A Study on the Non-Gaussian Property by the Method of Limiting Streamline

2014 ◽  
Vol 919-921 ◽  
pp. 1390-1395
Author(s):  
Xu Feng Sun
Keyword(s):  
Pressure Distribution ◽  
Statistical Method ◽  
Flow Separation ◽  
Wind Pressure ◽  
Wind Action ◽  
Close Relationship ◽  
Non Gaussian ◽  
Limiting Streamlines ◽  
Fluctuating Wind

Under wind action, the property of non-Gaussian wind pressure distribution is very important for determination of peak factor, simulation of fluctuating wind pressure and design of cladding and components. Since the distribution of non-Gaussian zone is highly irregular based on the statistical method, any effort on giving regular non-Gaussian zone regions cant reflect the real non-Gaussian property. Considering the fact that non-Gaussian property was induced by flow separation and generally the movement of vortex showed the character of time averaged steady, taking a typical low-rise building as the example, the distribution of limiting streamlines and the theory of flow separation was applied in the research. Results show that the distribution of limiting streamlines has a close relationship with the intensity of non-Gaussian property and can be used as an intuitionistic tool in the research of identification and mechanism for non-Gaussian properties.

Wind pressure distribution on trough concentrator and fluctuating wind pressure characteristics

Solar Energy ◽  
2015 ◽  
Vol 120 ◽  
pp. 464-478 ◽  
Author(s):  
Qiong Zou ◽  
Zhengnong Li ◽  
Honghua Wu ◽  
Rao Kuang ◽  
Yi Hui
Keyword(s):  
Pressure Distribution ◽  
Wind Pressure ◽  
Fluctuating Wind ◽  
Pressure Characteristics

Experimental determination of wind pressure distribution for cylindrical and spherical flexible membrane structures

1995 ◽  
Vol 22 (1) ◽  
pp. 23-31 ◽  
Author(s):  
N. K. Srivastava ◽  
N. Turkkan
Keyword(s):  
Pressure Distribution ◽  
Flexible Structures ◽  
Experimental Studies ◽  
Wind Pressure ◽  
Support Pressure ◽  
Membrane Structures ◽  
Flexible Membrane ◽  
Internal Support ◽  
Wind Tunnel Study

Wind interaction with flexible structures, such as air-supported structures, is different from that of the standard rigid structures. Very few experimental studies are available in the literature with regards to wind effects on such structures. This paper presents an experimental wind tunnel study on hemispherical and cylindrical models of varying ratios of height to base width. The results of the steady state pressure distribution on flexible air-supported models are compared with those of the rigid models, which are generally known. Other varying parameters are also considered, such as wind velocity and direction, internal support pressure, and the Reynolds number. Key words: structure, experimental, wind pressure distribution, flexible membrane, cylindrical, spherical.

Measurement and Visualization of the Contact Pressure Distribution of Rubber Disks and Tires

1995 ◽  
Vol 23 (4) ◽  
pp. 238-255 ◽  
Author(s):  
E. H. Sakai
Keyword(s):  
Pressure Distribution ◽  
Contact Pressure ◽  
Contact Area ◽  
Light Absorption ◽  
Lateral Force ◽  
Contact Pressure Distribution ◽  
High Definition ◽  
The Road ◽  
Close Relationship ◽  
Processing Techniques

Abstract The contact conditions of a tire with the road surface have a close relationship to various properties of the tire and are among the most important characteristics in evaluating the performance of the tire. In this research, a new measurement device was developed that allows the contact stress distribution to be quantified and visualized. The measuring principle of this device is that the light absorption at the interface between an optical prism and an evenly ground or worn rubber surface is a function of contact pressure. The light absorption can be measured at a number of points on the surface to obtain the pressure distribution. Using this device, the contact pressure distribution of a rubber disk loaded against a plate was measured. It was found that the pressure distribution was not flat but varied greatly depending upon the height and diameter of the rubber disk. The variation can be explained by a “spring” effect, a “liquid” effect, and an “edge” effect of the rubber disk. Next, the measurement and image processing techniques were applied to a loaded tire. A very high definition image was obtained that displayed the true contact area, the shape of the area, and the pressure distribution from which irregular wear was easily detected. Finally, the deformation of the contact area and changes in the pressure distribution in the tread rubber block were measured when a lateral force was applied to the loaded tire.

Turkish policy towards Libya after the February 2011 revolution

2020 ◽  
pp. 31
Author(s):  
Rafea Shareef Dhanoon
Keyword(s):  
International Law ◽  
Military Cooperation ◽  
The West ◽  
Regional Parties ◽  
Spheres Of Influence ◽  
Close Relationship ◽  
Shed Light

The close relations between Turkey and Libya are still on the rise, and this was evident through Turkish support at all levels of the internationally recognized government of Al-Sarraj winner. The Memorandum of Understanding signed between Turkey and Libya on 27 / November 2019, in the areas of security and military cooperation and the determination of areas of influence revealed The navy, the extent of the historical close relationship between Ankara and Tripoli, just as the Turkish President Erdogan wanted to deliver a message to the West and other regional parties after the signing of the Memorandum of Understanding, that Turkey has a non-negotiable sovereign right to define the maritime spheres of influence and that this right stems from international law. In light of these tracks, we will shed light on the orientations of Turkish policy towards Libya after the February 2011 revolution, by defining the determinants of those trends and examining the most important obstacles in the march of Turkish policy towards Libya.

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