2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)最新文献_第8页

Steady State Calculation and Performance Analysis of Variable Cycle Engine 变循环发动机稳态计算与性能分析

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467557

Yu-sang Li, Yu-chun Chen, Qiang Zhao

引用次数: 1

Jet-Wing Interaction Flow Field Study for Missiles in Supersonic Free Streams 超音速自由流中导弹射流-翼相互作用流场研究

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467682

Long-fei Li, Yu-Han Wang, Jiang-feng Wang, Faming Zhao

引用次数: 0

Influence of the Landing Gear Casing on A High Lift Aircraft 起落架机匣对大升力飞机的影响

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467630

Zhi-hua Wang, Yu-chun Chen, G. Yuan, Hao-min Li

引用次数: 0

Study on the Mechanical Properties of Dissimilar Friction Stir Welding of AA 7075 T6 and AZ31B Alloys AA 7075 - T6与AZ31B合金异种搅拌摩擦焊接力学性能研究

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467679

Musa Bilgin, Ş. Karabulut, A. Özdemir

{"title":"Study on the Mechanical Properties of Dissimilar Friction Stir Welding of AA 7075 T6 and AZ31B Alloys","authors":"Musa Bilgin, Ş. Karabulut, A. Özdemir","doi":"10.1109/ICMAE.2018.8467679","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467679","url":null,"abstract":"In this study, the welding properties of the AA 7075 T6 and AZ31B magnesium sheets were studied by using friction stir welding (FSW). For this purpose, the present work was investigate to elucidate the effect of FSW parameters on the tensile strength, impact strength and microstructural behaviors of dissimilar welding of the AA7075 T6 and AZ31B Mg alloys. Aluminum and magnesium sheets were successfully joined using FSW and the samples were tested for the mechanical and microstructural properties to determine the optimal welding variables. The welding process was performed using different feed rates, offset values and tool profiles while spindle speed was kept constant. The joining sheets were heated with hot air blowing behind the tool during the FSW process to prevent crack formation due to the residual stress. The tests results showed that the better tensile and impact strengths were obtained with square tool a constant spindle speed of 500 rev/min, a feed rate of 20 mm/min, and a tool offset of 0.2 mm. It was also observed the formation of tunnel because of low melting temperatures and insufficient mixing caused to reduction of area and notch effect in the welded zone.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122292999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Numerical Study of Wind Loads on A Solar Panel at Different Inclination Angles 不同倾角下太阳能帆板风荷载的数值研究

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467710

O. Yemenici, Muhammed Osman Aksoy

引用次数: 1

Performance Analysis of Mode Transition of a Triple Combined Cycle Engine 三联循环发动机模式转换性能分析

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467660

Yuan Gao, Yu-chun Chen, Shao-feng Zhang, Zhi-hua Wang

{"title":"Performance Analysis of Mode Transition of a Triple Combined Cycle Engine","authors":"Yuan Gao, Yu-chun Chen, Shao-feng Zhang, Zhi-hua Wang","doi":"10.1109/ICMAE.2018.8467660","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467660","url":null,"abstract":"For a reusable hypersonic cruise vehicle with the ability of horizontal take-off and landing, triple combined cycle engine is a suitable choice in a short term. The triple combined cycle engine in this paper is a combination of turbine engine, ramjet engine and DMSJ (dual mode scramjet) engine. It can operate at three modes. The transition of the three modes is crucial to the performance of the engine. This paper establishes the performance calculation model of the triple combined cycle engine. Providing the control schedule of the engine, the engine performance during mode transition is studied. The design of the turbine-to-ramjet mode transition zone and the performance during of the ramjet-to-DMSJ mode transition are analyzed. The principle of turbine-to-ramjet mode transition is that the increase of airflow rate caused by ram duct air supply and the decrease of installation loss can compensate the loss of specific thrust. Therefore, it can be assured that the thrust can transit smoothly and is higher. Performance simulations show that the influence between the two flow paths is small, thus the thrust transition is stable during the ramjet-to-DMSJ mode transition.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116494956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear Dynamic Responses of A Cantilever Beam under Mixed Mode of Vibration Loads 混合振动荷载作用下悬臂梁的非线性动力响应

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467600

Yi Li, Bing-xi Sun, Jie Fang, Tong Liang, Guo-biao Cai

{"title":"Nonlinear Dynamic Responses of A Cantilever Beam under Mixed Mode of Vibration Loads","authors":"Yi Li, Bing-xi Sun, Jie Fang, Tong Liang, Guo-biao Cai","doi":"10.1109/ICMAE.2018.8467600","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467600","url":null,"abstract":"As a representative structure, the cantilever beam has been studied under sinusoidal or random vibration tests, of which the nonlinear dynamic feature has been discussed comprehensively. However the responses of a cantilever beam under mixed mode of vibration loads, such as sine-on-random, random-on-random, sine-on-random-on-random, are rarely investigated experimentally. Therefore, various vibration tests of a cantilever beam made of titanium alloy were conducted including sine sweep, random, and the aforementioned mixed modes. In the sine-on-random test including natural frequencies as sinusoidal components, nonlinear dynamics occurred that response significantly amplified at the double, triple of first order natural frequency and specific values around the second order. But there were no such magnifications in narrow-band random on wide-band random excitation test, and the result of sine-on-random-on-random was similar to the sine-on-random experiment. Consequently, the resonant sinusoidal components caused nonlinear responses of the cantilever beam. The nonlinear dynamic feature is noteworthy in mechanical design.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126619459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Passive Flow Control Method Based on the Coandă Effect 基于科安德效应的被动流量控制方法

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467708

F. Florin, A. Dumitrache, O. Preotu

引用次数: 0

Quaternion-based Control of Fixed-Wing UAVs Using Logarithmic Mapping 基于对数映射的四元数固定翼无人机控制

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467639

E. Oland

引用次数: 2

A Multi-Band Frequency and Pattern Reconfigurable Antenna for Wi-Fi/WiMAX and WLAN Applications : Frequency and Pattern Reconfigurable Antenna 用于Wi-Fi/WiMAX和WLAN应用的多频带频率和方向图可重构天线:频率和方向图可重构天线

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467558

S. Chilukuri, Y. P. Rangaiah, A. Lokam, K. Dahal

{"title":"A Multi-Band Frequency and Pattern Reconfigurable Antenna for Wi-Fi/WiMAX and WLAN Applications : Frequency and Pattern Reconfigurable Antenna","authors":"S. Chilukuri, Y. P. Rangaiah, A. Lokam, K. Dahal","doi":"10.1109/ICMAE.2018.8467558","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467558","url":null,"abstract":"This paper reports design and investigations on a planar multi-band frequency- and pattern- reconfigurable antenna by use of PIN diodes. The reconfiguration mechanism is achieved by changing the controlled activation of the slots placed on a circular disk which is fed by Coplanar Waveguide feed. The antenna is symmetrical along the longitudinal axis and consists of seven PIN diodes on each half of the circle cutting the longitudinal axis. A total of 15 PIN diodes are used to make the antenna operate in 7 different modes. A beam shape pattern reconfigurability is achieved by operating the antenna in all the modes. The basic antenna is a circular disk without slots and is designed to operate at 2.4GHz. Frequency reconfigurability is achieved by changing the electrical length of the slot by activating the switches in appropriate positions in different operating modes. Pattern reconfigurability is achieved by maintaining the same overall electrical length in each operating mode but changing the switch positions orient in a particular direction in each half of the circle. The investigative simulations were carried out using Ansys HFSS. The proposed antenna resonates is applicable to WiMAX, Wi-Fi, WLAN wireless services.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133492627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5