Modeling Traveling Waves Using Mode Superposition
Analysis of the data from two Vortex-Induced Vibration (VIV) experiments conducted in the Gulf Stream on a 500-foot-long, 1.43 inches diameter, flexible, tension dominated riser model revealed that the response is predominantly characterized by the presence of traveling waves. It was also observed t...
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| Format: | Article |
| Language: | en_US |
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American Society of Mechanical Engineers
2017
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| Online Access: | http://hdl.handle.net/1721.1/109293 https://orcid.org/0000-0002-9828-9484 https://orcid.org/0000-0002-6144-660X |
| _version_ | 1826211114605608960 |
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| author | Jaiswal, Vivek Sheshadri, Aditi Vandiver, John Kim |
| author2 | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics |
| author_facet | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Jaiswal, Vivek Sheshadri, Aditi Vandiver, John Kim |
| author_sort | Jaiswal, Vivek |
| collection | MIT |
| description | Analysis of the data from two Vortex-Induced Vibration (VIV) experiments conducted in the Gulf Stream on a 500-foot-long, 1.43 inches diameter, flexible, tension dominated riser model revealed that the response is predominantly characterized by the presence of traveling waves. It was also observed that the location of the VIV excitation region (power-in) affects the characteristics of the response. The conventional method of modeling the excitation force as a standing wave was found inadequate to predict the location of the peak measured response accurately, especially in the cases where the excitation region is close to a boundary (the ends of the riser model). A modified excitation force model consisting of a combination of standing and traveling wave excitation regions is demonstrated to predict the location of the peak response more accurately. This work presents the idea of modifying the VIV excitation model to include traveling wave characteristics and using mode superposition method for computing the response to this modified force. Examples of the implementation of this method are shown for the two distinct cases of the location of the power-in region — the power-in region adjacent to the boundary and the power-in region away from the boundary. Depending on the location of the power-in region, different proportions of standing and traveling wave excitations are used to yield predicted responses that match the measured response characteristics. |
| first_indexed | 2024-09-23T15:01:07Z |
| format | Article |
| id | mit-1721.1/109293 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:01:07Z |
| publishDate | 2017 |
| publisher | American Society of Mechanical Engineers |
| record_format | dspace |
| spelling | mit-1721.1/1092932022-09-29T12:05:32Z Modeling Traveling Waves Using Mode Superposition Jaiswal, Vivek Sheshadri, Aditi Vandiver, John Kim Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology. Department of Mechanical Engineering Massachusetts Institute of Technology. Department of Ocean Engineering Jaiswal, Vivek Sheshadri, Aditi Vandiver, John Kim Analysis of the data from two Vortex-Induced Vibration (VIV) experiments conducted in the Gulf Stream on a 500-foot-long, 1.43 inches diameter, flexible, tension dominated riser model revealed that the response is predominantly characterized by the presence of traveling waves. It was also observed that the location of the VIV excitation region (power-in) affects the characteristics of the response. The conventional method of modeling the excitation force as a standing wave was found inadequate to predict the location of the peak measured response accurately, especially in the cases where the excitation region is close to a boundary (the ends of the riser model). A modified excitation force model consisting of a combination of standing and traveling wave excitation regions is demonstrated to predict the location of the peak response more accurately. This work presents the idea of modifying the VIV excitation model to include traveling wave characteristics and using mode superposition method for computing the response to this modified force. Examples of the implementation of this method are shown for the two distinct cases of the location of the power-in region — the power-in region adjacent to the boundary and the power-in region away from the boundary. Depending on the location of the power-in region, different proportions of standing and traveling wave excitations are used to yield predicted responses that match the measured response characteristics. DeepStar (Consortium) United States. Office of Naval Research. Ocean Engineering and Marine Systems Program SHEAR7 JIP 2017-05-23T15:16:36Z 2017-05-23T15:16:36Z 2010-06 Article http://purl.org/eprint/type/ConferencePaper 978-0-7918-4909-5 http://hdl.handle.net/1721.1/109293 Jaiswal, Vivek, Aditi Sheshadri, and J. Kim Vandiver. “Modeling Traveling Waves Using Mode Superposition.” 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 1 (2010). https://orcid.org/0000-0002-9828-9484 https://orcid.org/0000-0002-6144-660X en_US http://dx.doi.org/10.1115/OMAE2010-20807 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 1 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Society of Mechanical Engineers American Society of Mechanical Engineers (ASME) |
| spellingShingle | Jaiswal, Vivek Sheshadri, Aditi Vandiver, John Kim Modeling Traveling Waves Using Mode Superposition |
| title | Modeling Traveling Waves Using Mode Superposition |
| title_full | Modeling Traveling Waves Using Mode Superposition |
| title_fullStr | Modeling Traveling Waves Using Mode Superposition |
| title_full_unstemmed | Modeling Traveling Waves Using Mode Superposition |
| title_short | Modeling Traveling Waves Using Mode Superposition |
| title_sort | modeling traveling waves using mode superposition |
| url | http://hdl.handle.net/1721.1/109293 https://orcid.org/0000-0002-9828-9484 https://orcid.org/0000-0002-6144-660X |
| work_keys_str_mv | AT jaiswalvivek modelingtravelingwavesusingmodesuperposition AT sheshadriaditi modelingtravelingwavesusingmodesuperposition AT vandiverjohnkim modelingtravelingwavesusingmodesuperposition |