作 者: ;
机构地区: 中山大学工学院应用力学与工程系
出 处: 《中山大学学报(自然科学版)》 1999年第3期17-20,共4页
摘 要: 研究了弹性地基上方形构件在横向空气动力作用下的振动现象.分别采用七次及三次多项式对实测的空气动力进行拟合.利用平均化方法分析了物体的极限环运动规律,以及典型的分叉、跳跃。 An investigation is made of the wind excited oscillation of a square object on elastic foundation Based upon the experimentally measured results in the wind tunnel tests, the aerodynamic forces are fit by the seventh order polynomial and the third order polynomial respectively With the aid of the averaging method, the typical non linear phenomena such as limit cycle, bifurcation, jump and hysteresis are obtained