民机地板以下结构参数变化对机身适坠性能的影响研究  

Research of Influence of Sub-floor Structural Parameters to Crashworthiness of Civil Aircraft Fuselage

作　　者：苟仲秋[1] 孙侠生[2] 宋笔锋[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072 [2]中国飞机强度研究所,陕西西安710065

出　　处：《航空计算技术》2007年第6期32-35,共4页Aeronautical Computing Technique

摘　　要：为了确保乘员在可生存事故中存活,民机结构必须具备适坠特性。适坠性设计的关键部位为地板以下结构,包括底框、行李舱底部结构和行李舱支柱三个元素。对民机典型机身结构进行了简化,利用LS-DYNA建立了1/4缩比动力学仿真模型,利用该模型考察了行李舱支柱位置、角度及行李舱高度变化对机身坠撞特性的影响,仿真结果表明合理选择行李舱支柱位置、角度及行李舱高度参数可以大大改善民机机身结构的适坠性能。For ensuring occupant＇s survivability in case of survivable crash accidents, civil aircrafts must have good crashworthiness. The key part of fuselage crashworthiness design for civil aircrafts is sub - floor structures including frame of sub - floor, structures under luggage cabin and strut of luggage cabin. A typical civil aircraft fuselage is simplified and a 1/4 scale dynamics simulation model based on the simplified structure is built with LS-DYNA, a business finite element software. With the scaled model, the influence of the location, slope degree of strut and the height of the luggage cabin to drop and crash properties of aircraft are researched. The results show that appropriate values of these structural parameters can improve the crashworthiness of civil aircraft fuselage structures effectively.

关 键 词：适坠性 吸能 结构 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]