نتایج جستجو برای: dynamic loads

تعداد نتایج: 442334  

Journal: :مهندسی برق و الکترونیک ایران 0
soheil mohamad alizadeh shabestary mohammadreza saeedmanesh ashkan rahimi-kian esmaeil jalalabadi

in this paper, we investigated the necessity and effects of optimal control methods in the stability and performance of a micro-grid that operates in islanded mode. the micro-gird is consisted of a combine heat and power (chp), a capacitor bank (cb), photovoltaic panel (pv) as power generation sources. in addition, battery and the building electricity and thermal load are placed on the load sid...

Journal: :journal of seismology and earthquake engineering 0
mohammad reza arvin fasa university, fasa faradjollah askari iiees orang farzaneh university of tehran

although bearing capacity of footings on top of slopes under monotonic loadings have been investigated widely so far, safety and bearing capacity of these structures against repeated dynamic loads have not been considered well enough. in this paper, lower bound dynamic shakedown theorem in its numerical form has been employed to firstly obtain bearing capacity of strip footings on top of slopes...

آذغانی, محمود رضا, پرنیانپور, محمد, کاظم نژاد, انوشیروان, کهریزی, صدیقه, ارشاد, ندا ,

  Background : Epidemiological studies showed that low back pain after load-carrying and holding is the most common disorder in industrialized countries and cause of dysfunction and economic problems. Variable dynamic loads impose varying moments about the intervertebral joints and cause a threat to balance. The aim of the present study was to compare the postural stability while holding dynami...

Journal: :iranian journal of mechanical engineering transactions of the isme 0
mohammad sharyat k.n toosi university m. nikkhah

in the present paper, an exact solution for transient response of an infinitely long functionally graded thick-walled cylinder subjected to dynamic pressures at the boundary surfaces is presented for arbitrary initial conditions. the cylinder is assumed to have a plane-strain condition and the dynamic pressures are assumed to be imposed uniformly and axisymmetrically on the boundary surfaces. m...

2009
VIJAY K. PURI SHAMSHER PRAKASH

Design of foundations in earthquake prone areas needs special considerations. Shallow foundations may experience a reduction in bearing capacity and increase in settlement and tilt due to seismic loading. The reduction in bearing capacity depends on the nature and type of soil and ground acceleration parameters. In the case of piles, the soil-pile behavior under earthquake loading is generally ...

2017

• The fifth objective of the AASHO Road Test was as follows: "To develop instrumentation, test procedures, data, graphs and formulas which will reflect the capabilities of the various test sections; and which will be helpful in future highway design in the evaluation of the loadcarrying capabilities of existing highways and determining the most promising areas of further highway research." It w...

اسدی, حامد, داورپناه, مهدی , صنایع پسند, مجید ,

In this paper, the behavior of dynamic loads of a power system against voltage disturbances is investigated. Then a real electric grid, Khorasan electric grid in North-East of Iran, is modeled by dynamic model of generators, AVRs, governors, field current limiting systems and electric loads. The paper is continued by introducing a novel method, called VCI, for real time voltage instability dete...

2009
Gee - Cheol Kim Sang - Hoon Lee Joo - Won Kang

In the stadium structure, the significant dynamic responses such as resonance or similar behavior can be occurred by spectator rhythmical activities. Thus, accurate analysis and precise investigation of stadium structure that is subjected to dynamic loads are required for practical design and serviceability check of stadium structures. Moreover, it is desirable to measure and analyze the dynami...

جلال‌آبادی, اسماعیل , رحیمی‌کیان, اشکان ,

In this paper, a detailed mathematical model of a grid-connected micro-grid including wind-turbine, photo voltaic cells, CHP and Fuel Cell with respective uncertainties in electrical loads, thermal loads, PV and wind outputs are presented. Moreover, the effects of the considered uncertainties on the micro-grid’s operation cost are modeled as risk and this risk is reduced using Monte-Carlo...

Journal: :روش های عددی در مهندسی (استقلال) 0
امیرمسعود کی نیا a. m. kaynia

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