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RISPrediction of 2‐D Bed Topography in Rivers
Publisher: American Society of Civil Engineers
Abstract: Mathematical models are being developed at the Delft Hydraulics Laboratory for the computation of time‐dependent, two‐dimensional bed deformation in alluvial rivers. A most promising verification of the predictive capacity ...
Causal Hysteretic Element
Publisher: American Society of Civil Engineers
Abstract: In this paper the “causal hysteretic element” is constructed and analyzed. The dynamic stiffness of the proposed hysteretic model has the same imaginary part as the “ideal” hysteretic damper, but has the appropriate real ...
Viscous Heating of Fluid Dampers. I: Small-Amplitude Motions
Publisher: American Society of Civil Engineers
Abstract: The problem of viscous heating of fluid dampers is examined in this paper at the limit of small-amplitude motions where the heat transfer equation becomes linear. At this limit, a one-dimensional energy equation expressed ...
Stiffness, Flexibility, Impedance, Mobility, and Hidden Delta Function
Publisher: American Society of Civil Engineers
Abstract: In this paper, the basic transfer functions and time-response functions of linear phenomenological models are revisited. The relation between the analyticity of a transfer function and the causality of the corresponding ...
Plastic Torsional Buckling of Cruciform Compression Members
Publisher: American Society of Civil Engineers
Abstract: In this paper the plastic torsional buckling of a cruciform column is revisited. The interest in this classical problem resurfaced from a practical application in the area of seismic protection of structures. The theoretical ...
Impedance Function of Piles in Inhomogeneous Media
Publisher: American Society of Civil Engineers
Basic Response Functions of Simple Inertoelastic and Inertoviscous Models
Publisher: American Society of Civil Engineers
Abstract: Motivated by the growing interest in suppressing vibrations with supplemental rotational inertia, this paper examines and constructs the basic frequency-response functions and subsequently derives the corresponding causal ...
Equilibrium Violation From the Complex Stiffness
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Evidence from cyclic tests on metals, elastomers, and sandy soils reveals that damping forces are nearly rate-independent and structural (hysteretic or rate-independent) damping was widely adopted since the 1940s. While ...
Parameters for Assessing Oil Reservoir Water Flooding Additives
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper is concerned with deriving parameters for assessing the effectiveness of fluid additives to improve water flooding during enhanced oil recovery. We focus particularly on the use of ...
Parker-Type Acoustic Resonances in the Return Guide Vane Cascade of a Centrifugal Compressor – Theoretical Modeling and Experimental Verification
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The potential of acoustic resonances within vane arrays of turbomachinery has been known since the fundamental investigations of Parker back in the sixties and seventies. In his basic studies ...