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基于增量谐波平衡法的杜芬方程非线性区间多值自动求解算法 预览

Automatic Multivalue Algorithm of Nonlinear Interval of Duffing Equation Based on Incremental Harmonic Balance Method
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摘要 以典型的非线性振动系统杜芬方程为例,研究应用增量谐波平衡法自动求解非线性方程区间内多值的问题。在非线性区间内选择一个与幅频特性曲线趋向相似的谐波项系数作为主动变量,根据振幅的变化情况,自动选择不同谐波项系数,直到求出所有的值,所求出的值与四阶Runge-Kutta法的结果相比精确度相当,验证了算法的正确性。 Taking the typical nonlinear vibration Duffing equation as an example,this paper studied the problem of solving multi-values of nonlinear equation intervals using the incremental harmonic balance(IHB)method.With a harmonic coefficient in the nonlinear interval as the active variable,which was similar to the tendency of the amplitude-frequency curve,different harmonic coefficients were automatically selected according to the change of amplitude,until all values were calculated.The calculated values were compared with the results obtained by four-order Runge-Kutta method.The results show that the two methods are equally precise,verifying the correctness of this algorithm.
作者 张纯金 任勇生 纪淑娟 Zhang Chunjin , Ren Yongsheng ,Ji Shuj uan (1. College of Mechanical and Electronic Engineering,Shandong University of Science and Technology Qingdao, Shangdong 266590, China; 2. College of Information Science and Engineering, Shandong University of Science and Technology, Qingdao, Shangdong 266590, China)
出处 《山东科技大学学报:自然科学版》 CAS 2015年第5期92-97,共6页 Journal of Shandong Univ of Sci and Technol: Nat Sci
基金 国家自然科学基金项目(11272190,10972124)
关键词 增量谐波平衡法 非线性振动 杜芬方程 幅频响应 incremental harmonic balance method nonlinear vibration Duffing equation amplitude frequency corre-sponding
作者简介 张纯金(1977-),男,山东郓城人,工程师,博士研究生,主要从事非线性振动方面的研究.E-mail:zhangchjin@163.com
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