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Academic literature on the topic 'Semianalytical technique'

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Published: 14 March 2023

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Journal articles on the topic "Semianalytical technique"

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Murthy, Durbha V., and Krishna Rao V. Kaza. "Semianalytical technique for sensitivity analysis of unsteady aerodynamic computations." Journal of Aircraft 28, no. 8 (August 1991): 481–88. http://dx.doi.org/10.2514/3.46052.

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Haran, Bala S., and Ralph E. White. "A semianalytical technique for solving nonlinear partial differential equations." Computer Applications in Engineering Education 4, no. 3 (1996): 229–40. http://dx.doi.org/10.1002/(sici)1099-0542(1996)4:3<229::aid-cae5>3.0.co;2-f.

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Hatten, Noble, and Ryan P. Russell. "Semianalytical Technique for Six-Degree-of-Freedom Space Object Propagation." Journal of Guidance, Control, and Dynamics 42, no. 2 (February 2019): 217–28. http://dx.doi.org/10.2514/1.g003706.

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Porter, D. G., and M. J. Donahue. "Precession axis modification to a semianalytical Landau–Lifshitz solution technique." Journal of Applied Physics 103, no. 7 (April 2008): 07D920. http://dx.doi.org/10.1063/1.2838461.

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Fathy, A. E., V. A. Pendrick, B. D. Geller, S. M. Perlow, E. S. Tormey, A. Prabhu, and S. Tani. "An innovative semianalytical technique for ceramic evaluation at microwave frequencies." IEEE Transactions on Microwave Theory and Techniques 50, no. 10 (October 2002): 2247–52. http://dx.doi.org/10.1109/tmtt.2002.803438.

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Peng, Jian-She, Yan Liu, and Jie Yang. "A Semianalytical Method for Nonlinear Vibration of Euler-Bernoulli Beams with General Boundary Conditions." Mathematical Problems in Engineering 2010 (2010): 1–17. http://dx.doi.org/10.1155/2010/591786.

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This paper presents a new semianalytical approach for geometrically nonlinear vibration analysis of Euler-Bernoulli beams with different boundary conditions. The method makes use of Linstedt-Poincaré perturbation technique to transform the nonlinear governing equations into a linear differential equation system, whose solutions are then sought through the use of differential quadrature approximation in space domain and an analytical series expansion in time domain. Validation of the present method is conducted in numerical examples through direct comparisons with existing solutions, showing that the proposed semianalytical method has excellent convergence and can give very accurate results at a long time interval.
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Hayashi, Takahiro, Koichiro Kawashima, Zongqi Sun, and Joseph L. Rose. "Guided Wave Propagation Mechanics Across a Pipe Elbow." Journal of Pressure Vessel Technology 127, no. 3 (January 24, 2005): 322–27. http://dx.doi.org/10.1115/1.1990210.

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Wave propagation across a pipe elbow region is complex. Subsequent reflected and transmitted waves are largely deformed due to mode conversions at the elbow. This prevents us to date from applying guided waves to the nondestructive evaluation of meandering pipeworks. Since theoretical development of guided wave propagation in a pipe is difficult, numerical modeling techniques are useful. We have introduced a semianalytical finite element method, a special modeling technique for guided wave propagation, because ordinary finite element methods require extremely long computational times and memory for such a long-range guided wave calculation. In this study, the semianalytical finite element method for curved pipes is developed. A curved cylindrical coordinate system is used for the curved pipe region, where a curved center axis of the pipe elbow region is an axis (z′ axis) of the coordinate system, instead of the straight axis (z axis) of the cylindrical coordinate system. Guided waves in the z′ direction are described as a superposition of orthogonal functions. The calculation region is divided only in the thickness and circumferential directions. Using this calculation technique, echoes from the back wall beyond up to four elbows are discussed.
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Iqbal, Javed, Khurram Shabbir, and Liliana Guran. "Semianalytical Solutions of Some Nonlinear-Time Fractional Models Using Variational Iteration Laplace Transform Method." Journal of Function Spaces 2021 (November 9, 2021): 1–9. http://dx.doi.org/10.1155/2021/8345682.

