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RISAn Analytical Model for Thermoelastic Damping in Microresonators Based on Entropy Generation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents an analytical model for thermoelastic damping (TED) in micromechanical resonators, which is based on entropy generation, a thermodynamic parameter measuring the irreversibility in heat conduction. The ...
Solving Differential Algebraic Equation Systems: Alternative Index 2 and Index 1 Approaches for Constrained Mechanical Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Regarding constrained mechanical systems, we are faced with index3 differentialalgebraic equation (DAE) systems. Direct discretization of the index3 DAE systems only enforces the position constraints to be fulfilled at the ...
Multiscale-Kolmogorov–Arnold Network Surrogate Modeling Approach for Dynamic Stiffness Prediction of a Heavy-Duty Gas Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The flexibility of the casing plays an important role in the dynamic response of the gas turbine rotor. The effect of the support parameters on the dynamic stiffness of the supporting components must be considered. While ...
Nonlinear Dynamics of the Rod Fastened Jeffcott Rotor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Rodfastened rotors are composed of some disks clamped together by a central tie rod or several tie rods distributed along the circumference. Due to the nonlinear flexural stiffness of the contact interfaces in disks, ...
Explicit and Implicit Cosimulation Methods: Stability and Convergence Analysis for Different Solver Coupling Approaches
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The numerical stability and the convergence behavior of cosimulation methods are analyzed in this manuscript. We investigate explicit and implicit coupling schemes with different approximation orders and discuss three ...
Physics-Informed Neural Network for Thermal Analysis of Space Structure
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: External heat flux often induces deformation or vibration in space structures comprised of thin-walled tubes. Efficient and real-time thermal-structural dynamic analysis is essential for the reliable operation and optimal ...
The Elastohydrodynamic Traction of a Grease LGLT2
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The elastohydrodynamic (EHD) traction coefficients of a lubricating grease LGLT2 were tested at various loads and rolling speeds on a selfmade test rig. Traction coefficient versus slidetoroll ratio curves were generated. ...
Stabilized Implicit Cosimulation Method: Solver Coupling With Algebraic Constraints for Multibody Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this manuscript, an implicit cosimulation method is analyzed, where the solvers are coupled by algebraic constraint equations. We discuss cosimulation approaches on index2 and on index1 level and investigate constant, ...
Thermoelastic Damping in Asymmetric Three Layered Microbeam Resonators
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Thermoelastic damping (TED) has been recognized as a significant mechanism of energy loss in vacuumoperated microresonators. Threelayered microbeams are common elements in many microresonators. However, only the model for ...
Numerical and Experimental Investigations on Preload Effects in Air Foil Journal Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A detailed elastogasdynamic model of a preloaded three-pad air foil journal bearing is presented. Bump and top foil deflections are herein calculated with a nonlinear beamshell theory according to Reissner. The two-dimensional ...