نتایج جستجو برای: energy dissipation rate

تعداد نتایج: 1581471  

Journal: :international journal of civil engineering 0
s. pagliara professor, destec-department of energy engineering,systems, land and construction, university of pisa, via gabba 22, 56122, pisa, italy t. roshni ph.d, destec-department of energy engineering, systems,land and construction, university of pisa, via gabba 22,56122, pisa italy m. palermo ph.d, destec-department of energy engineering, systems,land and construction, university of pisa, via gabba 22,56122, pisa italy

rock chutes are natural river training structures and are efficient energy dissipaters too. from the hydraulic and environmental point of view, rock chutes have become important structures in the natural river morphology. a physical study was conducted and flow properties were measured over rough bed materials of a rock chute, which was assembled at the pitlab center of the university of pisa, ...

Journal: :journal of modern processes in manufacturing and production 2014
mehdi jahangiri

wear is a complicated phenomenon caused by the relative movement of two contacting surfaces compressed together by a normal force. prediction of the wear, in most cases, requires various experiments and microstructural characterization of the contacting surfaces. mathematical models based on physical concepts could provide considerable help in understanding the physical behavior and hence the p...

Journal: :international journal of civil engineering 0
mohammad reza kavian pour k.n. toosi university of technology, valiasr-mirdamad cross, tehran, iran h.r. masoumi

hydraulics of stepped spillway is a very complicated phenomenon, as it consists of a two phase flow passing through a set of designed steps. the steps increase the rate of energy dissipation taking place on the spillway face. turbulence, flow aeration and energy dissipation are the main tasks in the design of such structures. this study consists of the experimental investigation to determine th...

Journal: :international journal of civil engineering 0
m. c. yılmaz gazi university, engineering faculty, civil engineering department, turkey ö. anıl gazi university, engineering faculty, civil engineering department, turkey b. alyavuz gazi university, engineering faculty, civil engineering department, turkey e. kantar celal bayar university, engineering faculty, civil engineering department, turkey

experiments were carried out to observe the influence of loading type on concrete beam specimens. beam specimens made of similar concrete mixture with the same geometry were tested under three point static loading and low velocity drop weight impact loading. load – displacement behavior, absorbed energy dissipation capacity, stiffnesses, failure modes of beam specimens were obtained and discuss...

ژورنال: علوم آب و خاک 2020

Lopac gates, with the benefits of easy installation, automation and the ability to pass sediments and floating objects, are among the new structures considered for water level regulation and flow control in the irrigation canals. Converting the shape of the gate from a rectangular one to an elliptical one allows the flow rate to be increased by the same water level. In the present study, the ef...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز 1354

بخش اول این مقاله بررسی قوانین بقاء یک سیستم مادی در نظریه نسبیت عمومی (تئوری جاذبه انیشتین) است . در بخش دوم بعد از بحث مختصری راجع بضرائب متریک در تقریب های اول و دوم بالاتر از حد نیوتونی،معادلات ئیرودینامیک در تقریب دو ونیم بالاتر از حد نیوتونی بدست آورده شده است . در بخش سوم، از میزان هدردهی (dissipation rate) انرژی برای تعدادی منابع ممکنه امواج جاذبه بحث شده است . میزان هدردهی مقدار اندازه...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

seismic retrofit strategies have been developed in the past few decades following the introduction of new seismic provisions and the availability of advanced materials and methods. it can be observed that new approaches to deal with more lateral forces are more innovative and more energy absorbent. in line with this, there is a growing trend toward the use of steel shear walls as a system with ...

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