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In this work, we combined two techniques, the variational iteration technique and the Laplace transform method, in order to solve some nonlinear-time fractional partial differential equations. Although the exact solutions may exist, we introduced the technique VITM that approximates the solutions that are difficult to find. Even a single iteration best approximates the exact solutions. The fractional derivatives being used are in the Caputo-Fabrizio sense. The reliability and efficiency of this newly introduced method is discussed in details from its numerical results and their graphical approximations. Moreover, possible consequences of these results as an application of fixed-point theorem are placed before the experts as an open problem.
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Lu, Minhua, Shuai Huang, Xianglong Yang, Lei Yang, and Rui Mao. "Semianalytical Solution for the Deformation of an Elastic Layer under an Axisymmetrically Distributed Power-Form Load: Application to Fluid-Jet-Induced Indentation of Biological Soft Tissues." BioMed Research International 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/9842037.

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Fluid-jet-based indentation is used as a noncontact excitation technique by systems measuring the mechanical properties of soft tissues. However, the application of these devices has been hindered by the lack of theoretical solutions. This study developed a mathematical model for testing the indentation induced by a fluid jet and determined a semianalytical solution. The soft tissue was modeled as an elastic layer bonded to a rigid base. The pressure of the fluid jet impinging on the soft tissue was assumed to have a power-form function. The semianalytical solution was verified in detail using finite-element modeling, with excellent agreement being achieved. The effects of several parameters on the solution behaviors are reported, and a method for applying the solution to determine the mechanical properties of soft tissues is suggested.
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Ali, Zeeshan, Shayan Naseri Nia, Faranak Rabiei, Kamal Shah, and Ming Kwang Tan. "A Semianalytical Approach to the Solution of Time-Fractional Navier-Stokes Equation." Advances in Mathematical Physics 2021 (July 16, 2021): 1–13. http://dx.doi.org/10.1155/2021/5547804.

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In this manuscript, a semianalytical solution of the time-fractional Navier-Stokes equation under Caputo fractional derivatives using Optimal Homotopy Asymptotic Method (OHAM) is proposed. The above-mentioned technique produces an accurate approximation of the desired solutions and hence is known as the semianalytical approach. The main advantage of OHAM is that it does not require any small perturbations, linearization, or discretization and many reductions of the computations. Here, the proposed approach’s reliability and efficiency are demonstrated by two applications of one-dimensional motion of a viscous fluid in a tube governed by the flow field by converting them to time-fractional Navier-Stokes equations in cylindrical coordinates using fractional derivatives in the sense of Caputo. For the first problem, OHAM provides the exact solution, and for the second problem, it performs a highly accurate numerical approximation of the solution compare with the exact solution. The presented simulation results of OHAM comparison with analytical and numerical approaches reveal that the method is an efficient technique to simulate the solution of time-fractional types of Navier-Stokes equation.
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Dissertations / Theses on the topic "Semianalytical technique"

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CAMMARANO, SANDRO. "STATIC AND DYNAMIC ANALYSIS OF HIGH-RISE BUILDINGS." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2565549.

