放宽静稳定性亚音速大型飞机重心范围设计准则  

Design Criteria for Variable Range of Gravity Center for a Large Subsonic Aircraft with Relaxed Static Stability

作　　者：耿建中[1] 武虎子[1] 段卓毅[1] 

机构地区：[1]中航工业第一飞机设计研究院.西安710089

出　　处：《科技导报》2013年第5期67-71,共5页Science & Technology Review

摘　　要：对比分析了传统自然稳定与放宽静稳定性亚音速大型飞机操纵上的差异,研究了影响放宽静稳定性亚音速飞机重心范围设计的因素,提出了放宽静稳定性亚音速飞机重心范围设计准则,给出了不同影响因素下,平尾相对面积和重心之间的关系式。利用这种关系式,可以绘制出异于传统飞机重心范围设计的"剪刀图"。如果飞机的平尾相对面积给定,则可以很容易确定飞机的重心范围。为了说明所提放宽静稳定性亚音速飞机重心范围设计准则的可行性和可靠性,以某飞机为例,对设计准则进行验证性计算,对影响飞机重心边界确定的重要因素进行仿真分析,通过对计算结果的分析可知,起飞抬前轮和地面滑跑稳定性是影响放宽静稳定性亚音速飞机重心范围设计的主要因素,后期可通过调整起落架位置和设计巡航速度,充分利用性能最佳重心。The controls of the traditional natural stable subsonic large aircraft and the modem subsonic large aircraft with relaxed static stability are analyzed. The design criteria for variable range of the allowable center of gravity are proposed based on demands for the subsonic large aircraft with relaxed static stability and various influencing factors. The relation formulas under different influencing factors between the relative horizontal tail area and the center of gravity are obtained. The curve of the center of gravity against the relative horizontal tail area is found to be different from the traditional ＂scissors figure＂. If the relative horizontal tail area is given, the scope of the center of gravity can be easily determined. To illustrate the feasibility and the reliability of the proposed design standards, a verification calculation is carded out based on a special plane. Through the analysis of the calculation results, the main factors that influence the design of the scope of the center of gravity are obtain, including the initial rotation and the taxi stability. The optimum performance of the center of gravity can be fully used in adjusting the landing gear position and the design cruising speed.

关 键 词：放宽静稳定性 亚音速 飞机 重心 

分 类 号：V221.5[航空宇航科学与技术—飞行器设计]