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RISParametric Instability of a Beam Due to Axial Excitations and to Boundary Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper the stability of the lateral dynamic behavior of a pinned-pinned, clamped-pinned and clamped-clamped beam under axial periodic force or torque is studied. The time-varying parameter ...
Unified Model for Geomaterial Solid/Fluid States and the Transition in Between
Publisher: American Society of Civil Engineers
Abstract: During mudflows, geomaterials evolve in a very specific manner, because initially they behave as solids, and then they turn to flow as viscous fluids. This paper proposes an original approach to simulate, within a single ...
Body Force Modeling of the Fan Stage of a Windmilling Turbofan
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The determination of the rotational speed and massflow of the fan of a turbofan at windmill is critical in the design of the engine-supporting structure and the sizing of the vertical stabilizer. Given the very high bypass ...
Damping in High Transient Motion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An original method for evaluating the dissipative effect in SDOF systems due to the transient phenomenon was presented in a previous article. This method based on the use of an additional ...
Metric Damping of MDOF Systems in High Transient Motion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper deals with damping due to transient motion in the case of multi-degree-of-freedom (MDOF) system. The main aim of this research is to make the method presented by the authors in a ...
Hydromechanical Postclosure Behavior of a Deep Tunnel Taking into Account a Simplified Life Cycle
Publisher: American Society of Civil Engineers
Abstract: This paper addresses the hydromechanical postclosure behavior of an underground long cylindrical deep tunnel drilled into a massif (host medium) and backfilled at the end of its service life. It is concerned with the ...
Permeability due to the Increase of Damage in Concrete: From Diffuse to Localized Damage Distributions
Publisher: American Society of Civil Engineers
Abstract: Experimental tests exhibit a strong interaction between material damage and transport properties of concrete. There are at least two asymptotic cases where some theoretical modeling exists: in the case of diffuse cracking, ...
Theoretical Analysis of the Aerodynamics of Low Speed Fans in Free and Load Controlled Windmilling Operation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present work is a contribution to understanding the windmilling operation of lowspeed fans. Such an operating situation is described in the literature, but the context (mainly windmilling of aeroengines) often involves ...
Assessing Rotation/Curvature Corrections to Eddy-Viscosity Models in the Calculations of Centrifugal-Compressor Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Rotation and curvature (RC) effects on turbulence are expected to impact losses and flow structure in turbomachines. This paper examines two recent eddy-viscosity-model corrections devised to ...
Dynamic Behavior of a Drill-String: Experimental Investigation of Lateral Instabilities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper focuses on laboratory tests concerned with the lateral behavior of a rod representative of part of a drill-string in the area of rotary oil drilling. The original experimental set-up ...