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This thesis is focused on the structural behaviour of high-rise buildings subjected to transversal loads expressed in terms of shears and torsional moments. As horizontal reinforcement, the resistant skeleton of the construction can be composed by different vertical bracings, such as shear walls, braced frames and thin-walled open section profiles, having constant or variable geometrical properties along the height. In this way, most of the traditional structural schemes can be modelled, from moment resisting frames up to outrigger and tubular systems. In particular, an entire chapter is addressed to the case of thin-walled open section shear walls which are defined by a coupled flexural-torsional behaviour, as described by Vlasov’s theory of the sectorial areas. From the analytical point of view, the three-dimensional formulation proposed by Al. Carpinteri and An. Carpinteri (1985) is considered and extended in order to perform dynamic analyses and encompass innovative structural solutions which can twist and taper from the bottom to the top of the building. Such approach is based on the hypothesis of in-plane infinitely rigid floors which assure the connection between the vertical bracings and, consequently, reduce the number of degrees of freedom being only three for each level. By means of it, relevant design information such as the floor displacements, the external load distribution between the structural components, the internal actions, the free vibrations as well as the mode shapes can be quickly obtained. The clearness and the conciseness of the matrix formulation allow to devise a simple computer program which, starting from basic information as the building geometry, the number and type of vertical stiffening, the material properties and the intensity of the external forces, provides essential results for preliminary designs.
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Books on the topic "Semianalytical technique"

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V, Kaza K. R., and United States. National Aeronautics and Space Administration., eds. A semianalytical technique for sensitivity analysis of unsteady aerodynamic computations. [Washington, DC]: National Aeronautics and Space Administration, 1988.

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Book chapters on the topic "Semianalytical technique"

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Suk, Heejun, Byung-Gon Chae, and Junghae Choi. "Semianalytical Solutions for Multispecies Transport Coupled with a Sequential First-Order Reaction Network Using GITT Techniques." In Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment, 45–49. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-18663-4_8.

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Halin, H. J., S. A. R. Hepner, and H. P. Geering. "The Usefulness of Semianalytical Integration Techniques for Solving Optimal Control Problems Demonstrated by Means of an Example from the Area of Robotics." In Informatik-Fachberichte, 271–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70640-0_38.

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Conference papers on the topic "Semianalytical technique"

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MURTHY, DURBHA, and KRISHNA KAZA. "Application of a semianalytical technique for sensitivity analysis of unsteady aerodynamic computations." In Advanced Marine Systems Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1988. http://dx.doi.org/10.2514/6.1988-2377.

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Rizk, Nader K., and Duane A. Smith. "Regional and Business Aircraft Mission Emissions." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-300.

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To meet the design requirements of next generation aircraft engines and the expected trends of more stringent emissions regulations, better calculation methods for aircraft mission emissions need to be established. In the present investigation, a number of steps were taken to define an appropriate calculation technique. The data obtained for a full-scale annular combustor rig were compared with engine emissions to illustrate that the level of rig-to-engine agreement was good enough to use the rig data to formulate a proposed mission NOx calculation technique. Conventional methods were then used to correlate the rig data in terms of various operating parameters. It was demonstrated that the level of agreement with data was improved by including both combustion and geometrical aspects in the correlations of NOx, CO, UHC, and smoke. A semianalytical approach, which was based on detailed chemical kinetic scheme and simulated the combustor by a number of reactors representing various combustion zones, was used to correlate the data of the annular combustor. The results illustrated that better estimates of emissions were obtained over conventional methods. Two mission profiles that represented the operation of turbofan-powered regional and business aircrafts were selected to evaluate their mission emissions using the semianalytical method. An approach that utilized only the four ICAO test points in the semianalytical method was formulated to provide the total aircraft mission emissions. Results obtained by this approach were comparable to those calculated using correlations based on extensive testing of the combustor; thus, by using such a method considerable savings in cost and effort could be achieved during combustor development. The results also demonstrated the possibility of correlating the emissions in terms of ambient pressure and temperature and fuel flow rate; thus, accurate estimates of altitude emissions could be obtained.
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Gan, Ronald Gunawan, and T. A. Blasingame. "A Semianalytical p/z Technique for the Analysis of Reservoir Performance from Abnormally Pressured Gas Reservoirs." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2001. http://dx.doi.org/10.2118/71514-ms.

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Batura, Anatolii, Igor Orynyak, and Andrii Oryniak. "Semianalytical Method for the SIF Calculation for a Crack of Arbitrary Shape in Infinite Body." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28383.

