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首页> 外文期刊>Journal of Aerospace Sciences and Technologies >DESIGN, ANALYSIS AND QUALIFICATION OF ENGINE FRAME STRUCTURE FOR SCRAMJET ENGINE
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DESIGN, ANALYSIS AND QUALIFICATION OF ENGINE FRAME STRUCTURE FOR SCRAMJET ENGINE

机译：SCRAMJET发动机的发动机框架结构的设计，分析和鉴定

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摘要

Design of Sc ramjet Engine Frame Structure offers challenges due to stringent specifications in geometry,structural mass and design of mounting interfaces for sub-systems.Scramjet engine mainly consists of engine frame structure (cold structure) and engine flow-duct (hot structure).The major subsystems viz.air intake cowl opening mechanism,avionics and propulsion system are mounted on engine frame structure.Detailed design of the Engine Frame Structure is carried out for expected loads during various critical flight events.The design is validated through rigorous Finite Element Analyses and further qualified through an intricate structural qualification program.Structural qualification tests o f scramjet engine structure offers diverse challenges due to simultaneous application o f loads acting on engine frame due to aerodynamics,inertia in longitudinal direction,loads due to spin o f vehicle,concentrated loads at interfaces o f subsystems and application of differential pressure for vented structure.In order to carry out structural qualification tests,one unit o f engine frame assembly is realised with critical interfaces similar to that in flight and qualified for ultimate load conditions.New concept of attaching subsystems on engine frame for a spinning vehicle configuration is demonstrated by structural qualification tests which are well proven through flight test.This technical paper describes the details of structural design,analysis and structural qualification carried out for engine frame assembly.
机译：超冲压发动机框架的设计面临着严苛的几何形状，结构质量和子系统安装接口设计的挑战，超喷射发动机主要由发动机框架结构（冷结构）和发动机流道（热结构）组成。主要子系统，即进气罩打开机构，航空电子设备和推进系统安装在发动机框架结构上。针对各种关键飞行事件中的预期载荷，对发动机框架结构进行了详细设计。通过严格的有限元分析对设计进行了验证。冲压喷气发动机结构的结构鉴定测试由于空气动力学，纵向惯性，车辆旋转产生的载荷，界面处的集中载荷而同时施加作用在发动机框架上的载荷，从而给发动机机架带来结构挑战。子系统的设计和v的压差应用为了执行结构鉴定测试，实现了一个发动机框架组件的一个单元，其关键接口类似于飞行中的关键接口，并符合极限载荷条件。演示了将子系统连接到发动机框架以用于旋转车配置的新概念本技术文件详细介绍了发动机框架总成的结构设计，分析和结构鉴定。

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