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RISCandidate Reduced Order Models for Structural Parameter Estimation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper considers the reduction of high order models generated by a finite element analysis. The aim is to provide a low order model which retains the effect of parameter changes and so ...
The Derivatives of Repeated Eigenvalues and Their Associated Eigenvectors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper considers the calculation of eigenvalue and eigenvector derivatives when the eigenvalues are repeated. An extension to Nelson’s method is used to calculate the first order derivatives ...
Steady-State Analysis of Underwater Cables
Publisher: American Society of Civil Engineers
Abstract: This paper considers the equations required to analyze the three-dimensional steady-state configuration of an underwater cable system. Both towed systems and autonomous remotely controlled systems are considered, and the ...
The Effect of Close or Repeated Eigenvalues on the Updating of Model Parameters from FRF Data
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Methods to update the parameters of finite element models using measured vibration data usually use the experimentally derived modal model, that is, the system natural frequencies, damping ...
Modal Analysis of Nonviscously Damped Beams
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Linear dynamics of Euler–Bernoulli beams with nonviscous nonlocal damping is considered. It is assumed that the damping force at a given point in the beam depends on the past history of ...
Structural Health Monitoring and Damage Assessment Using Frequency Response Correlation Criteria
Publisher: American Society of Civil Engineers
Abstract: Two frequency response correlation criteria, namely the global shape correlation (GSC) function and the global amplitude correlation (GAC) function, are established tools to quantify the correlation between predictions ...
Role of Roots of Orthogonal Polynomials in the Dynamic Response of Stochastic Systems
Publisher: American Society of Civil Engineers
Abstract: This paper investigates the fundamental nature of the polynomial chaos (PC) response of dynamic systems with uncertain parameters in the frequency domain. The eigenfrequencies of the extended matrix arising from a PC ...
Physical Realization of Generic-Element Parameters in Model Updating
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The selection of parameters is most important to successful updating of finite element models. When the parameters are chosen on the basis of engineering understanding the model predictions are ...
Combining Subset Selection and Parameter Constraints in Model Updating
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Model updating often produces sets of equations whose solution are ill-conditioned and extra information must be used to produce a well-conditioned estimation problem. One possibility is to change ...
The Identification of the Unbalance of a Flexible Rotating Machine From a Single Rundown
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The reliable estimation of a flexible foundation model and the state of unbalance (both amplitude and phase) of a turbogenerator from machine rundown measured vibration data is an active research ...