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The exact analytical approach for stress intensity factor calculation for an arbitrary shape mode I crack loaded by the polynomial stresses is proposed. The approach is based on the calculation of the crack faces displacement at given loading. The displacement field is presented as a shape function multiplied by an adjustment polynomial. At that the key problem is the solution of well-known inverse task: obtaining the stresses field at the crack faces on the base of a given displacements field. Multiply solution of such task for a whole set of certain displacements base functions (e.g., for the single terms of the adjustment polynomial) allows to get analytical expression which connects stresses and displacements fields. The original semi-analytical technique for integration with subsequent differentiation of well-known singular integral equation of the flat crack problem is developed. The excellent accuracy of the method is confirmed for an elliptic crack as well as for a rectangular one in the infinite 3D body. New results are given for an inner semi-elliptic crack in the infinite body which surfaces are loaded by polynomial stresses up to the 6th order. The importance of choosing the appropriate shape function is demonstrated.
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Zhang, Fengyuan, and Hamid Emami-Meybodi. "Two-Phase Type-Curve Analysis of Flowback Data from Hydraulically Fractured Hydrocarbon Reservoirs." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206312-ms.

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Abstract This study presents a new type-curve method to characterize hydraulic fracture (HF) attributes and dynamics by analyzing two-phase flowback data from multi-fractured horizontal wells (MFHWs) in hydrocarbon reservoirs.The proposed method includes a semianalytical model, as well as a workflow to estimate HF properties (i.e., initial fracture pore-volume and fracture permeability) and HF closure dynamics (through iterating fracture compressibility and permeability modulus).The semianalytical model considers the coupled two-phase flow in the fracture and matrix system, the variable production rate at the well, as well as the pressure-dependent reservoir and fluid properties. By incorporating the contribution of fluid influx from matrix into the fracture effective compressibility, a new set of dimensionless groups is defined to obtain a dimensionless solution for type-curve analysis. The accuracy of the proposed method is tested using the synthetic data generated from six numerical simulation cases for shale gas and oil reservoirs. The numerical validation confirms the unique behavior of type curves during fracture boundary dominated flow and verifies the accuracy of the type-curve analysis in the characterization of fracture properties. For field application, the proposed method is applied to two MFHWs in Marcellus shale gas and Eagle Ford shale oil.The agreement of interpreted results between the proposed method and straight-line analysis not only demonstrates the practicality in field application but also illustrates the superiority of the type-curve method as an easy-to-use technique to analyze two-phase flowback data. The analysis results from both of the field examples reveal the consistency in the estimated fracture properties between the proposed method and long-term history matching.
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Piazza, Andrea, and Martino Vimercati. "Experimental Validation of a Computerized Tool for Face Hobbed Gear Contact and Tensile Stress Analysis." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35911.

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While face milled gears have been widely analyzed, about face hobbed ones only very few studies have been developed and presented. Goal of this paper is to propose the validation of an accurate tool, which was presented by the authors in previous works, aimed to the computerized design of face hobbed gears. Firstly, the mathematical model able to compute detailed gear tooth surface representation on both spiral and hypoid gears will be briefly recalled; then, the so obtained 3D tooth geometry is employed as input for an advanced contact solver that, using a hybrid method combining finite element technique with semianalytical solutions, is able to efficiently carry out both contact analysis under light or heavy loads and stress tensile calculation. The validation analyses will be carried on published aerospace face hobbed spiral bevel gear data comparing measurements of root and fillet stresses. Good agreement with experimental results both in the time scale and in magnitude will be revealed.
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Zhang, Fengyuan, Linjun Zou, Zhenhua Rui, Hamid Emami-Meybodi, and Wei Cui. "A Two-Phase Flowback Type-Curve for Multiscale Fluid Transport in Hydraulically Fractured Shale Reservoirs." In Offshore Technology Conference. OTC, 2022. http://dx.doi.org/10.4043/31982-ms.

