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Free vibration analysis of cracked thin plates by quasi-convex coupled isogeometric-meshfree method

Hanjie ZHANG,Junzhao WU,Dongdong WANG

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 405-419 doi: 10.1007/s11709-015-0310-1

Abstract: The free vibration analysis of cracked thin plates via a quasi-convex coupled isogeometric-meshfree methodThis formulation employs the consistently coupled isogeometric-meshfree strategy where a mixed basisThe mixed basis vector simultaneously offers the consistent isogeometric-meshfree coupling in the coupledregion and the quasi-convex property for the meshfree shape functions in the meshfree region, whichThe quasi-convex meshfree shape functions mimic the isogeometric basis function as well as offer the

Keywords： meshfree method     isogeometric analysis     quasi-convex isogeometric-meshfree method     free vibration     cracked    

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Thermo-elastic extended meshfree method for fracture without crack tip enrichment

A. ASADPOUR

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 441-447 doi: 10.1007/s11709-015-0319-5

Abstract: This is the first manuscript presenting an extended meshfree method for thermo- elastic fracture whichThe Lagrange multiplier nodal parameters are discretised with the available meshfree functions.Two benchmark examples illustrate the efficiency of the method.

Keywords： meshfree method     thermo-elasticity    

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A three-dimensional two-level gradient smoothing meshfree method for rainfall induced landslide simulations

Dongdong WANG, Jiarui WANG, Junchao WU, Junjun DENG, Ming SUN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 337-352 doi: 10.1007/s11709-018-0467-5

Abstract: A three-dimensional two-level gradient smoothing meshfree method is presented for rainfall induced landslideThe two-level gradient smoothing for meshfree shape function is elaborated in the three-dimensional Lagrangianrequirement of derivative computation in the present formulation, the two-level smoothed gradient of meshfreeSubsequently, the two-level smoothed gradient of meshfree shape function is employed to discretize theThe effectiveness of the present three-dimensional two-level gradient smoothing meshfree method is demonstrated

Keywords： meshfree method     landslide     rainfall     three-dimensional two-level gradient smoothing     nodal integration    

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A FEniCS implementation of the phase field method for quasi-static brittle fracture

HIRSHIKESH, Sundararajan NATARAJAN, Ratna Kumar ANNABATTULA

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 380-396 doi: 10.1007/s11709-018-0471-9

Abstract: In the recent years, the phase field method for simulating fracture problems has received considerableThis is due to the salient features of the method: 1) it can be incorporated into any conventional finiteThe present work discusses the implementation of the phase field method for brittle fracture within the

Keywords： phase field method     FEniCS     brittle fracture     crack propagation     variational theory of fracture    

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Level set-based isogeometric topology optimization for maximizing fundamental eigenfrequency

Manman XU, Shuting WANG, Xianda XIE

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 2,   Pages 222-234 doi: 10.1007/s11465-019-0534-1

Abstract: In this study, we develop an isogeometric analysis (IGA)-based level set model for the formulation andThe proposed method is based on a combination of level set method and IGA technique, which uses the non-uniformThe method is applied to topology optimization problems of maximizing the fundamental eigenfrequencyA modal track method, that monitors a single target eigenmode is employed to prevent the exchange ofThe validity and efficiency of the proposed method are illustrated by benchmark examples.

Keywords： topology optimization     level set method     isogeometric analysis     eigenfrequency    

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Non-convex sparse optimization-based impact force identification with limited vibration measurements

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0762-2

Abstract: Different from the traditional direct measurement method, the impact force identification technique ismsub>ℓ2 regularization methodTo alleviate such limitations, a novel non-convex sparse regularization method that uses the non-convexThe principle of alternating direction method of multipliers (ADMM) is introduced to tackle the non-convexThe proposed method named Keywords： identification     inverse problem     sparse regularization     under-determined condition     alternating direction method    

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Geometrically constrained isogeometric parameterized level-set based topology optimization via trimmed

Yingjun WANG,David J. BENSON

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 328-343 doi: 10.1007/s11465-016-0403-0

Abstract: an approach based on the fast point-in-polygon (PIP) algorithm and trimmed elements is proposed for isogeometricThe isogeometric parameterized level-set-based TO method, which directly uses the non-uniform rationalNumerical examples demonstrate the efficiency and flexibility of the method.

