28,698 research outputs found
Computational fluid dynamics-based aero-servo-elastic analysis for gust load alleviation
No full textGust load alleviation using computational fluid dynamics as source of the aerodynamic predictions is carried out in the time domain. To this goal, an aero-servo-elastic reduced order model is generated. The model capitalises on two key aspects: a dimensional reduction through proper orthogonal decomposition, further enhanced via balanced truncation; and an analytically derived mechanism to reproduce the gust effects in the reduced order model. The compact model in state-space form thus obtained was then used for control design synthesis. Assuming information on the structural motion only is accessible for feedback, a linear quadratic regular was designed, first, on the reduced model, and then validated on the large computational model. Resultsare presented for two configurations: an aerofoil and the modified AGARD 445.6 wing, both with a trailing-edge control surface. Studies are presented for the gust response to discrete gusts and continuous turbulence. In particular, for the latter, the standard deviation of the loads and the structural motion was reduced as much as 77%
Chen Chen, 42nd Annual ODU Literary Festival
No full textChen Chen is the author of When I Grow Up I Want to Be a List of Further Possibilities (BOA Editions, 2017), which was long-listed for the National Book Award and won the Thom Gunn Award, among other honors. Bloodaxe Books published a UK edition in June. He is also the author of four chapbooks, most recently You MUST Use the Word Smoothie (Sundress Publications, 2019) and Gesundheit! (in collaboration with Sam Herschel Wein and forthcoming from Glass Poetry Press, fall 2019). His work appears in many publications, including Poem-a-Day, The Massachusetts Review, The Best American Poetry, and The Best American Nonrequired Reading. He has received a Pushcart Prize and fellowships from Kundiman and the National Endowment for the Arts. He holds an MFA from Syracuse University and a PhD from Texas Tech University. He teaches at Brandeis University as the Jacob Ziskind Poet-in-Residence and co-runs the journal, Underblong. He lives in Waltham, Massachusetts, with his partner, Jeff Gilbert, and their pug, Mr. Rupert Gile
Supporting data used in the paper: Xi Chen, 2020, The LMARS based shallow-water dynamical core on generic gnomonic cubed-sphere geometry
No full text# Simulation results of the unstaggered shallow water model
This repository contains the supporting data used in the paper: Xi Chen, 2020, The LMARS based shallow‐water dynamical core on generic gnomonic cubed‐sphere geometry, DOI: 10.1029/2020MS002280
Organization of the repository:
The tar archive with this data submission has a:
doc directory contains a README.md with information regarding naming conventions to label the model configurations for a shallow water test simulation. Additional information can also be found in README.md. Table 4 in the paper provides additional details.
The data directory contains the supporting data files (NetCDF format).Disclaimer: "This was prepared by Xi Chen under award NA18OAR4320123 from the National Oceanic and Atmospheric Administration, U.S. Department of Commerce. The statements, findings, conclusions, and recommendations are those of the author(s) and do not necessarily reflect the views of the National Oceanic and Atmospheric Administration, or the U.S. Department of Commerce.
Artimpaza brevilineata Tian & Chen, 2012 in Tian, Chen & Li 2012
No full textArtimpaza brevilineata Tian & Chen, 2012 in Tian, Chen & Li, 2012: 43, figs. 1–9. (Figs. 28a, b) Type locality: China, Yunnan, Pu’er City, Yutang. Gender: female. Date collected: 2011.V.25 (2010.V.25, in the original description, is incorrect). Collector: Li-Chao TIAN & Gui-Qiang HUANG. Paratypes: 1 female, China, Yunnan, Lincang City, 1980.VI.1, Fen LIU leg. Remarks: In the original description, the type locality is “ Yunnan, Jinghong” while it is “ Yunnan, Yutang” according to the label. “Yutang” is actually in Pu’er, not Jinghong. The first author described the type locality by mistake. In the original description, the collector was only listed as Li-Chao TIAN, which was a mistake.Published as part of Li, Zhu & Chen, Li, 2020, Primary types of longhorned beetles (Coleoptera, Cerambycidae, Vesperidae and Disteniidae) of Southwest University (SWU), pp. 25-46 in Zootaxa 4718 (1) on page 33, DOI: 10.11646/zootaxa.4718.1.2, http://zenodo.org/record/360220
Author contributions
No full textPlease browse the "Files" tag to access the appendix specifying the author - Chen Hsi Tsai's contributions to the seven papers included in the thesis
Ying Chen\u27s Impressions of Summer
No full textChapbook of narrative/personal poems by Ying Chen originally published by Finishing Line Press in 2013. Translated from the French by Peter Schulman, ODU Professor of French and International Studies.https://digitalcommons.odu.edu/worldlanguages_books/1016/thumbnail.jp
Efficient aeroelastic reduced order model with global structural modifications
No full textTime domain aeroelastic analysis has high computing costs when using computational fluid dynamics. These costs become prohibitive when the structural model undergoes large changes from the baseline design, as within an aircraft design process. To overcome this realistic challenge, we have developed, implemented, and demonstrated an efficient method that is robust in the presence of global modifications of the structure. The method consists of: a) a reduced order model of the linearized Navier-Stokes equations generated around an aeroelastic equilibrium that depends, in turn, on the structural model; b) an approximate structural dynamic reanalysis method valid for global modifications of the structure; and c) a mechanism to exchange information between fluid and structural solvers without need for calculating at each iteration of the structural design an eigenvalue problem of the modified structure. The resulting aeroelastic reduced order model is demonstrated for the AGARD 445.6 wing, and material properties are varied up to 100% from their original values. It is found that: a) predictions of the time domain aeroelastic response and of the flutter speed are accurate for all modifications of the structure; and b) the computational efficiency of the proposed aeroelastic reduced order model is linearly proportional to the number of structural configurations considered. The method, therefore, is ideally suited for optimization and uncertainty studies
《在中法之间 — 陈伟农的艺术体验》 Zai Zhong Fa zhi jian: Chen Weinong de yishu tijian / “Between China and France. The Artistic Experience of Chen Weinong”
No full textThe author analizes the artistic production of the Chinese contemporary artist Chen Weinong, who has travelled between China and France for more ten years. In his ink paintings and calligraphies, Chen Weinong reflects the essence of both Western and Eastern cultures, succeeding in refreshing the ancient tradition as well as blazing new trails in Chinese art
Programmatic and performance observations for Two Chamber Works by Chen Yi
No full textAs a Chinese-American composer who was born and reared in China, then studied and settled in the United States, Chen Yi’s success is widely recognized around the world. However, this success is not coincidental and is closely related to her fusion of the Chinese and Western cultures in her works. At the time of this writing, Chen Yi has composed more than forty chamber works, from which the author researched two with the same instrumentation—flute, clarinet, violin, cello, and piano. By understanding Chen Yi’s life experiences and analyzing the theoretical aspects of these compositions, the author gives suggestions for ensemble, timbre, rhythm, pedaling, and performance techniques in these two chamber works by Chen Yi—Happy Rain on a Spring Night and … as like a raging fire
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