A DIGITAL FILTER METHOD FOR FORCED RESPONSE COMPUTATION

机译：强制响应计算的数字滤波器方法

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Transient forced response of mechanical structures isrnusually computed using time domain integration. This isrnoften computationally costly, and the numerical precisionrnand stability are concerns. In the present paper, a novelrnmethod based on modal superposition, using a new digitalrnfilter implementation, is presented. Poles and residues ofrnthe model are used as input data, which allows for usingrndata from a finite element model, a lumped parameterrnmodel, or from experimental modal analysis. Modalrndamping can be used if the damping matrix is unknown.rnWith the proposed method, the frequency dependant errorrncan easily be computed, and can be chosen arbitrarilyrnsmall by selecting proper sampling frequency (timernincrement). The method is applicable to all linearrnstructures and can be used for stationary or transient inputrndata. Simulation results show that the new method isrnsuperior to the alternative methods, at less computationalrncost.

机译：通常使用时域积分来计算机械结构的瞬态强迫响应。这在计算上是昂贵的，并且数值精度和稳定性受到关注。在本文中，提出了一种基于模态叠加的新颖方法，使用了一种新的数字滤波器实现。该模型的极点和残差用作输入数据，从而允许使用来自有限元模型，集总参数模型或实验模态分析的数据。如果阻尼矩阵未知，则可以使用模态阻尼。所提出的方法可以很容易地计算出与频率有关的误差，并且可以通过选择适当的采样频率（时间增量）任意选择较小的频率。该方法适用于所有线性结构，可用于固定或瞬态输入数据。仿真结果表明，该新方法优于替代方法，计算量较小。

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来源
《IMAC-XXI: a conference amp; exposition on structural dynamics》|2003年|p.1-6|共6页
会议地点 Kissimmee FL(US)
作者
Anders H. Brandt; Kjell A. Ahlin;
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Department of Telecommunications and Signal ProcessingrnBlekinge Institute of Technology, Sweden;

Saven EduTech AB,rnP.O. Box 504, SE-183 25, T?by, Sweden;

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原文格式 PDF
正文语种 eng
中图分类结构力学;结构力学;
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专利

1. Relationship between input-scaling and stability of the forced response of recursive digital filters [J] . Sim P.K. IEEE Transactions on Circuits and Systems . 1988,第5期

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2. A computational method for the LU decomposition of rectangular matrices and its implications to the realization of 2-D digital filters [J] . Charalambous C., Nashashibi A.Y. IEEE Transactions on Signal Processing . 1992,第11期

机译：矩形矩阵LU分解的计算方法及其对二维数字滤波器实现的启示
3. Design of Digital FIR (Finite impulse Response) Filters for Nuclear Pulse Processing using Convolution Method [J] . B. Ram Mohan Reddy Journal of the Instrument Society of India: Proceedings of the national symposium on instrumentation . 2011,第2期

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4. A DIGITAL FILTER METHOD FOR FORCED RESPONSE COMPUTATION [C] . Anders H. Brandt, Kjell A. Ahlin International Modal Analysis Conference . 2004

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5. DYNAMICALLY FILTERED LINEAR MULTI-STEP METHODS AND THE COMPUTATION OF SMOOTH SOLUTIONS OF OSCILLATORY STIFF ORDINARY DIFFERENTIAL EQUATIONS. [D] . MAJDA, GEORGE JOSEPH. 1980

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7. The design and implementation of a digital infinite impulse response (IIR) Lowpass Butterworth filter– impulse response (IIR) Lowpass Butterworth filter– A comparison of Matlab and Bilinear transformation methods [O] . B. J. Kwaha 2011

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8. Computation of LMS (Least-Mean-Square) and Matched Digital Filters for Optical Clutter Suppression [R] . Longmire, M. S., Takken, E. H. 1987

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A DIGITAL FILTER METHOD FOR FORCED RESPONSE COMPUTATION

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