| Citation: | Feng Mingyu, Zhao Heming, Fan Kai, et al. Effects of overload on the overturning behavior of metal diaphragm[J]. Journal of Aerospace Power, 2026, 41(10):20250052 doi: 10.13224/j.cnki.jasp.20250052 |
To study the effect of overload on the overturning behavior of metal diaphragm, the rule of centroid offset during the overturning process of metal diaphragm was deeply investigated by numerical simulations and experimental verification, and a stiffened-structure diaphragm which can control centroid offset was designed. According to the research in the study, the following conclusions can be drawn: when the axis of the diaphragm is consistent with the direction of overload, the turning edge of the diaphragm is subject to uniform back pressure, resulting in no significant centroid offset of the diaphragm when the diaphragm turns to the cone section, but a centroid offset will occur when it flips to the spherical section. When there is an angle between the axis of the diaphragm and the overload direction, the turning edge of the diaphragm is subjected to inconsistent back pressure, resulting in centroid offset of the diaphragm when the diaphragm flips to the cone section, and the centroid offset is further aggravated when it turns to the the spherical section. In addition, an increase in the acceleration value or angle will result in a greater degree of centroid offset for the diaphragm. Compared with the traditional diaphragm, the stiffened-structure diaphragm can correct centroid offset caused by the overload discharge through the additional initial pressure provided by its stiffened structure, thereby demonstrating superior centroid control capability.
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