Aerospace Systems最新文献_第7页

A novel on–off linear quadratic regulator control approach for satellite rendezvous 一种新型的卫星交会开关线性二次型调节器控制方法

Aerospace Systems Pub Date : 2023-06-23 DOI: 10.1007/s42401-023-00230-9

Hossein Rouzegar, Mohammad Ghanbarisabagh

引用次数: 0

Evaluations on VCCT and CZM methods of delamination propagation simulation for composite specimens 复合材料试样分层扩展模拟的VCCT和CZM方法评价

Aerospace Systems Pub Date : 2023-06-20 DOI: 10.1007/s42401-023-00231-8

Rui Liu, Zhefeng Yu, Fedor Nasonov

{"title":"Evaluations on VCCT and CZM methods of delamination propagation simulation for composite specimens","authors":"Rui Liu, Zhefeng Yu, Fedor Nasonov","doi":"10.1007/s42401-023-00231-8","DOIUrl":"10.1007/s42401-023-00231-8","url":null,"abstract":"<div><p>Fiber-reinforced composite laminates are widely used in aerospace and other fields. Delamination damage is the main damage form of laminates, which has always been one of the focus problems of composite mechanics. Virtual crack closure technique (VCCT) and cohesive zone modeling (CZM) are two well-known numerical methods frequently used for crack propagation modeling. In this study, to better understand the advantages and limitations of these two methods, as well as the process of practical application, the evaluations on them are conducted. A double cantilever beam (DCB) specimen, an end notched flexure (ENF) specimen, and a mixed-mode bending (MMB) specimen as benchmark examples are modeled in ABAQUS. The mode I, mode II, and mixed-mode (I + II) delamination initiation and propagation behaviors of unidirectional specimens are simulated using two above methods. Finite element (FE) results are compared with experimental results available in the literature to verify the validity of the FE models. Finally, the accuracy, convergence speed, run-time, mesh dependency, and influence of modeling parameters of each method are discussed based on the simulation of DCB test.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90868735","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: 1

A new coupling model of dynamics and thermodynamics to predict trajectory of stratospheric airship during ascent 一种新的平流层飞艇上升过程动力学和热力学耦合模型

Aerospace Systems Pub Date : 2023-06-14 DOI: 10.1007/s42401-023-00227-4

Xianghao Liu, Xiaoliang Wang

{"title":"A new coupling model of dynamics and thermodynamics to predict trajectory of stratospheric airship during ascent","authors":"Xianghao Liu, Xiaoliang Wang","doi":"10.1007/s42401-023-00227-4","DOIUrl":"10.1007/s42401-023-00227-4","url":null,"abstract":"<div><p>Predicting the trajectory of the airship during its ascent before it is released has significance in avoiding possible accidents. To achieve this, a new coupled thermodynamics and dynamics model is developed. A rigid body model with 6 degrees of freedom is adopted. Time-varying aerodynamic forces and mass distribution parameters are also included in this model. The thermodynamic model considers the heat transfer process of radiation and convection among the film of airship, helium, internal air, and atmosphere. The simulation results show that more accurate results can be obtained using the rigid body model with six degrees of freedom compared with the three degrees of freedom model. The existence of the sunlight will also affect the movement of the airship, which will cause the temperature of the buoyant gas to increase and the airship to move faster. Some factors which will affect thermal behavior of helium are also investigated. Results show that the larger the initial helium volume is, the more serious the supercooling phenomenon of helium will happen. The greater the solar radiation absorptivity of the film is, the lower the supercooling temperature will be, but it will cause helium more hotter during floating stage. The overpressure of the airbag has no significant effect on the motion of the airship.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50481552","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

Probabilistic approach to safety factor evaluation for aircraft wing design 飞机机翼设计安全系数评估的概率方法

Aerospace Systems Pub Date : 2023-06-08 DOI: 10.1007/s42401-023-00226-5

Maksim Yu. Kalyagin, Vyacheslav S. Safronov, Andrey A. Zamkovoi

{"title":"Probabilistic approach to safety factor evaluation for aircraft wing design","authors":"Maksim Yu. Kalyagin, Vyacheslav S. Safronov, Andrey A. Zamkovoi","doi":"10.1007/s42401-023-00226-5","DOIUrl":"10.1007/s42401-023-00226-5","url":null,"abstract":"<div><p>Continuous growth of aircraft speed and altitude has a decisive influence on changes in their aerodynamic layout and structural-power diagrams, which leads to significant changes in the shape and thickness of wing profiles. The paper proposes a probabilistic-time approach to the solution of the actual problem of assessing the strength of a caisson wing structure. At the same time, a quasi-static methodology is used, according to which the probability of failure is considered at the most critical points, and the calculation is carried out at a fixed point in time, at which the loading of the wing structure is the most dangerous. The loads and load capacity of the wing in this approach are random values, which necessitates the use of statistical modeling in the calculations. On the basis of the authors' earlier researches, an engineering method of the strength calculation of the aircraft caisson wing has been developed, involving analytical and statistical modeling to estimate the influence of the safety factor on the probability of its non-failure operation. This methodology can be widely used in the design of aircraft as statistical material on the wing loads and its strength characteristics is accumulated. Numerical experiments based on Monte Carlo method for calculating the probability of no-failure operation of the caisson wing have been conducted. The dependences of the probability of no-failure operation on the safety factor for the most interesting, from the viewpoint of engineering practice, the non-failure range from 0.99 to 0.999 were obtained.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77225662","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

