Difference Discrete System of the Euler-Beam With Arbitrary Supports and Sign-Oscillatory Property of Stiffness Matrices
-
摘要: 应用二阶中心差分公式,建立了任意支承的Euler梁的差分离散系统,导出了与之等效的弹簧-质点-刚杆模型.利用振荡矩阵理论,证明了上述系统的刚度矩阵的符号振荡性,完整的导出了正系统的充分必要条件.Abstract: The difference discrete system of Euler beam with arbitrary supports was constructed by using the two order central difference formulas.This system is equivalent to the spring-mass point-rigid rod model.By using the theory about oscillatory matrix,the sign-oscillatory property of stiffness matrices of this system was proved,and necessary and sufficient condition for the system to be positive is obtained completely.
-
Key words:
- Euler beam /
- difference discrete system /
- stiffness matrice /
- sign-oscillatory property
-
[1] Гантмахер Ф Р,Крейн М Г.Осцилляцонные Матрицы и Ядра и Малые Колебания Механических Систем[M].Москва: Государственное Издательство Технико-Теоретической Литературы,1950,90—170. [2] Gladwell G M L.Inverse Problems in Vibrating[M].Boston: Martinus Nijhoff Publishers,1986,23—26,219—225. [3] Gladwell G M L.Qualitative properties of vibration systems[J].Proc Roy Soc London,Ser A,1985,401:299—315. doi: 10.1098/rspa.1985.0100 [4] 何北昌,王大钧,王其申. Euler梁有限差分模型的振动逆问题[J].振动工程学报,1989,2(2):1—9. [5] 王其申,何北昌,王大钧.Euler梁的模态和频谱的一些定性性质[J].振动工程学报,1990,3(4):58—66. [6] WANG Da-jun,Chon C S,WANG Qi-shen.Qualitative properties of frequencies and modes of beams modeled by discrete systems[J].The Chinese J of Mechanics,Series A,2003,19(1):169—175.
计量
- 文章访问数: 3049
- HTML全文浏览量: 128
- PDF下载量: 676
- 被引次数: 0