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Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration and noise reduction

Guilian YI, Yunkang SUI, Jiazheng DU

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 229-234 doi: 10.1007/s11465-011-0128-z

Abstract: The K-S function is adopted to process many points’ normal accelerations as the comprehensive index

Keywords： Abaqus secondary development     Python language     vibration and noise reduction     K-S function     vibration acceleration    

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Morphological and mechanical characterization of a PMMA/CdS nanocomposite

Vishal MATHUR, Manasvi DIXIT, K.S. RATHORE, N. S. SAXENA, K.B. SHARMA

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 258-263 doi: 10.1007/s11705-010-1014-7

Abstract: This study reveals that the glass transition temperature ( ), Young’s modulus, and fracture energy of

Keywords： poly(methyl methacrylate) (PMMA)     filler nanoparticles     polymer semiconducting nanocomposite     tensile properties     glass transition temperature    

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Experiment study on fatigue property of concrete filled steel pipe K-joints

Zhong Xingu,Yang Sheng,Shi Weihua

Strategic Study of CAE 2011, Volume 13, Issue 9,   Pages 97-100

Abstract: the truss arch of Xiangtan 4th Bridge, we made fatigue property test on concrete filled steel pipe K-jointsdifferent specifications, and calculated the amplitude of fatigue load of concrete filled steel pipe K-jointsassess fatigue life of concrete filled steel pipe, and fatigue property of concrete filled steel pipe K-jointswas obviously better than that of steel pipe K-joints.Moreover, the S—N curve of concrete filled steel pipe K-joints proposed by this paper would be

Keywords： concrete filled steel pipe K-joints     fatigue property     S—N curve    

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The Strict Avalanche Criterion of Order k Spectral Properties of m-Valued Logical Functions

Guojinhui,LiShiqu

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 45-48

Abstract: paper, in residue class ring Zm, the concept of the strict avalanche criterion of order kThen, by applying probabilistic thought and methods, the rule that a w-valued logical function fulfillsFinally, by Chrestenson cyclic spectrums, a necessary and sufficient condition on a m-valued logical functionis given, which fulfills the strict avalanche criterion of order k.

Keywords： m-valued logical function     Chrestenson cyclic spectrum     auto-correlation function     the strict avalanche    

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Experimental investigation on heat transfer effect of conical strip inserts in a circular tube under laminar flow

ARULPRAKASAJOTHI,K. ELANGOVAN,K. HEMA CHANDRA REDDY,S. SURESH

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 136-142 doi: 10.1007/s11708-015-0389-z

Abstract: The aim of this paper is to observe the Nusselt number and friction factor behavior of the circular tube with conical strip inserts as turbulators in a laminar flow condition, using staggered and non-staggered conical strips with three different twist ratios ( = 2, 3 and 5). The conical strip is inserted in the forward and backward direction individually compared to the flow of water which is the working fluid. The results indicate that the conical strip inserts increases the Nusselt number when compared to the plain surface tube. It is observed that the strip geometry has a major effect on the thermal performance of the circular tube. On examination of different strips for determining the enhancement of Nusselt number, the staggered conical strip with the twist ratio of = 3 has given a better result compared to the other two strips. Finally, correlations have been derived using regression analysis for predicting the Nusselt number and friction factor.

Keywords： Nusselt number     friction factor     conical strip    

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Polyhedral linkages obtained as assemblies of planar link groups

GÖkhan KİPER, Eres SÖYLEMEZ

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 3-9 doi: 10.1007/s11465-013-0363-6

Abstract:

The study aims to devise means of obtaining polyhedral linkages for homothetic deployment of polyhedral shapes by embedding planar link groups in faces of the polyhedral shape of interest. The questions of which polyhedral shapes may be suitable for such a purpose and what are the compatibility conditions for spatially assembling planar link groups are addressed. Homohedral and tangential polyhedral shapes are found to be suitable for the task and some examples of linkages are worked out.

Keywords： polyhedral linkages     homothety     homohedra     tangential polyhedra    

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Bioleaching of copper from pre and post thermally activated low grade chalcopyrite contained ball mill spillage

Sandeep PANDA, Nilotpala PRADHAN, Umaballav MOHAPATRA, Sandeep K. PANDA, Swagat S. RATH, Danda S.SUKLA, Barada K. MISHRA

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2,   Pages 281-293 doi: 10.1007/s11783-013-0484-5

