|
| Calculation and Analysis of Dynamic Response Characteristics of Thin-walled Metal Structures under Multiple Physical Field Loads |
| Received:August 08, 2024 Revised:September 07, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.09.010 |
| KeyWord:thin-walled structures buckling modes response characteristics fatigue life rainflow damage |
| Author | Institution |
| TAN Ran |
School of Aero-engine, Shenyang Aerospace University, Shenyang , China |
| SHA Yundong |
School of Aero-engine, Shenyang Aerospace University, Shenyang , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to investigate the nonlinear dynamic response problem of thermal components in aero-engines under multiple physical field loads. Based on the experimental and simulation verification calculation methods of rectangular thin-walled structures under multiple physical field loads, the modal trend of a thin-walled structure under different temperature conditions was analyzed and calculated and the buckling temperature of the thin-walled structure was calculated. The response of the thin-walled structure under the combined of different temperature loads and different sound pressure levels under an external flow field of 150 m/s was studied. The improved rainflow counting method and the Morrow average stress model were used to estimate the fatigue life of the structure. When the buckling coefficients were 0.5 and 1.1, the stress response was triggered to its maximum peak at the first fundamental frequency. When the buckling coefficient was 1.1, the damage amplitude of the thin-walled structure increased compared to that when the buckling coefficient was 0.5. As the sound pressure level reached 160 dB, the rainflow damage matrix cyclic block at the buckling coefficient of 1.1 began to distribute along the secondary diagonal. Under the same sound pressure level, as the temperature increases, the fatigue life of the structure decreases. At the same temperature, as the sound pressure level continues to increase, the fatigue life of each buckling coefficient shows a linear decreasing trend. |
| Close |
|
|
|