فهرس المقالات analytical method

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  1 - Contrast of Homotopy and Adomian Decomposition Methods with Mittage-Leffler ‎F‎unction for Solving Some Nonlinear Fractional Partial Differential ‎Equations‎
  M. Jahanshahi H. Kazemi demneh
  ‎In this paper‎, ‎a class of nonlinear fractional partial differential equation is considerd and solved by advanced analytical-numerical methods such as homotopy analytical and Adomian decomposition Methods and Mittag-Leffler functions‎. ‎The obtaine أکثر

  ‎In this paper‎, ‎a class of nonlinear fractional partial differential equation is considerd and solved by advanced analytical-numerical methods such as homotopy analytical and Adomian decomposition Methods and Mittag-Leffler functions‎. ‎The obtained approximate solutions show that these solutions are same for the first three approximate terms $ u_{1}‎, ‎u_{2}‎, ‎u_{3}$. تفاصيل المقالة
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  2 - On Validity of Analytical Method in Cracked Column Post-Buckling Analysis Using Empirical and Numerical Investigations
  K Salmalian A Alijani H Ramezannejad Azarboni
  10.22034/jsm.2020.1904760.1623
  The three analytical, finite element and experimental methods are applied to study the nonlinear buckling of cracked columns. The original aim of this research is to investigate the validity of the common analytical method in an analogy with the experimental method and أکثر

  The three analytical, finite element and experimental methods are applied to study the nonlinear buckling of cracked columns. The original aim of this research is to investigate the validity of the common analytical method in an analogy with the experimental method and the finite element method of MATLAB programming-based. The literature review shows that papers applied this analytical method without considering its drawbacks to determine the post-buckling results. Results in the linear part of the analytical method are in close accordance with the two others, while a clear difference in the nonlinear part of the analytical method is observed with the actual results obtained from the experimental tests and numerical results of the finite element method. An in-depth discussion is represented to find out the main reasons of this difference. The conversion matrix technique in the finite element method and dividing the column into two segments in the analytical method are used to include the crack parameters in relations according to the continuity conditions in the crack tip. An investigation is performed to study the effect of the crack depth and position on the critical buckling load and the post-buckling path. تفاصيل المقالة
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  3 - Static Analysis of Functionally Graded Annular Plate Resting on Elastic Foundation Subject to an Axisymmetric Transverse Load Based on the Three Dimensional Theory of Elasticity
  A Behravan Rad A Alibeigloo S.S Malihi
  In this paper, static analysis of functionally graded annular plate resting on elastic foundation with various boundary conditions is carried out by using a semi-‍analytical approach‍ (SSM‍-DQM). The differential governing equations are presented based on th أکثر

  In this paper, static analysis of functionally graded annular plate resting on elastic foundation with various boundary conditions is carried out by using a semi-‍analytical approach‍ (SSM‍-DQM). The differential governing equations are presented based on the three dimensional theory of elasticity. The plate is assumed isotropic at any point, while material properties to vary exponentially through the thickness direction and the Poisson’s ratio remain constant. The system of governing partial differential equations can be writhen as state equations by expanding the state variables and using the state space method (SSM) about thickness direction and applying the one dimensional differential quadrature method (DQM) along the radial direction. Interactions between the plate and two parameter elastic foundations are treated as boundary conditions. The stresses and displacements distributions are obtained by solving these state equations. In this study, the influences of the material property graded index, the elastic foundation coefficients (Winkler-Pasternak), the thickness to radius ratio, and edge supports effect on the bending behavior of the FGM annular plate are investigated and discussed in details. تفاصيل المقالة
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  4 - تخمین نشت تونل انتقال آب امیرکبیر با بهره گیری از روش های تحلیلی و مقایسه آن با روش SGR
  هادی فرهادیان میثم سلوکی همایون کتیبه
  در این تحقیق، با استفاده از روشهای تحلیلی، میزان نشت آب یز رزم ینی در 110مقطع مختلـف از مسـیر تونـل انتقـال آب امیرکبیـر)کیلومتر تا (14 1/ 1/3تخمینزده شده است. آنگاه، نتایج حاصله با نتایج حاصل از روش ردهبندی سـاختگاه تونـل ) (SGRمقایسـهگرد . دی مسیر تونل انتقال آب امیرک أکثر

  در این تحقیق، با استفاده از روشهای تحلیلی، میزان نشت آب یز رزم ینی در 110مقطع مختلـف از مسـیر تونـل انتقـال آب امیرکبیـر)کیلومتر تا (14 1/ 1/3تخمینزده شده است. آنگاه، نتایج حاصله با نتایج حاصل از روش ردهبندی سـاختگاه تونـل ) (SGRمقایسـهگرد . دی مسیر تونل انتقال آب امیرکبیر در کیلومترهای و 10 1/ 9/3 ،7/4 ،8/7در مناطق خرد شده و گسـله قـرار دارد کـه بـر اسـاسروش SGRو ن زی محاسبات تحل ،یلی نشت آب زیرزم ینی به تونـل، در ایـن منـاطق متمرکـز شـده اسـت و در فواصـل 10 – 7/8و/ 14 - 1/ 10 2کیلومتر از مسیر تونل به دلیل زیاد بودن فاصله درزه ها و شکستگی ها در ساختگاه تونل، کم بودن اندازه دهانـه درزه وپایین بودن مقدار نفوذپذیری، کمترین مقادیر نشت آب زیرزمینی به تونل محاسبه شده است. ب نتایج بدست آمده از رده ندی سـاختگاهتونل به کمک روش SGRتطابق خوبی را با مقادیر بدست آمده از روش های تحلیلی در محاسـبه میـزان نشـت آب زیرزمینـی بـهتونل نشان میدهد. بر طبق روش ، SGRبیش از 60درصد از مسیر تونل انتقال آب امیرکبیر در رده بی خطر قرار گرفته است که بـانتایج حاصل از معادلات تحلیلی که مقدار جریانی در حدود /0 026لیتر بر ثانیه در هر متر را نشان میدهد، همخـوانی دارد. از سـویدیگر بر طبق روش SGRدر حدود 5درصد از تونل در منطقه بحرانی قرار گرفته است که عمـدتاً منطبـق بـر منـاطق گسـله و زونخرد شده است که برطبق نتایج حاصل از معادلات تحلیلی مقدار جریانی در حدود /0 46لیتر بر ثانیه در هر متر خواهد داشت تفاصيل المقالة
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  5 - Identity and Foreign Policy
  Ebrahim Anoosheh
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  6 - The Review Study of Forging and Effects on the Produced Part
  مریم صالح
  There are several method for forming bulk material, such as forging, rolling and extrusion. Every of these methods have advantages and dis-advantages of their selves. Forging process is one of the most common of them that include a die, press and in some case heater wit أکثر

  There are several method for forming bulk material, such as forging, rolling and extrusion. Every of these methods have advantages and dis-advantages of their selves. Forging process is one of the most common of them that include a die, press and in some case heater with controlling system, and has a special place in automotive, military and aerospace industries due uniformity of the final product, speed of process, repeat-ability and low final cost. Forging die has an upper and lower part. There are numerous studies about simulation, die design, load estimation, understanding and optimizing this process. In this article, forging is dis-cussed briefly. This study is conducted in the field of process tools, analytical methods, simulation and result comparison of analytic, analysis and excremental conditions and also the effect of the forging in micro-structure and mechanical properties(such as tensile and hardness) in some cases studied briefly as a review of other researches. تفاصيل المقالة