# 飞机担架结构强度安全分析和仿真Safety Analysis and Simulation of the Strength of Aircraft Stretcher Structure

DOI: 10.12677/CSA.2020.103043, PDF, HTML, XML, 下载: 209  浏览: 400

Abstract: In this paper, finite element preprocessing software HyperMesh is used to preprocess the aircraft stretcher and establish the finite element model. According to the design standard of stretcher structure strength, the static strength characteristics, impact strength characteristics and fatigue strength characteristics of the stretcher are analyzed and studied by using the finite element analysis software ANSYS to realize the simulation design of aircraft stretcher structure strength. This method has certain reference value for the research design and simulation analysis of aircraft stretcher.

1. 绪论

2. 担架模型的建立

2.1. 飞机担架有限元模型的建立

Figure 1. Finite element model of aircraft stretcher

2.2. 试验载荷数据

Table 1. Estimated load of stretcher in each direction

3. 担架静强度分析

3.1. 担架下压加载静强度分析

Figure 2. Boundary conditions and load setting diagram of stretcher

(a) (b) (c)

Figure 3. Deformation distribution, strain distribution and Mises stress distribution nephogram of stretcher downward loading

3.2. 担架向前加载静强度分析

Figure 4. Boundary conditions and load setting diagram of stretcher forward loading

(a) (b) (c)

Figure 5. Deformation distribution, strain distribution and Mises stress distribution nephogram of stretcher forward loading

4. 担架冲击强度分析

Figure 6. Boundary conditions and loading settings for dynamic analysis of stretcher

(a) (b)

Figure 7. Stress distribution and deformation distribution nephogram under impact condition of stretcher

5. 担架疲劳强度分析

(1)

5.1. 担架向下加载疲劳强度分析

(a) (b) (c)

Figure 8. Fatigue life, damage distribution and safety factor distribution nephogram of stretcher downward loading

5.2. 担架向前加载疲劳强度分析

(a) (b) (c)

Figure 9. Fatigue life, damage distribution and safety factor distribution nephogram of stretcher forward loading

6. 担架优化

1) 更改承力结构的材料

2) 加强主要承力结构

7. 小结

 [1] 李风杰, 甘银银. 民用航空担架的研究及发展探讨[J]. 军民两用技术与产品, 2018(19): 54-58. [2] 任永锋, 严玲. 民用飞机机体连接结构动刚度计算分析及试验验证[J]. 装备环境工程, 2018, 15(9): 32-36. [3] 胡学文, 李艳军, 曹愈远, 等. 有限元分析在直升机医疗构型更改中的研究[J]. 航空计算技术, 2019, 49(4): 76-83. [4] Hou, Y.L., Yao, J.T. and Zeng, D.X. (2009) Development and Calibration of a Hyper Static Six-Component Force/Torque Sensor. Chinese Journal of Mechanical Engineering, 22, 505-513. https://doi.org/10.3901/CJME.2009.04.505 [5] 费伊, 李法林, 陈立雄, 等. 一种通用型机载担架支架的研制[J]. 医疗卫生装备, 2004, 35(2): 8-11. [6] Liu, L. (2018) Terminal Airspace Capacity Evaluation Model under Weather Condition from Perspective of a Controller. International Journal of Aerospace Engineering, No. 5, 1-9. https://doi.org/10.1155/2018/4728648 [7] 晋萍, 聂宏. 起落架着陆动态仿真分析模型及参数优化设计[J]. 南京航空航天大学报, 2003, 35(5): 408-502. [8] Oberstarzt, D. and Erich, R. (2001) Qualified Aeromedical Evacuation in the Extended Task Spectrum of National and International Military Missions. The Impact of NATO, 200, 4-6. [9] CCAR25-R4 运输类飞机适航标准[S]. 北京: 中国民航出版社, 2011. [10] GJB 67.3A-2008. 军用飞机结构强度规范其他载荷[S]. 北京: 中国人民解放军总装备部, 2008. [11] 付奇. 基于有限元方法的汽车座椅静强度和结构优化[D]: [硕士学位论文]. 长春: 吉林大学, 2004. [12] 万峻麟, 吕康, 毛勤俭, 等. 民航机载担架支架结构设计研究[J]. 新技术新工艺, 2013(8): 64-67. [13] 谢志东. 结构疲劳强度分析及工程应用[D]: [硕士学位论文]. 杭州: 浙江大学, 2008. [14] 孙明琦. 典型结构件疲劳寿命分析研究[J]. 哈尔滨理工大学学报, 2007, 12(1): 118-121.