Influence of cohesive zone model parameters of polymer lugs with metal bushing on their geometrical and mass characteristics 带金属衬套的聚合物耳片内聚区模型参数对其几何和质量特性的影响

Aerospace Systems Pub Date : 2023-06-07 DOI: 10.1007/s42401-023-00228-3

Evgenii Kurkin, Evgenii Kishov, Vladislava Chertykovtseva

{"title":"Influence of cohesive zone model parameters of polymer lugs with metal bushing on their geometrical and mass characteristics","authors":"Evgenii Kurkin, Evgenii Kishov, Vladislava Chertykovtseva","doi":"10.1007/s42401-023-00228-3","DOIUrl":"10.1007/s42401-023-00228-3","url":null,"abstract":"<div><p>This study aimed to develop an approach for the understanding of the relationship between the contact interaction properties of lugs and their strength and mass to design efficient and lightweight lugs for aerospace components. Lugs are crucial components of many aerospace mechanisms, and their properties are closely linked to their contact interactions with bushings. The approach taken in this study involved modeling the adhesive layer between the lug and bushing and optimizing the dimensions of the polymer lug and metal bushing to minimize the lug’s mass while maintaining adequate strength. Finite element analysis (FEA) and cohesive zone modeling (CZM) were used to simulate the effects of primary properties of contact interaction between lug body and bushing on the strength and mass of the lug, and both gradient-free and gradient-based optimization algorithms were employed to minimize the lug’s mass while maintaining its strength. The results showed that increasing shear and tensile contact strengths reduced the resulting mass, with tangential stress having the greatest effect. Moreover, increasing contact strength reduced the required dimensions of the lug and bushing, indicating the possibility of reducing the mass of the bushing–lug assembly using rougher bushings or ribbing.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88159790","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

An investigation of aerodynamic performance of aeroengine fan and booster under non-uniform inlet conditions 非均匀进气条件下航空发动机风扇和增压器空气动力性能的研究

Aerospace Systems Pub Date : 2023-05-26 DOI: 10.1007/s42401-023-00229-2

Zetian Qiu, Zhongyu Zhu, Xiaohua Liu

引用次数: 0

Forecasting of maintenance indicators of complex technical systems during storage 复杂技术系统在存储期间的维护指标预测

Aerospace Systems Pub Date : 2023-05-25 DOI: 10.1007/s42401-023-00225-6

Evgeniy Gusev, Aleksey Pronkin

{"title":"Forecasting of maintenance indicators of complex technical systems during storage","authors":"Evgeniy Gusev, Aleksey Pronkin","doi":"10.1007/s42401-023-00225-6","DOIUrl":"10.1007/s42401-023-00225-6","url":null,"abstract":"<div><p>Design, production, testing, and operation of reusable launch vehicles are promising areas of development and theoretical research in the field of systems for the maintenance, repair, restoration, and operation of aircraft, including reusable transport rocket and space systems, are relevant. The article is aimed at harmonizing the design solutions of technical systems related to measures for their maintenance during storage. The purpose of the article is to develop methods and algorithms that allow matching performance characteristics and design solutions. The scientific problem is solved by compiling and analyzing the state graph of maintenance models using the Kolmogorov system of differential equations. As a result, the models obtained make it possible to predict the performance of maintenance of complex technical systems during storage and explore the possibility of reducing downtime for maintenance without a significant decrease in the quality of maintenance, namely: to evaluate the optimal maintenance period, to agree on the reserve ratio and maintenance period (costs maintenance depending on the ratio of the reserve), choose the optimal strategy for scheduled maintenance, taking into account the continuous monitoring of the technical condition of the aircraft, evaluate the intensity of failure recovery during continuous and periodic monitoring, and justify the most appropriate ways to improve the quality of service, provided that downtime for maintenance is limited and predict the probability of detecting faults during maintenance.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50513927","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

Robust estimation of state vector coordinates in the controlled airplane motion problem 受控飞机运动问题中状态矢量坐标的鲁棒估计

Aerospace Systems Pub Date : 2023-05-25 DOI: 10.1007/s42401-023-00224-7

A. V. Panteleev, E. A. Khvoshnyanskaya

引用次数: 0

Numerical simulation of mini-air-jet vortex generators on a supercritical wing in transonic flow and the effect of temperature on its aerodynamic performance 跨音速流动中超临界机翼上微型喷气涡流发生器的数值模拟及其温度对气动性能的影响

Aerospace Systems Pub Date : 2023-05-25 DOI: 10.1007/s42401-023-00223-8

M. A. Brutyan, Tenzin Tadin

引用次数: 0

Ionospheric irregularities measurement using Indian SBAS-GAGAN 用印度SBAS-GAGAN测量电离层不规则性

Aerospace Systems Pub Date : 2023-05-02 DOI: 10.1007/s42401-023-00222-9

Kaitha Praveena, Perumalla Naveen Kumar, D. Krishna Reddy

引用次数: 1