共查询到18条相似文献,搜索用时 468 毫秒
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民机地板以下结构参数变化对复合材料机身适坠性能的影响研究 总被引:2,自引:2,他引:0
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。复合材料结构坠撞后的材料破坏形式与常规的金属材料破坏有所不同,复合材料民机的适坠性设计需要对地板以下结构参数变化对复合材料机身适坠特性的影响进行深入的评估。这里对某金属材料民机典型机身结构通过刚度等代设计得到复合材料机身简化模型,利用LS-DYNA3D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、刚度及行李舱高度变化对复合材料机身适坠性能的影响。仿真结果表明地板以下结构参数变化对复合材料机身和金属机身坠撞响应的影响是不同的,考察的参数中行李舱支柱角度、刚度是影响坠撞响应的关键因素。 相似文献
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气动平移式行李舱门作为被公路、旅游系列客车广泛应用的零部件之一,其工作效能的好坏,除影响行李舱门的开启方便之外,还对行李舱门在关闭状态时行李舱的密封性能具有重大的影响。主要介绍了在常规客车行李舱门气动机构的基础上,增加一套气缸和锁止机构,其操作简单方便,密封性能得到了极大的改善。 相似文献
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对用于地震灾害救援的多功能救援机器人,进行机构设计与机架制作探讨.通过对机器人机身杆件的自由度计算、机构极限越障高度计算、机身减振装置设计与机架的制作,完成了对该机器人机械结构的分析与实际制作. 相似文献
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从输送带、机身、张紧装置、机尾和行走机构等方面对马脊梁选煤厂可逆配仓皮带机进行设计,并对可逆皮带机的带宽、电动滚筒和链传动机构进行设计计算.该设计方案可为同类皮带输送机的选型设计提供参考. 相似文献
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机身剖面外形设计是客机总体设计的一个重要方面。在分析机身剖面类型和设计流程的基础上,研究了客机机身剖面的参数化设计方法。根据客舱段的主要控制参数,利用优化方法对机身剖面外形参数进行优化设计,开发了快速生成最优客舱剖面外形的计算程序,为客舱设计提供了一个工具,应用这一设计工具进行客舱剖面外形设计,可以有效缩短设计时间。 相似文献
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Xiaofeng Sun Essam Shehab Jörn Mehnen 《The International Journal of Advanced Manufacturing Technology》2013,66(5-8):763-774
This paper presents a knowledge model of the laser beam welding (LBW) in the aircraft industry, which is developed through the utilisation of integration definition for function modelling and concept mapping. The developed knowledge model has been captured in the form of rules and recommendations, which is commonly used as guidelines in this field, and represented with unified modelling language. The LBW component development comprises four key stages, namely, structure design, process planning, fixture fabrication and component fabrication. This has been achieved through the adoption of a three-phase qualitative research methodology: data collection and analysis, knowledge model development and validation. The captured knowledge in the form of rules and recommendations has developed an understanding of the LBW in the aircraft industry and improved the structure design and process planning from joint type selection, structure dimension definition and process parameter optimisation, etc. A prototype handbook has been developed based on skin–stringer connection of aircraft fuselage to guide designers and engineers directly in developing laser beam-welded fuselage panels. The procedure of knowledge modelling for the LBW as well as the methods and tools adopted can be applied to other processes. The developed knowledge model has been validated through a case study. 相似文献
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《Mechanical Systems and Signal Processing》2006,20(5):1044-1066
This article deals with design and realisation of a canard foreplane control system for an aeroelastic demonstrator, suitable for wind tunnel testing. Hardware and software will be described as the methodology adopted to design, implement and realise the software. Specific attention is devoted to PID application, tuning and fuselage vibration control implementation. Results of preliminary test and simulations are presented and show realistic system effectiveness in damping fuselage bending and torsion. This work describes all the activity performed at Politecnico di Milano before wind tunnel testing at VZLU, Prague, as part of Active Aeroelastic Aircraft Structures (3AS) EU project. 相似文献
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根据电机行业中各种电机转子轴的长度和大小不同、不同型号电机的转子轴在转子铁芯的定位不同以及轴与铁芯孔的配合不同等技术要求,研制一种电机转子入轴液压压力机,并针对电机自动化生产工序之一电机转子入轴工序的设备设计,提出一种基于计算机三维软件设计电机转子铁芯入轴小型液压压力机的模式,采用Solidwords三维绘图软件,达到直观、高效设计压力机机身结构和夹具,并根据不同技术要求,利用计算机辅助三维绘图软件强大功能,可快速地改变主机机身、夹具的设计。 相似文献