A new approach to modal-based structural dynamic model updating and joint identification

Nobari, A.S.; Robb, David A.; Ewins, D. J.

doi:10.1006/mssp.1995.0007

Cited by 22 publications

(16 citation statements)

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“…In order to be able to identify dynamic mechanical properties (loss factors and moduli) of a structural adhesive material, the method introduced by Nobari et al [14] for identification of undamped material properties is modified as follows:…”

Section: Modified Modal Based Adaptive Direct Methodsmentioning

confidence: 99%

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Identification of Damping Characteristic of a Structural Adhesive by Extended Modal Based Direct Model Updating Method

Nobari

Jahani

2008

Exp Mech

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In order to identify damping characteristics (loss factors in bending and shear modes versus frequency) of an adhesive material, modal based direct model updating method used in previous paper (Jahani and Nobari, Exp Mech, 48:2008) is modified here. Two approaches adopted in the identification process. In the first one, the pre identified moduli from undamped model were used in identification of loss factors and in the second approach loss factors and moduli are identified simultaneously. The loss factors of a typical adhesive were identified using both approaches leading to acceptable results in both cases. The results show that loss factors and Young's and shear moduli of adhesive are frequency dependent. All experiments and subsequent identifications are conducted both in bending and shear modes. The repeatability and consistency of method is proved by repeating the identification process for several times.

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Section: Modified Modal Based Adaptive Direct Methodsmentioning

confidence: 99%

“…In this paper, the same technique will be used to identify the damping characteristics of a structural adhesive. In this respect, it is necessary to modify and extend the formulation of the direct modal based model updating method [14] as the original formulation does not cover the damping effect. This task will be undertaken first.…”

Section: Introductionmentioning

confidence: 99%

Identification of Damping Characteristic of a Structural Adhesive by Extended Modal Based Direct Model Updating Method

Nobari

Jahani

2008

Exp Mech

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“…The impact of this truncation error, however, can be indirectly accessed: a converged solution should indicate that the truncation error is negligible. The validity of this truncated version of modal expansion was previously demonstrated for dynamic analyses [22,23] and model updating as well [10].…”

Section: A New Formulation For Identification Of Joint Stiffnessesmentioning

confidence: 93%

“…There is a variety of techniques available for solving equation (10). Here, for example, the Newton}Raphson method will be used.…”

Section: A New Formulation For Identification Of Joint Stiffnessesmentioning

confidence: 99%

A New Method for Structural Model Updating and Joint Stiffness Identification

Li¹

2002

Mechanical Systems and Signal Processing

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“…In this study, identification of dynamic characteristics of an adhesive material is undertaken using the modal based direct method introduced by Nobari et al [12].…”

Section: Introductionmentioning

confidence: 99%

Identification of Dynamic (Young’s and Shear) Moduli of a Structural Adhesive Using Modal Based Direct Model Updating Method

Jahani

Nobari

2008

Exp Mech

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In this paper, mechanical characteristics (Young's modulus and shear modulus) of an adhesive are identified using modal based direct model updating method and experimental modal data. The results show that both Young's and shear moduli of adhesive are frequency dependent. Also, it is demonstrated that the thickness and length of the adhesive-line have influence on these properties. All experiments and subsequent identifications are conducted both in bending and shear modes, and it has been shown that the shear modulus of adhesive is more sensitive to length and thickness variations. The repeatability and consistency of method is proved through repeating the process several times and with different adherends.

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A new approach to modal-based structural dynamic model updating and joint identification

Cited by 22 publications

References 0 publications

Identification of Damping Characteristic of a Structural Adhesive by Extended Modal Based Direct Model Updating Method

Identification of Damping Characteristic of a Structural Adhesive by Extended Modal Based Direct Model Updating Method

A New Method for Structural Model Updating and Joint Stiffness Identification

Identification of Dynamic (Young’s and Shear) Moduli of a Structural Adhesive Using Modal Based Direct Model Updating Method

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