| Autor: |
LIU Lu, ZHANG Wei, WANG Pengfei |
| Jazyk: |
čínština |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Hangkong gongcheng jinzhan, Vol 13, Iss 4, Pp 162-167 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1674-8190 |
| DOI: |
10.16615/j.cnki.1674-8190.2022.04.19 |
| Popis: |
Large flexible airship is an important platform for“long stay in the air”in near space.It is of important national defense and civil value.It is one of the hotspots in the field of structural engineering of aerostat in recent years.The main airbag is the core structural component of the flexible airship.In order to study the influence of the flow field around the main airbag of the large flexible airship on its modal performance,the air around the main airbag of the flexible airship is assumed as incompressible fluid,adding the influence of air vibrating with the airbag as an additional mass to the capsule structure.The dry and wet modal analysis of the main airbag under 5 different internal pressures is completed by the additional mass calculation method based on the potential flow theory.The first three order of vibration modes and frequencies of the internal pressure of the main airbag at 2、4、6、8 and 10 k Pa is obtained by experiment.The test and analysis results show that:the first 3 order of vibration frequencies of dry and wet mode gradually increase with the increase of internal pressure,under the same internal pressure,the wet modal frequency of the main airbag reduced when considering the influence of the air surrounding the airbag body with the structural vibration. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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