【作者】 丁燕芳；

【导师】 胡胜海；

【作者基本信息】 哈尔滨工程大学 ， 机械设计及理论， 2005， 硕士

【摘要】 直升机是以动力驱动的旋翼作为主要升力来源,能垂直起落的重于空气的航空器。直升机旋翼是直升机的核心部件,对直升机的机动性、操纵性、速度、振动水平、寿命、安全性及维护性等有着巨大的影响。因此世界各国都把直升机的旋翼技术当作直升机的关键技术来研制。 直升机之所以能垂直起降、空中悬停、飞行方向自由,全靠它的旋翼。旋翼的空气动力特性决定着直升机的性能和飞行品质,也是直升机的振动和噪声的主要根源。直升机旋翼出现的问题而导致的直升机事故在直升机事故总数中占重要部分。为此需要建立一套有效的测试平台来保证旋翼的质量。直升机旋翼试验台是目前国内外使用广泛的一种直升机旋翼测试方法。直升机旋翼动平衡试验台主要用于对旋翼在悬停状态下的气动、动力学、飞行力学等问题进行试验研究,并通过试验测试保证旋翼组的动态平衡,为旋翼的理论研究提供试验验证手段。 本文的主要工作就是在考虑外力条件与温度环境等因素的影响下,进行直升机旋翼动平衡试验台台体架系统结构设计;然后建立台体架系统的有限元模型,运用有限元分析方法对台体架进行比较全面的分析,计算在不同的载荷作用下结构形变,台体架系统的振动与响应特性,并对台体架系统受温度场的影响和在温度场与力的共同作用下的应力应变进行分析,对台体架结构的进一步设计与改进提供一定的理论参考。更多还原

【Abstract】 A Helicopter is a mechanical flying device that uses rotating wings to achieve lift. Rotary wing is key components of helicopter and major factor of the performance of helicopter. As key technology, the rotary wing technology is developing by the nations of the world.Aerodynamic characteristics of helicopter rotor are the deciding factor of performance and quality of helicopter. The rotor is also the main source of vibration and noise. Accidents which caused by rotary wing failures are major part of helicopter accidents. For reasons above, it is necessary to build an effective experimental platform to guarantee the quality of rotors. Dynamic balancing experimental platform of helicopter is mainly used in the research of aerodynamics of rotary wings. By testing, the platform can also guarantee the dynamic balance of rotor.The theme of this paper is structure design of dynamic balancing experiment platform of helicopter under the influence of loads, temperature and so on and the associated computer-aided analysis. The analysis is mainly about deformation of structure, vibration and response characteristics of platform, relations between load and deformation under the influence of temperature. It is able to provide information for further improving and optimizing.更多还原