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Phillip Burgers
An extant bird resorts to flapping and running along its take-off run to generate lift and thrust in order to reach the minimum required wing velocity speed required for lift-off. This paper introduces the replication hypothesis that posits that the vari...
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Yingfa Lu, Wenqing Sun, Hao Yang, Junjie Jiang and Lier Lu
On the basis of the force and safety factor analysis of traditional retaining walls, a new analytical method of force and displacement of the slope is suggested, the numerical theoretical solution of the stress distribution of the sliding body can be obt...
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V.A. Samsonov,D.V. Belyakov
Pág. 31 - 38
The work is devoted to the construction and study of a mathematical model of self-oscillations of an aerodynamic pendulum in a medium flow. The model of quasi-static flow of the plate by the medium was adopted as a model of the impact of the medium on th...
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Lei Li, Guangfeng Li, Nasim Uddin, Limin Tian, Zhibing Zhu, Chong Bai and Chen Shen
As large-span structures, reticulated shells are widely used in large-scale public building and act as emergency shelters in the event of sudden disasters. However, spatial reticulated shells are dynamic-sensitive structures; the effect of the initial st...
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Natalia Prieto Jiménez,Germán González Silva
Pág. 152 - 164
he success during the operation of natural gas processing plants depends on the correct estimation of thermodynamic properties of the system. This paper calculates the equilibrium curves of real and synthetic natural gas mixtures means of three Equations...
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Hossein Khosravi, Mahmood Khosravi
Pág. 66 - 81
The present study aims to provide an exact solution for thermal buckling of bimorph functionally graded circular plates under uniform thermal loading with regard to von Kármán?s classic theory and non-linear assumptions in clamped-clamped, simple-simple,...
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Krzysztof Wojciech Fornalski
Every living organism is a physical, complex system which can be modeled by nonlinear dynamical equations in some very narrowed cases. Here we discuss the adoption and potential application of Lotka?Volterra equations (with damping) to simulate, on a ver...
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Wael S. Amer, Tarek S. Amer, Roman Starosta and Mohamed A. Bek
The major objective of this research is to study the planar dynamical motion of 2DOF of an auto-parametric pendulum attached with a damped system. Using Lagrange?s equations in terms of generalized coordinates, the fundamental equations of motion (EOM) a...
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Tianlong Lei, Jixin Wang and Zongwei Yao
This study constructs a nonlinear dynamic model of articulated vehicles and a model of hydraulic steering system. The equations of state required for nonlinear vehicle dynamics models, stability analysis models, and corresponding eigenvalue analysis are ...
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Mónica Martínez Martínez
Pág. 134 - 144
In the present work it is explained how the architect Felix Candela got to analyse the roof long cylindrical shells in reinforced concrete using an method based simply on equilibrium equations. All this, in a moment in which the elastic theory of shells ...
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Vilmar Steffen, Edson Antonio da Silva
Pág. 61 - 69
An algorithm for the solution of the mathematical model featuring reactive distillation process in steady-state columns is analyzed. It has been presumed that each stage?s outlet streams in the model were in phase equilibrium conditions and that chemical...
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Lixiong Gu, Chunguang Dong, Yi Zhang, Xiaoxia Zhen, Guiyuan Liu and Jianyi Ji
An approach is presented to investigate the 1:2 internal resonance of the sling and beam of a suspension sling?beam system. The beam was taken as the geometrically linear Euler beam, and the sling was considered to be geometrically nonlinear. The dynamic...
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Xuanyang Zhang, Miao Yu, Jiaxin Liang, Chao Yang and Wei Liu
For rectangular section tunnel construction, soil bin pressure fluctuates under biaxial emergence conditions. Support pressure is difficult to uniformly distribute, and it can easily cause instability of the tunneling face. The Silo-wedge model is used t...
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Wenfeng Xu, Yinghui Li, Binbin Pei and Zhilong Yu
This work develops a morphing decision strategy to optimize the cruising efficiency for a variable-sweep morphing aircraft, and a simple and practical guidance and control system is given as well. They can work in tandem to accomplish a cruise mission ef...
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Keyu Li, Chao Yang, Xiaozhe Wang, Zhiqiang Wan and Chang Li
Microstructured materials, characterized by their lower weight and multifunctionality, have great application prospects in the aerospace field. Optimization methods play a pivotal role in enhancing the design efficiency of both macrostructural and micros...
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Shouxu Chen, Weidong Chen, Ti Chen and Junjie Kang
A tethered towing system provides an effective method for capturing pieces of space debris and dragging them out of orbit. This paper focuses on the in-plane stability analysis and libration control of a two-segment tethered towing system. The first segm...
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Yanjie Zhao, Guanci Chen, Wenbin Zhang and Yinke Ding
The traditional slewing bearing with circular raceway has the problem of stress concentration under the large overturning moment. In this paper, a new non-circular raceway of a slewing ball bearing was presented to conquer this problem. To obtain the new...
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Ubaldo Cella, Francesco Salvadore, Raffaele Ponzini and Marco Evangelos Biancolini
A procedure for the optimization of a catamaran?s sail plan able to provide a preliminary optimal appendages configuration is described. The method integrates a sail parametric CAD model, an automatic computational domain generator and a Velocity Predict...
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Hale Akbulut, Hüseyin Taylan Egen
From the 1980s to onwards trade liberalization policies have been widely used in many countries. This process has significant impacts on many economic aspects one of which is on the labour market. However, the direction of the relationship between ...
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Hale Akbulut, Hüseyin Taylan Egen
Pág. 213 - 234
From the 1980s to onwards trade liberalization policies have been widely used in many countries. This process has significant impacts on many economic aspects one of which is on the labour market. However, the direction of the relationship between ...
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