Tornado missile transport analysis
A methodology has been developed to simulate the initial release conditions and subsequent motion of objects transported by tornadoes. A probabilistic three-degree-of-freedom trajectory model which includes drag, lift, and side forces has been developed to simulate rigid body dynamics in turbulent t...
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Published in | Nuclear engineering and design Vol. 51; no. 2; pp. 295 - 308 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
1979
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Abstract | A methodology has been developed to simulate the initial release conditions and subsequent motion of objects transported by tornadoes. A probabilistic three-degree-of-freedom trajectory model which includes drag, lift, and side forces has been developed to simulate rigid body dynamics in turbulent tornado flow fields. Comparisons of this random orientation model to results from ballistic three-degree-of-freedom trajectory analysis are presented and the results suggest that the simpler models are potentially unconservative in predicting missile range and impact velocity. A missile injection methodology has also been developed which treats injection as the composite of all missile interactions in the near-ground domain and relies on a restraint force exceedance criterion to initialize missile release relative to the translating tornado. The aerodynamic forces acting on a potential missile during injection suggest a multi-peaked time history which is significantly influenced by missile offset position from the vortex center. A simulation study of missile injection has been performed to determine a conservative range for the assumed horizontal restraining force. |
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AbstractList | A methodology has been developed to simulate the initial release conditions and subsequent motion of objects transported by tornadoes. A probabilistic three-degree-of-freedom trajectory model which includes drag, lift, and side forces has been developed to simulate rigid body dynamics in turbulent tornado flow fields. Comparisons of this random orientation model to results from ballistic three-degree-of-freedom trajectory analysis are presented and the results suggest that the simpler models are potentially unconservative in predicting missile range and impact velocity. A missile injection methodology has also been developed which treats injection as the composite of all missile interactions in the near-ground domain and relies on a restraint force exceedance criterion to initialize missile release relative to the translating tornado. The aerodynamic forces acting on a potential missile during injection suggest a multi-peaked time history which is significantly influenced by missile offset position from the vortex center. A simulation study of missile injection has been performed to determine a conservative range for the assumed horizontal restraining force. |
Author | Dunn, W.L. Davis, T.L. Twisdale, L.A. |
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CitedBy_id | crossref_primary_10_1016_0029_5493_79_90015_3 crossref_primary_10_1016_j_jweia_2003_09_031 crossref_primary_10_1016_j_engstruct_2013_10_010 crossref_primary_10_1016_j_jfluidstructs_2015_02_007 crossref_primary_10_1016_0734_743X_86_90023_0 crossref_primary_10_1016_j_net_2016_12_007 crossref_primary_10_1016_j_jweia_2023_105318 crossref_primary_10_1016_j_jlp_2005_10_002 crossref_primary_10_1016_j_jweia_2006_08_001 crossref_primary_10_1061__ASCE_0733_9445_2007_133_2_274 crossref_primary_10_1016_j_jweia_2020_104358 crossref_primary_10_1016_j_engstruct_2011_11_020 crossref_primary_10_1016_j_jweia_2008_02_060 crossref_primary_10_1061__ASCE_0733_9445_1988_114_10_2190 crossref_primary_10_1016_j_jweia_2005_12_005 crossref_primary_10_1016_j_jweia_2021_104727 crossref_primary_10_1061__ASCE_ST_1943_541X_0000622 crossref_primary_10_1016_j_jweia_2017_06_017 |
Cites_doi | 10.1115/1.3630062 10.2514/3.29067 10.1080/00431672.1970.9932888 |
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Spacecraft doi: 10.2514/3.29067 contributor: fullname: Sentman – volume: 23 start-page: 000 issue: 4 year: 1970 ident: 10.1016/0029-5493(79)90096-7_BIB15 publication-title: Weatherwise doi: 10.1080/00431672.1970.9932888 contributor: fullname: Fujita – year: 1976 ident: 10.1016/0029-5493(79)90096-7_BIB26 contributor: fullname: Marte – year: 1976 ident: 10.1016/0029-5493(79)90096-7_BIB9 publication-title: EPRI 308, Technical Report 1 contributor: fullname: Redmann – year: 1972 ident: 10.1016/0029-5493(79)90096-7_BIB30 contributor: fullname: American National Standards Institute |
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