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Abstract The quantitative understanding of HF properties guides accurate production forecasts and reserve estimation. Type curve is a powerful technique to characterize hydraulic fracture (HF) and reservoir properties from flowback and long-term production data. However, the two-phase flow of water and hydrocarbon after an HF stimulation together with the complex transport mechanisms in shale nanopores exacerbate the nonlinearity of the transport equation, causing errors in type-curve analysis. Accordingly, we propose a new two-phase type-curve method to estimate HF properties, such as HF volume and permeability of fracture, through the analysis of flowback data of multi-fractured shale wells. The proposed type curve is based on a semianalytical solution that couples the two-phase flow from the matrix with the flow in HF by incorporating matrix influx, slippage effect, stress dependence, and the spatial variation of fluid properties in inorganic and organic pores. For the first time, multiple fluid transport mechanisms are considered into two-phase type-curve analysis for shale reservoirs. We analyze the flowback data from a multi-fractured horizontal well in a shale gas reservoir to verify the field application of the proposed method. The results show that the fracture properties calculated by the type-curve method are in good agreement with the long-time production data.
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Zhang, Fengyuan, Linjun Zou, Zhenhua Rui, Hamid Emami-Meybodi, and Wei Cui. "A Two-Phase Flowback Type-Curve for Multiscale Fluid Transport in Hydraulically Fractured Shale Reservoirs." In Offshore Technology Conference. OTC, 2022. http://dx.doi.org/10.4043/31982-ms.

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Abstract The quantitative understanding of HF properties guides accurate production forecasts and reserve estimation. Type curve is a powerful technique to characterize hydraulic fracture (HF) and reservoir properties from flowback and long-term production data. However, the two-phase flow of water and hydrocarbon after an HF stimulation together with the complex transport mechanisms in shale nanopores exacerbate the nonlinearity of the transport equation, causing errors in type-curve analysis. Accordingly, we propose a new two-phase type-curve method to estimate HF properties, such as HF volume and permeability of fracture, through the analysis of flowback data of multi-fractured shale wells. The proposed type curve is based on a semianalytical solution that couples the two-phase flow from the matrix with the flow in HF by incorporating matrix influx, slippage effect, stress dependence, and the spatial variation of fluid properties in inorganic and organic pores. For the first time, multiple fluid transport mechanisms are considered into two-phase type-curve analysis for shale reservoirs. We analyze the flowback data from a multi-fractured horizontal well in a shale gas reservoir to verify the field application of the proposed method. The results show that the fracture properties calculated by the type-curve method are in good agreement with the long-time production data.
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Dorogoy, Avraham, and Leslie Banks-Sills. "A Rigid Punch on an Elastic Half-Space Under the Effect of Friction: A Finite Difference Solution." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59159.

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The accuracy of the finite difference technique in solving frictionless and frictional advancing contact problems is investigated by solving the problem of a rigid punch on an elastic halfspace subjected to normal loading. Stick and slip conditions between the elastic and the rigid materials are added to an existing numerical algorithm which was previously used for solving frictionless and frictional stationary and receding contact problems. The numerical additions are first tested by applying them in the solution of receding and stationary contact problems and comparing them to known solutions. The receding contact problem is that of an elastic slab on a rigid half-plane; the stationary contact problem is that of a flat rigid punch on an elastic half-space. In both cases the influence of friction is examined. The results are compared to those of other investigations with very good agreement observed. Once more it is verified that for both receding and stationary contact, load steps are not required for obtaining a solution if the loads are applied monotonically, whether or not there is friction. Next, an advancing contact problem of a round rigid punch on an elastic half-space subjected to normal loading, with and without the influence of friction is investigated. The results for frictionless advancing contact, which are obtained without load steps, are compared to analytical results, namely the Hertz problem; excellent agreement is observed. When friction is present, load steps and iterations for determining the contact area within each load step, are required. Hence, the existing code, in which only iterations to determine the contact zone were employed, was modified to include load steps, together with the above mentioned iterations for each load step. The effect of friction on the stress distribution and contact length is studied. It is found that when stick conditions appear in the contact zone, an increase in the friction coefficient results in an increase in the stick zone size within the contact zone. These results agree well with semianalytical results of another investigation, illustrating the accuracy and capabilities of the finite difference technique for advancing contact.
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Smith, Lance C., and Gerard T. Schuster. "Boreholes with washout zones by a semianalytic plus BIE technique." In 1985 SEG Technical Program Expanded Abstracts. SEG, 1985. http://dx.doi.org/10.1190/1.1892622.

