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| Comparative study of fluid-filled structure impacted by high-speed spherical fragments based on ALE,CEL and SPH |
| Received:July 07, 2021 Revised:September 25, 2021 |
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| DOI：10.7511/jslx20210707001 |
| KeyWord:fluid-solid interaction impact dynamics ALE method CEL method SPH method numerical simulation |
| Author | Institution |
| 张宇 |
中国飞机强度研究所, 西安 ;结构冲击动力学航空科技重点实验室, 西安 |
| 王彬文 |
中国飞机强度研究所, 西安 ;结构冲击动力学航空科技重点实验室, 西安 |
| 刘小川 |
中国飞机强度研究所, 西安 ;结构冲击动力学航空科技重点实验室, 西安 |
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| Abstract: |
| In order to study the difference of ALE,CEL and SPH methods in the fluid-solid interaction dynamics of high-speed impact,the numerical simulation study on the fluid-filled structure of spherical fragments under high-speed impact was carried out.Based on the verified dynamic model,the fluid pressure change,cavity size,fragment velocity attenuation change and fluid-filled structure deformation were studied respectively.And the corresponding calculation cost was also analyzed.The results show that ALE,CEL and SPH can effectively simulate the fluid-solid interaction dynamic process of the fluid-filled structure under high-speed impact of fragments.Then ALE can predict the cavity size with high accuracy.On the other hand,CEL can predict the fluid pressure,fragment velocity attenuation and fluid-filled structure deformation with high accuracy.But SPH can predict the cavity size and fragment velocity attenuation with high accuracy.When the mesh size is the same,the calculation time of SPH method is about twice those of ALE and CEL methods.However,the pretreatment and post-processing of SPH method are more convenient. |
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