Gust Response Analysis for Helicopter Rotors in the Hover and Forward Flights
Dynamic load due to gust for helicopter rotors directly affects the structural stress and flight performance. In case of gust, it may cause the loss of trust force or the increase of deflection for rotors. In current work, an effective coupled aeroelastic model based on a medium-deflection beam theo...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2017/8986217 |
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| _version_ | 1850219296517521408 |
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| author | Linpeng Wang Yuting Dai Chao Yang |
| author_facet | Linpeng Wang Yuting Dai Chao Yang |
| author_sort | Linpeng Wang |
| collection | DOAJ |
| description | Dynamic load due to gust for helicopter rotors directly affects the structural stress and flight performance. In case of gust, it may cause the loss of trust force or the increase of deflection for rotors. In current work, an effective coupled aeroelastic model based on a medium-deflection beam theory and a nonlinear unsteady aerodynamic model in the time domain were constructed. Three types of gust in vertical direction were added in the model. The dynamic response and structural load for helicopter rotors under three types of gust were calculated, respectively. Results indicated that when rotors suffer a gust in hover at downward direction, the thrust force on rotor disk would decrease significantly when the gust amplitude increases, which should be paid attention in the design. Among the three gust types with the same gust strength, the maximum instantaneous shear force due to impulse shape gust is the largest. When the rotors suffer a gust in a forward flight, the shear force at the root of rotors would increase with the gust strength first but then it decreases. More attention should be paid to the decrease of thrust force and the increase of structural load in a forward flight. |
| format | Article |
| id | doaj-art-7cae483293f84ed9918017c0eeb9ddcb |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-7cae483293f84ed9918017c0eeb9ddcb2025-08-20T02:07:26ZengWileyShock and Vibration1070-96221875-92032017-01-01201710.1155/2017/89862178986217Gust Response Analysis for Helicopter Rotors in the Hover and Forward FlightsLinpeng Wang0Yuting Dai1Chao Yang2School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing 100191, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing 100191, ChinaDynamic load due to gust for helicopter rotors directly affects the structural stress and flight performance. In case of gust, it may cause the loss of trust force or the increase of deflection for rotors. In current work, an effective coupled aeroelastic model based on a medium-deflection beam theory and a nonlinear unsteady aerodynamic model in the time domain were constructed. Three types of gust in vertical direction were added in the model. The dynamic response and structural load for helicopter rotors under three types of gust were calculated, respectively. Results indicated that when rotors suffer a gust in hover at downward direction, the thrust force on rotor disk would decrease significantly when the gust amplitude increases, which should be paid attention in the design. Among the three gust types with the same gust strength, the maximum instantaneous shear force due to impulse shape gust is the largest. When the rotors suffer a gust in a forward flight, the shear force at the root of rotors would increase with the gust strength first but then it decreases. More attention should be paid to the decrease of thrust force and the increase of structural load in a forward flight.http://dx.doi.org/10.1155/2017/8986217 |
| spellingShingle | Linpeng Wang Yuting Dai Chao Yang Gust Response Analysis for Helicopter Rotors in the Hover and Forward Flights Shock and Vibration |
| title | Gust Response Analysis for Helicopter Rotors in the Hover and Forward Flights |
| title_full | Gust Response Analysis for Helicopter Rotors in the Hover and Forward Flights |
| title_fullStr | Gust Response Analysis for Helicopter Rotors in the Hover and Forward Flights |
| title_full_unstemmed | Gust Response Analysis for Helicopter Rotors in the Hover and Forward Flights |
| title_short | Gust Response Analysis for Helicopter Rotors in the Hover and Forward Flights |
| title_sort | gust response analysis for helicopter rotors in the hover and forward flights |
| url | http://dx.doi.org/10.1155/2017/8986217 |
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