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Reports on the topic "Semianalytical technique"

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Hodul, M., H. P. White, and A. Knudby. A report on water quality monitoring in Quesnel Lake, British Columbia, subsequent to the Mount Polley tailings dam spill, using optical satellite imagery. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330556.

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In the early morning on the 4th of August 2014, a tailings dam near Quesnel, BC burst, spilling approximately 25 million m3 of runoff containing heavy metal elements into nearby Quesnel Lake (Byrne et al. 2018). The runoff slurry, which included lead, arsenic, selenium, and vanadium spilled through Hazeltine Creek, scouring its banks and picking up till and forest cover on the way, and ultimately ended up in Quesnel Lake, whose water level rose by 1.5 m as a result. While the introduction of heavy metals into Quesnel Lake was of environmental concern, the additional till and forest cover scoured from the banks of Hazeltine Creek added to the lake has also been of concern to salmon spawning grounds. Immediate repercussions of the spill involved the damage of sensitive environments along the banks and on the lake bed, the closing of the seasonal salmon fishery in the lake, and a change in the microbial composition of the lake bed (Hatam et al. 2019). In addition, there appears to be a seasonal resuspension of the tailings sediment due to thermal cycling of the water and surface winds (Hamilton et al. 2020). While the water quality of Quesnel Lake continues to be monitored for the tailings sediments, primarily by members at the Quesnel River Research Centre, the sample-and-test methods of water quality testing used, while highly accurate, are expensive to undertake, and not spatially exhaustive. The use of remote sensing techniques, though not as accurate as lab testing, allows for the relatively fast creation of expansive water quality maps using sensors mounted on boats, planes, and satellites (Ritchie et al. 2003). The most common method for the remote sensing of surface water quality is through the use of a physics-based semianalytical model which simulates light passing through a water column with a given set of Inherent Optical Properties (IOPs), developed by Lee et al. (1998) and commonly referred to as a Radiative Transfer Model (RTM). The RTM forward-models a wide range of water-leaving spectral signatures based on IOPs determined by a mix of water constituents, including natural materials and pollutants. Remote sensing imagery is then used to invert the model by finding the modelled water spectrum which most closely resembles that seen in the imagery (Brando et al 2009). This project set out to develop an RTM water quality model to monitor the water quality in Quesnel Lake, allowing for the entire surface of the lake to be mapped at once, in an effort to easily determine the timing and extent of resuspension events, as well as potentially investigate greening events reported by locals. The project intended to use a combination of multispectral imagery (Landsat-8 and Sentinel-2), as well as hyperspectral imagery (DESIS), combined with field calibration/validation of the resulting models. The project began in the Autumn before the COVID pandemic, with plans to undertake a comprehensive fieldwork campaign to gather model calibration data in the summer of 2020. Since a province-wide travel shutdown and social distancing procedures made it difficult to carry out water quality surveying in a small boat, an insufficient amount of fieldwork was conducted to suit the needs of the project. Thus, the project has been put on hold, and the primary researcher has moved to a different project. This document stands as a report on all of the work conducted up to April 2021, intended largely as an instructional document for researchers who may wish to continue the work once fieldwork may freely and safely resume. This research was undertaken at the University of Ottawa, with supporting funding provided by the Earth Observations for Cumulative Effects (EO4CE) Program Work Package 10b: Site Monitoring and Remediation, Canada Centre for Remote Sensing, through the Natural Resources Canada Research Affiliate Program (RAP).
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