Modal analysis of twisted and curved blades using geometrically exact, intrinsic equations and general boundary conditions
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Bibliographic record
Abstract
View Video Presentation: https://doi.org/10.2514/6.2023-1705.vid This paper presents a finite-difference method for structural dynamics analysis of initially twisted and curved beams with typical boundary conditions. The geometrically exact intrinsic formulation provides a set of nonlinear first-order partial differential equations that can be used for structural dynamic analysis of beams with initial twist or curvatures. These equations of motion are discretized in space domain using a central difference discretization scheme. Boundary conditions related to the displacements and rotations are introduced as intrinsic expressions in terms of the curvatures and strains. In this work, the general formulation is exemplified for a selected statically indeterminate case. An eigenfrequency analysis is done for a twisted blade under various boundary conditions and the results are verified against the corresponding modal analysis performed in ANSYS Workbench. However, the approach can deal with various combinations of typical rotating blades boundary conditions and can be used together with the geometrically exact, fully intrinsic equations in the structural analysis of statically indeterminate cases.
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Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.005 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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