悬臂梁冲击动载荷识别的试验研究
关键词 载荷识别 切比雪夫广义正交 函数拟合 实验仿真
毕业论文设计说明书（论文）外文摘要
Title Experimental study on dynamic load identification cantilever
Abstract
Question of this study is to identify the dynamic load problem , the problem belongs to the category of vibration , the vibration problem is the inverse problem of the second kind .In engineering practice, the effective recognition load can guarantee reliability and safety engineering and structural dynamic load widespread recognition applications , more and more people pay attention to their studies , the researchers have achieved good results . This article summarizes the various load identification problems common method move, such as the regularization method , wavelet method , time domain , frequency domain method and describes its basic principles and main engineering applications. In this paper, load identification theory is generalized orthogonal Chebyshev orthogonal polynomials , this paper is to introduce the theoretical derivation of its key processes and identify software simulation and experiment. Identifying the main idea is to use orthogonal polynomials to fit the dynamic load function , build relationships response and progression coefficient by the inherent characteristics of limited information and systems of measurement points to get the polynomial coefficients , thereby achieving dynamic load identification .This article first theoretical derivation and simulation analysis and cantilever experiments. Simulation and experimental data confirmed: this method can complete the identification of the Izod impact loads , but there is still insufficient.
Keywords Load identification Generalized Chebyshev quadrature
formula Function fitting The simulation
目 次
1 引言1
2 绪论2
2.1 课题研究背景与意义 2
2.2 基本概念介绍2
2.3 目前研究方法3
2.4 载荷识别方法发展展望5
2.5 本文的主要工作…6
3 广义正交域法…7
3.1 广义正交多项式…7
3.2切比雪夫正交多项式…8
3.3 时间有限元法9
4 基于修正广义正交域的动载荷识别10
4.1 两类多项式介绍…10
4.2 载荷识别法的优化11
4.3 总结 12