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RISAnalysis of the Synchronous Response of Rotor Components by Wavelet Transform and Wavelet Probing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The measured synchronous response of rotor components may be analyzed with two objectives. On the one hand, the estimation of the response amplitude is necessary for structural calculations such as the assessment of the ...
Effects of the Geometric Uncertainties of Bladed Disks Through the Analytical Derivatives of the Finite Element Matrices
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Manufacturing processes and wear are known to create imperfections in mechanical components that may result in a significant deviation of the modal properties from their predicted values. This is especially true for periodic ...
Processing Multicomponent Blade Tip Timing Experimental Data by Independent Component Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Blade tip timing (BTT) is a simple, robust, and nonintrusive method for measuring the rotor blade vibrations in turbomachinery. Using this method, the analysis of vibrations characterized by multiple spectral components ...
Human-Induced Vibrations on Two Lively Footbridges in Milan
Publisher: American Society of Civil Engineers
Abstract: This article describes the results of extensive full-scale experiments carried out on two lively footbridges recently built in Milan, Italy. The objective of the study was to assess the dynamic characteristics of the bridges ...
Interface Reduction in Craig–Bampton Component Mode Synthesis by Orthogonal Polynomial Series
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The component mode synthesis (CMS) based on the Craig–Bampton (CB) method has two strong limitations that appear when the number of the interface degrees-of-freedom (DOFs) is large. First, the reduced-order model (ROM) ...
Modeling Nonlinear Systems by Volterra Series
Publisher: American Society of Civil Engineers
Abstract: The Volterra-series expansion is widely employed to represent the input-output relationship of nonlinear dynamical systems. This representation is based on the Volterra frequency-response functions (VFRFs), which can either ...
Modal Identification of Bladed Disks by Time–Frequency Analysis of the Nonsynchronous Response
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In some circumstances, it is impossible to exploit resonance crossings to identify the modal properties of rotor disks. In these cases, the identification process must rely on nonsynchronous vibrations and becomes challenging ...
Human-Induced Vibrations on Two Lively Footbridges in Milan
Publisher: American Society of Civil Engineers
Abstract: This article describes the results of extensive full-scale experiments carried out on two lively footbridges recently built in Milan, Italy. The objective of the study was to assess the dynamic characteristics of the bridges ...
Double Modal Transformation and Wind Engineering Applications
Publisher: American Society of Civil Engineers
Abstract: Modal transformation techniques are usually adopted in structural dynamics with the aim of decoupling the equations of motion. They are based on the search for an abstract space in which the solution of the problem results ...
Nonlinear Aerodynamic and Aeroelastic Analysis of Bridges: Frequency Domain Approach
Publisher: American Society of Civil Engineers
Abstract: A frequency domain approach for nonlinear bridge aerodynamics and aeroelasticity, based on the Volterra series expansion, is introduced in this paper. The Volterra frequency-response functions and the associated linear ...