Abstract: Bioleaching of a low grade chalcopyrite (ball mill spillage material) was tested for copper recovery in shake flasks. The original samples (as received) were thermally activated (600°C, 30 min) to notice the change in physico-chemical and mineralogical characteristics of the host rock and subsequently its effect on copper recovery. A mixed culture of acidophilic chemolithotrophic bacterial consortium predominantly entailing strain was used for bioleaching studies and optimization of process parameters of both original and thermally activated samples. Mineralogical characterization studies indicated the presence of chalcopyrite, pyrite in the silicate matrix of the granitic rock. Field emission scanning electron microscopy coupled with Energy dispersive spectroscopy (FESEM-EDS) and X-ray Fluorescence (XRF) analysis indicated mostly SiO . With pH 2, pulp density 10% w/v, inoculum 10% v/v, temperature 30°C, 150 r·min , 49% copper could be recovered in 30 days from the finest particle size (-1+ 0.75 mm) of the original spillage sample. Under similar conditions 95% copper could be recovered from the thermally activated sample with the same size fraction in 10 days. The study revealed that thermal activation leads to volume expansion in the rock with the development of cracks, micro and macro pores on its surface, thereby enabling bacterial solution to penetrate more easily into the body, facilitating enhanced copper dissolution.

Keywords： ball mill spillage     thermal activation     bioleaching     copper    

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Biomechanics of knee joint – A review

Bhaskar Kumar MADETI,Srinivasa Rao CHALAMALASETTI,S K Sundara siva rao BOLLA PRAGADA

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2,   Pages 176-186 doi: 10.1007/s11465-014-0306-x

Abstract:

The present paper is to know how the work is carried out in the field of biomechanics of knee. Various model formulations are discussed and further classified into mathematical model, two-dimensional model and three-dimensional model. Knee geometry is a crucial part of human body movement, in which how various views of knee is shown in different planes and how the forces act on tibia and femur are studied. It leads to know the forces acting on the knee joint. Experimental studies of knee geometry and forces acting on knee shown by various researchers have been discussed, and comparisons of results are made. In addition, static and dynamic analysis of knee has been also discussed respectively to some extent.

Keywords： biomechanics     knee geometry     ligaments     squat     femorotibial joint     finite element method    

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Detection of void and metallic inclusion in 2D piezoelectric cantilever beam using impedance measurements

S. SAMANTA, S. S. NANTHAKUMAR, R. K. ANNABATTULA, X. ZHUANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 542-556 doi: 10.1007/s11709-018-0496-0

Abstract: The aim of current work is to improve the existing inverse methodology of void-detection based on a target impedance curve, leading to quick-prediction of the parameters of single circular void. In this work, mode-shape dependent shifting phenomenon of peaks of impedance curve with change in void location has been analyzed. A number of initial guesses followed by an iterative optimization algorithm based on univariate method has been used to solve the problem. In each iteration starting from each initial guess, the difference between the computationally obtained impedance curve and the target impedance curve has been reduced. This methodology has been extended to detect single circular metallic inclusion in 2D piezoelectric cantilever beam. A good accuracy level was observed for detection of flaw radius and flaw-location along beam-length, but not the precise location along beam-width.

Keywords： piezoelectricity     impedance curve     mode shapes     inverse problem     flaw detection     curve shifting    

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Quantification of hydration products in cementitious materials incorporating silica nanoparticles

GOEL,S. K. BHATTACHARYYA,G. MISHRA

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 162-167 doi: 10.1007/s11709-015-0315-9

Abstract: influence on degree of hydration, porosity and formation of different type of calcium-silicate-hydrate (C-S-HSimilarly, increasing gel porosity reveals the formation of more C-S-H gel.The results show that in presence of silica nanoparticles, ~24% C-S-H (Ca/Si<1.0) forms, leading to theformation of polymerised and compact C-S-H.In case of plain cement this type of C-S-H was completely absent at 28 days.

Keywords： degree of hydration     porosity     calcium-silicate-hydrate (C-S-H)     silica nanoparticles    

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Solving multi-objective optimal power flow problem considering wind-STATCOM using differential evolution

Belkacem MAHDAD, K. SRAIRI

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 75-89 doi: 10.1007/s11708-012-0222-x

Abstract: The proposed strategy was examined and applied to the standard IEEE 30-bus with smooth cost function

Keywords： differential evolution     multi-objective function     optimal power flow     economic dispatch     valve point effect    

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Application of 3S Technologies to Regional Ecological Function Division —A Case of City of Puyang in

Bian Yousheng,Cai Bofeng,Zhao Nan

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 54-60

Abstract: 3S technologies are the important guarantee of the accuracy and feasibility for the ecological functionTaking the city of Puyang in Henan Province as an example, the characteristics and advantages of using 3Stechnologies for ecological function region division are demonstrated.The 3S technologies can make the data much more accurate, more close to the status quo and more scientificthe division process thanks to 3S technologies.

