• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (14): 179-184.doi: 10.3901/JME.2018.14.179

• 运载工程 • 上一篇    下一篇

民机起落架摆振仿真与虚拟适航验证

何绪飞1,2, 艾剑良1, 宋智桃2   

  1. 1. 复旦大学航空航天系 上海 200443;
    2. 民航上海航空器适航审定中心 上海 200335
  • 收稿日期:2017-10-27 修回日期:2018-01-18 出版日期:2018-07-20 发布日期:2018-07-20
  • 通讯作者: 何绪飞(通信作者),男,1985年出生,博士研究生,高级工程师。主要研究方向为结构动力学、气动弹性。E-mail:hexufei_co@caac.gov.cn
  • 作者简介:艾剑良,男,1965年出生,博士,教授,博士研究生导师,复旦大学航空航天系主任。主要研究方向为飞行器设计、飞行动力学与控制等。E-mail:aijl@fudan.edu.cn;宋智桃,男,1966年出生,研究员,上海审定中心机械系统室主任,C919飞机型号合格审定审查组副组长。主要研究方向为起落架、结构动力学适航审查。E-mail:songzhitao_hd@caac.gov.cn
  • 基金资助:
    民航安全资金资助项目(M011802)。

Shimmy Simulation and Virtual Verification for Civil Aircraft Landing Gear Airworthiness Certification

HE Xufei1,2, AI Jianliang1, SONG Zhitao2   

  1. 1. Department of Aeronautics and Astronautics, Fudan University, Shanghai 200443;
    2. Shanghai Aircraft Airworthiness Certification Center of CAAC, Shanghai 200335
  • Received:2017-10-27 Revised:2018-01-18 Online:2018-07-20 Published:2018-07-20

摘要: 起落架摆振稳定性是现代民机研制和适航认证的重要关注问题。针对民用飞机复杂的前起落架系统,建立三维简化动力学仿真模型,分别模拟不同的摆振试飞场景-典型的摆振滑行速度、重量/重心和跑道障碍物摆振激励方式,开展刚柔耦合起落架结构的摆振特性分析。仿真结果验证飞机起落架在正常构型下的稳定性,分别评估起落架减摆阻尼、轮胎松弛长度和侧偏刚度对摆振稳定特性的影响。通过对适用的中国民航适航规章进行解析,并综合民机型号起落架摆振适航审定实践提出包含摆振适航需求捕获和仿真分析、虚拟试验及物理试验(设备鉴定试验、起落架系统台架试验和摆振试飞)的摆振稳定性验证与适航审定的“积木模型”。实例分析表明运用虚拟验证技术辅助摆振适航验证和符合性判定的可行性。

关键词: 摆振, 结构动力学, 起落架, 适航审定, 虚拟试验

Abstract: Landing gear shimmy is an important issue in modern civil aircraft development and airworthiness certification. For the complex nose landing gear of a civil aircraft, the three-dimensional(3D) simplified dynamic model is developed and shimmy characteristic parameters of the rigid-flexible coupling structures are obtained under different simulated shimmy flight test scenarios-typical taxing speed, weight/center of gravity and runway plank excitation. The landing gear stability in normal configuration is validated. The influence of the shimmy damping, tire relaxation length and cornering stiffness on the stability is analyzed respectively. Interpretation and induction of applicable Chinese Civil Aviation Regulations for shimmy, besides landing gear shimmy airworthiness certification practice are illustrated. A reasonable airworthiness verification and certification "Building Block Model", which includes airworthiness requirements capture, simulation, virtual test and test (equipment qualification test, landing gear system laboratory test and shimmy flight test), is proposed. The civil aircraft shimmy case study demonstrates the feasibility of virtual verification technology to assist the shimmy compliance finding.

Key words: airworthiness certification, landing gear, shimmy, structural dynamics, virtual test

中图分类号: