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Finite Element Model Updating in Structural Dynamics
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TLDR
A comparison of Numerical Data with Test Results and Iterative Methods Using Modal Data for Model Updating shows that the former is more accurate than the latter.Abstract:
Preface. 1. Introduction. 2. Finite Element Modelling. 3. Vibration Testing. 4. Comparing Numerical Data with Test Results. 5. Estimation Techniques. 6. Parameters for Model Updating. 7. Direct Methods Using Modal Data. 8. Iterative Methods Using Modal Data. 9. Methods Using Frequency Domain Data. 10. Case Study: an Automobile Body M. Brughmans, J. Leuridan, K. Blauwkamp. 11. Discussion and Recommendations. Index.read more
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Model updating of periodic structures based on free wave characteristics
TL;DR: The proposed model updating procedure is demonstrated and validated by a numerical case study involving a repetitive frame structure and by an experiment on a four-storey steel frame structure, confirming the feasibility of model updating based on free wave characteristics for repetitive structures.
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Studies in dynamic design using updated models
TL;DR: In this article, a finite element model of a structure is updated to predict the effects of structural modifications in terms of mass and beam modifications, and the suitability of updated models for predicting the effect of structural modification is evaluated by some computer and laboratory experiments.
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The matrix nearness problem associated with the quaternion matrix equation AXA H +BYB H =C
TL;DR: In this article, the authors derived the expression of Hermitian solution for the matrix nearness problem associated with the quaternion matrix equation AXAH+BYBH=C by making use of the CCD-Q, GSVD-Q and the projection theorem in the finite dimensional inner product space.
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Quadratic inverse eigenvalue problem for damped gyroscopic systems
Jiang Qian,Mingsong Cheng +1 more
TL;DR: The quadratic inverse eigenvalue problem for damped gyroscopic systems is discussed, that is, to construct a damped Gyroscopic second order system having given 2n eigenvalues and associated eigenvectors as its full eigenstructure under some mild assumptions.
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Calculation of eigenpair derivatives for symmetric quadratic eigenvalue problem with repeated eigenvalues
TL;DR: In this article, the derivatives of the semisimple eigenvalues and corresponding eigenvectors of symmetric quadratic eigenvalue problem are divided into a particular solution and a homogeneous solution; a simplified method is given to calculate the particular solution by solving a linear system with nonsingular coefficient matrix.