elastic buckling—abrupt point.
关键词
压杆屈曲
自振频率
buckling of a bar
free vibration frequency
