水陆两栖飞机着滑水动响应分析

Analysis of dynamic response of amphibious aircraft during water-landing and water-skiing

摘要

水陆两栖飞机是一种机身具有船型底部设计特征的特殊飞行器，其水面起降能力和抗浪能力是衡量水陆两栖飞机性能的重要指标。因此，用以改进水陆两栖飞机结构设计的着滑水响应分析是保障飞机水面正常运营，避免结构丧失完整性的关键技术之一。而目前国内公开的着滑水动响应研究中大多均以刚性体假设为主，随着航空技术的持续发展，水陆两栖飞机的柔性逐渐增大，其计算精度逐渐不能满足工程需求。本研究提出了一种水陆两栖飞机着滑水动响应分析方法，基于结构的大变形和流体的强非线性等特点，在规范要求的基础上，同时考虑了飞机机体的弹性以及水载荷的弹性动态效应，为水陆两栖飞机结构设计的优化以及规范条款的完善提供了有力的技术参考。

Abstract

Amphibious aircraft is a special aircraft with hull-type bottom in their fuselage. The ability to take off and land in waves and wave resistance are the important indicators of measuring the performance of amphibious aircraft. Therefore, the analysis of the water-loading and water-skiing response, which is used to improve the structure design of amphibious aircraft, is one of the key technologies to ensure the normal operation on water and avoid the loss of structural integrity. However, in the existing domestic publicly available research on the water dynamic response of water-landing and water-skiing, most of them are based on the rigid body assumption. With the continuous development of aviation technology, the flexibility of amphibious aircraft is gradually increasing, and the calculation accuracy gradually fails to meet engineering requirements. This paper proposes an analysis method for the water dynamic response of amphibious aircraft during water-landing and water-skiing. Based on the characteristics of large structural deformation and strong fluid nonlinearity, and on the basis of specification requirements, it considers both the elasticity of the aircraft body and the elastic dynamic effect of water loads, thus providing strong technical reference for the optimization of the structural design of amphibious aircraft and the improvement of specification clauses.

关键词

水陆两栖飞机 / 结构动力学 / 动响应分析 / 着滑水 / 适航验证

Key words

amphibious aircraft / structural dynamics / dynamic response analysis / water-landing and water-skiing / airworthiness verification

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基金资助

工业和信息化部民用飞机专项科研资助项目(MJZ5-3N21)