Keywords： ecological function division     3S     spatial analysis     ecological pattern    

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Fatigue crack growth simulations of 3-D linear elastic cracks under thermal load by XFEM

SINGH,S. K. YADAV

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 359-382 doi: 10.1007/s11709-015-0304-z

Abstract: This paper deals with the fatigue crack growth simulations of three-dimensional linear elastic cracks by XFEM under cyclic thermal load. Both temperature and displacement approximations are extrinsically enriched by Heaviside and crack front enrichment functions. Crack growth is modelled by successive linear extensions, and the end points of these linear extensions are joined by cubic spline segments to obtain a modified crack front. Different crack geometries such as planer, non-planer and arbitrary spline shape cracks are simulated under thermal shock, adiabatic and isothermal loads to reveal the sturdiness and versatility of the XFEM approach.

Keywords： 3-D cracks     fatigue life     Paris law     thermal load     XFEM    

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Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach

Balasubramaniyan SARAVANAN, Surbhi SIKRI, K. S. SWARUP, D. P. KOTHARI

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 333-341 doi: 10.1007/s11708-013-0259-5

Abstract: In the present electricity market, where renewable energy power plants have been included in the power systems, there is a lot of unpredictability in the demand and generation. There are many conventional and evolutionary programming techniques used for solving the unit commitment (UC) problem. Dynamic programming (DP) is a conventional algorithm used to solve the deterministic problem. In this paper DP is used to solve the stochastic model of UC problem. The stochastic modeling for load and generation side has been formulated using an approximate state decision approach. The programs were developed in a MATLAB environment and were extensively tested for a four-unit eight-hour system. The results obtained from these techniques were validated with the available literature and outcome was good. The commitment is in such a way that the total cost is minimal. The novelty of this paper lies in the fact that DP is used for solving the stochastic UC problem.

Keywords： unit commitment (UC)     deterministic     stochastic     dynamic programming (DP)     optimization     state diagram    

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Marble epistyles under shear: an experimental study of the role of “Relieving Space”

TRIANTIS, S. K. KOURKOULIS

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 767-786 doi: 10.1007/s11709-019-0515-9

Abstract: shear load, in case of excitations imposing to the epistyles displacements normal to the connector’sAccording to this technique, part of the connector’s web is left uncovered, forming the so-called “ ,

Keywords： monuments of cultural heritage     marble epistyles     pressure stimulated currents     acoustic emission     digital image correlation    

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Title Author Date Type Operation

Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration and noise reduction

Guilian YI, Yunkang SUI, Jiazheng DU

Journal Article

Morphological and mechanical characterization of a PMMA/CdS nanocomposite

Vishal MATHUR, Manasvi DIXIT, K.S. RATHORE, N. S. SAXENA, K.B. SHARMA

Journal Article

Experiment study on fatigue property of concrete filled steel pipe K-joints

Zhong Xingu,Yang Sheng,Shi Weihua

Journal Article

The Strict Avalanche Criterion of Order k Spectral Properties of m-Valued Logical Functions

Guojinhui,LiShiqu

Journal Article

Experimental investigation on heat transfer effect of conical strip inserts in a circular tube under laminar flow

ARULPRAKASAJOTHI,K. ELANGOVAN,K. HEMA CHANDRA REDDY,S. SURESH

Journal Article

Polyhedral linkages obtained as assemblies of planar link groups

GÖkhan KİPER, Eres SÖYLEMEZ

Journal Article

Bioleaching of copper from pre and post thermally activated low grade chalcopyrite contained ball mill spillage

Sandeep PANDA, Nilotpala PRADHAN, Umaballav MOHAPATRA, Sandeep K. PANDA, Swagat S. RATH, Danda S.SUKLA, Barada K. MISHRA

Journal Article

Biomechanics of knee joint – A review

Bhaskar Kumar MADETI,Srinivasa Rao CHALAMALASETTI,S K Sundara siva rao BOLLA PRAGADA

Journal Article

Detection of void and metallic inclusion in 2D piezoelectric cantilever beam using impedance measurements

S. SAMANTA, S. S. NANTHAKUMAR, R. K. ANNABATTULA, X. ZHUANG

Journal Article

Quantification of hydration products in cementitious materials incorporating silica nanoparticles

GOEL,S. K. BHATTACHARYYA,G. MISHRA

Journal Article

Solving multi-objective optimal power flow problem considering wind-STATCOM using differential evolution

Belkacem MAHDAD, K. SRAIRI

Journal Article

Application of 3S Technologies to Regional Ecological Function Division —A Case of City of Puyang in

Bian Yousheng,Cai Bofeng,Zhao Nan

Journal Article

Fatigue crack growth simulations of 3-D linear elastic cracks under thermal load by XFEM

SINGH,S. K. YADAV

Journal Article

Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach

Balasubramaniyan SARAVANAN, Surbhi SIKRI, K. S. SWARUP, D. P. KOTHARI

Journal Article

Marble epistyles under shear: an experimental study of the role of “Relieving Space”

TRIANTIS, S. K. KOURKOULIS

Journal Article