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Title: Response of Jointed-Structures in a Shock Tube: Simultaneous PSP and DIC with Comparison to Modeling

Abstract

Experiments, modeling and simulation were used to study the nonlinear dynamics of a jointed-structure in a shock tube. The structure was a full-span square cylinder with internal bolted connections excited by fluid loading. The width-based Reynolds number was ≈10 5. The cylinder was exposed to an impulsive force associated with the incident shock followed by transverse loading imposed by vortex shedding. In the experiment, aerodynamic loading was characterized with high-speed pressure sensitive paint (PSP). Digital image correlation (DIC) concurrently measured the structural response. The maximum displacement occurred when the vortex shedding frequency most closely matched the structural mode of the beam associated with a rocking motion at the joint. A finite element model was developed using Abaqus, where the nonlinear contact dynamics of the joint were simulated using Coulomb friction. The PSP data loaded the model and the interaction was treated as one-way coupled. The simulations well-matched the trends observed in the experiment. Overall, the root-mean-square values of the transverse displacement agreed to within 24% of the experiment. The modeling showed rocking about the joint during vortex shedding was critical to the nonlinear damping and energy dissipation in the structure. We conclude this campaign highlights the importance of jointed-connections tomore » energy dissipation in structures under aerodynamic loading.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of Akron, OH (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1581979
Report Number(s):
SAND-2019-12494J
Journal ID: eISBN; 978-1-62410-589-0; 680397
DOE Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Conference
Resource Relation:
Conference: AIAA Aviation 2019 Forum, Dallas, TX (United States), 17-21 Jun 2019
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Lynch, Kyle Patrick, Jones, Elizabeth M. C., Brink, Adam Ray, Roettgen, Daniel R., Kuether, Robert J., Wagner, Justin L., Mathis, Allen, Quinn, Donald Dane, and Rohe, Daniel Peter. Response of Jointed-Structures in a Shock Tube: Simultaneous PSP and DIC with Comparison to Modeling. United States: N. p., 2019. Web. doi:10.2514/6.2019-3654.
Lynch, Kyle Patrick, Jones, Elizabeth M. C., Brink, Adam Ray, Roettgen, Daniel R., Kuether, Robert J., Wagner, Justin L., Mathis, Allen, Quinn, Donald Dane, & Rohe, Daniel Peter. Response of Jointed-Structures in a Shock Tube: Simultaneous PSP and DIC with Comparison to Modeling. United States. doi:10.2514/6.2019-3654.
Lynch, Kyle Patrick, Jones, Elizabeth M. C., Brink, Adam Ray, Roettgen, Daniel R., Kuether, Robert J., Wagner, Justin L., Mathis, Allen, Quinn, Donald Dane, and Rohe, Daniel Peter. Fri . "Response of Jointed-Structures in a Shock Tube: Simultaneous PSP and DIC with Comparison to Modeling". United States. doi:10.2514/6.2019-3654.
@article{osti_1581979,
title = {Response of Jointed-Structures in a Shock Tube: Simultaneous PSP and DIC with Comparison to Modeling},
author = {Lynch, Kyle Patrick and Jones, Elizabeth M. C. and Brink, Adam Ray and Roettgen, Daniel R. and Kuether, Robert J. and Wagner, Justin L. and Mathis, Allen and Quinn, Donald Dane and Rohe, Daniel Peter},
abstractNote = {Experiments, modeling and simulation were used to study the nonlinear dynamics of a jointed-structure in a shock tube. The structure was a full-span square cylinder with internal bolted connections excited by fluid loading. The width-based Reynolds number was ≈105. The cylinder was exposed to an impulsive force associated with the incident shock followed by transverse loading imposed by vortex shedding. In the experiment, aerodynamic loading was characterized with high-speed pressure sensitive paint (PSP). Digital image correlation (DIC) concurrently measured the structural response. The maximum displacement occurred when the vortex shedding frequency most closely matched the structural mode of the beam associated with a rocking motion at the joint. A finite element model was developed using Abaqus, where the nonlinear contact dynamics of the joint were simulated using Coulomb friction. The PSP data loaded the model and the interaction was treated as one-way coupled. The simulations well-matched the trends observed in the experiment. Overall, the root-mean-square values of the transverse displacement agreed to within 24% of the experiment. The modeling showed rocking about the joint during vortex shedding was critical to the nonlinear damping and energy dissipation in the structure. We conclude this campaign highlights the importance of jointed-connections to energy dissipation in structures under aerodynamic loading.},
doi = {10.2514/6.2019-3654},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}

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