Rotational Degrees of Freedom for Structural Coupling Analysis via Finite-Difference Technique With Residual Compensation

Duarte, Maria Lúcia Machado; Ewins, D. J.

doi:10.1006/mssp.1999.1241

Cited by 60 publications

(16 citation statements)

References 7 publications

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“…Rotational DOF mobilities are usually neglected due to the difficulty associated with measuring rotational moments and accelerations at a point. While various attempts have been made to develop an accurate method for measuring these mobilities, the most commonly used approach is to infer the rotational information from measured translational information using a finite difference approach [10]. ANSI S2.34-1984 [11] defines standard methods for measuring or estimating the RDOF mobilities using either translational measurements or rotational measurements involving specialized fixtures.…”

Section: Rotational Degree Of Freedom Estimationmentioning

confidence: 99%

“…ANSI S2.34-1984 [11] defines standard methods for measuring or estimating the RDOF mobilities using either translational measurements or rotational measurements involving specialized fixtures. A compact implementation of the direct methods of this standard (i.e., the finite difference approach) has been implemented by Duarte and Ewins [10].…”

Section: Rotational Degree Of Freedom Estimationmentioning

confidence: 99%

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Substructure Synthesis Methods and Their Application to Structural-Acoustic Simulations

Campbell¹,

Pray²

2005

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Abstract: An overview of impedance-and modal-based substructure analysis techniques used in the Structural Acoustics Department is presented. The impedance technique described herein offers a substantial advantage over other coupling techniques because it is uniquely suited to handle data sets of varying origin. Of particular interest is the combination of numerically and experimentally derived frequency response data, which is especially useful for analyzing structures comprised of components too complex to model using the finite element technique. The impedance-based method is derived from the frequency domain substructure synthesis algorithm introduced by Jetmundsen et al [1], which offers a significant improvement over the traditional frequency domain technique in terms of the processing requirements. The modal-based methods involve the coupling of substructure eigenanalysis results to arrive at coupled system (complex-valued) eigenvectors and allow forced response simulations for the coupled system. This method offers an alternative to traditional techniques employed by commercial finite element codes. Limitations of both techniques are identified and discussed along with potential methods for avoiding these shortcomings. Several example problems are presented that show each method's usefulness.Hi

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Section: Rotational Degree Of Freedom Estimationmentioning

confidence: 99%

Section: Rotational Degree Of Freedom Estimationmentioning

confidence: 99%

Substructure Synthesis Methods and Their Application to Structural-Acoustic Simulations

Campbell¹,

Pray²

2005

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show abstract

“…Rotational DOF mobilities are usually neglected due to the difficulty associated with measuring rotational moments and accelerations at a point. While various attempts have been made to develop an accurate method for measuring these mobilities, the most commonly used approach is to infer the rotational information from measured translational information using a finite difference approach [9]. ANSI S2.34-1984 defines standard methods for measuring or estimating the RDOF mobilities using either translational measurements or rotational measurements involving specialized fixtures [10].…”

Section: Errors Caused By Rotational Degree Of Freedom Truncationmentioning

confidence: 99%

“…For example, first order accuracy requires the measurement of mobilities for two locations, second order requires three locations, and so on. A compact implementation of this method has been implemented by Duarte and Ewins [9]. Their method employs the following relation:…”

Section: Errors Caused By Rotational Degree Of Freedom Truncationmentioning

confidence: 99%

Application of Frequency Domain Substructure Synthesis Technique for Plates loaded with Complex Attachments

Campbell¹,

Hambric²

2004

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“…Another obstacle in using the RC method is in measuring of responses due to rotational degrees of freedom (RDOF). In the structures which carry bending loads, RDOFs have a significant effect on the dynamics of the structure [4]. However, measurement of RDOF responses is technically difficult.…”

Section: Introductionmentioning

confidence: 99%

Prediction of spindle dynamics in milling by sub-structure coupling

Movahhedy

Gerami

2006

International Journal of Machine Tools and Manufacture

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Rotational Degrees of Freedom for Structural Coupling Analysis via Finite-Difference Technique With Residual Compensation

Cited by 60 publications

References 7 publications

Substructure Synthesis Methods and Their Application to Structural-Acoustic Simulations

Substructure Synthesis Methods and Their Application to Structural-Acoustic Simulations

Application of Frequency Domain Substructure Synthesis Technique for Plates loaded with Complex Attachments

Prediction of spindle dynamics in milling by sub-structure coupling

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