| 楔形底部直升机着水载荷和压力分布的估算方法研究 |
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| 引用本文： | 陈立霞,汪正中,马玉杰.楔形底部直升机着水载荷和压力分布的估算方法研究[J].直升机技术,2014(2):5-9. |
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| 作者姓名： | 陈立霞 汪正中 马玉杰 |
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| 作者单位： | 直升机旋翼动力学重点实验室,江西景德镇333001 |
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| 摘 要： | 基于VonKarman和Wagner的水动力冲击理论，忽略冲击过程中浮力和粘性力的影响，将机身简化为V形楔形体，建立简化的刚体运动方程，对其求解得到楔形底部直升机着水载荷和压力分布估算方法。同时，将理论结果与试验数据进行相关性分析，验证了该方法的合理性。此估算方法适用于直升机的设计水线未被浸入的情况，可以用于楔形底部舰载机直升机的水上迫降载荷计算，为机身结构设计提供依据。
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| 关 键 词： | 直升机 着水载荷 压力分布 结构设计 |
Estimation Method for the Distribution of Ditching Loads and Pressures for Helicopters with V Bottom |
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| Authors: | CHEN Lixia WANG Zhengzhong MA Yujie |
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| Institution: | (Science and Technology on Rotorcraft Aeromechanics Laboratory , Jingdezhen 333001, China) |
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| Abstract: | According to the hydrodynamic impact theory of Von Karman and Wagner, this paper ignored the effects of buoyancy and viscosity during the impact process, and established the simplified rigid motion equations by wedge body. Then the estimation method of ditching loads and pressure distributions were derived. Comparing results between numerical and experiments verified the relia- bility of the proposed method. The method was adapted for the non-chine immersion condition. It was used for ditching loads computation of V-bottom shipboard helicopter. A basis was provided for helicopter fuselage design. |
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| Keywords: | helicopter ditching loads pressure distributions structural design |
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