Keywords： isogeometric analysis     topology optimization     level set method     arbitrary geometric constraint     trimmed element    

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An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 279-293 doi: 10.1007/s11465-019-0575-5

Abstract: shape sensitivity analysis of two benchmark transient heat conduction problems within the framework of isogeometric

Keywords： isogeometric shape optimization     design-dependent boundary condition     transient heat conduction     implicittime integration     adjoint method    

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Isogeometric topology optimization based on energy penalization for symmetric structure

Xianda XIE, Shuting WANG, Ming YE, Zhaohui XIA, Wei ZHAO, Ning JIANG, Manman XU

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 100-122 doi: 10.1007/s11465-019-0568-4

Abstract: We present an energy penalization method for isogeometric topology optimization using moving morphableperiodic symmetric constraint for symmetric structures, and then extend the proposed energy penalization methodThe energy penalization method can solve the problems of numerical instability and convergence for theCompared with the conventional ITO–MMC, the energy penalization method for the ITO–MMC can improve theFor the ITO–MMC under a bilateral symmetric constraint, the proposed method can reduce the objective

Keywords： topology optimization     moving morphable component     isogeometric analysis     energy penalization method     symmetric    

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Featurematching using quasi-conformalmaps Article

Chun-xue WANG, Li-gang LIU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 644-657 doi: 10.1631/FITEE.1500411

Abstract: We present a fully automatic method for finding geometrically consistent correspondences while discardingcan be formulated as a constrained optimization involving both the Beltrami coefficient (BC) term and quasi-conformalmap, and solved by an efficient iterative algorithm based on the variable splitting method.In each iteration, we solve two subproblems, namely a linear system and linearly constrained convex quadratic

Keywords： Feature correspondence     Quasi-conformal map     Splitting method    

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Robust isogeometric topology optimization for piezoelectric actuators with uniform manufacturability

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0683-5

Abstract: The main purpose of the current paper is to propose a robust isogeometric topology optimization (RITO) method for the design of piezoelectric actuators, which can effectively remove the critical issue inducedIn RITO, the isogeometric analysis replacing the conventional finite element method is applied to computeseveral numerical examples are performed to test the effectiveness and efficiency of the proposed RITO method

Keywords： piezoelectric actuator     isogeometric topology optimization     uniform manufacturability     robust formulation    

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dynamic analysis of functionally graded fluid-infiltrated porous skew and elliptical nanoplates using an isogeometric

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 477-502 doi: 10.1007/s11709-023-0918-5

Abstract: nanoplates placed on Pasternak’s two-parameter elastic foundation is performed for the first time using isogeometric

Keywords： static bending     free and forced vibrations     nonlocal theory     isogeometric analysis     fluid-infiltrated    

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A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0006-x

Abstract: A frequency error estimation is presented for the isogeometric free vibration analysis of Kirchhoff–LoveBy analyzing the discrete isogeometric equations with the aid of harmonic wave assumption, the frequencywith these theoretical findings, the 2nd and 4th orders of frequency accuracy are attained for the isogeometricalso manifest an excellent magnitude match between numerical and theoretical frequency errors for the isogeometric

Keywords： isogeometric analysis     Kirchhoff–Love cylindrical shell     free vibration     frequency error     convergence    

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Isogeometric analysis based on geometric reconstruction models

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 782-797 doi: 10.1007/s11465-021-0648-0

Abstract: In isogeometric analysis (IGA), the boundary representation of computer-aided design (CAD) and the tensor-productIn this paper, an IGA method for complex models is presented by reconstructing analysis-suitable modelspolygons or point cloud and is embedded into a regular background grid, and a model reconstruction methodThree 3D examples are used to test the proposed method, and the results demonstrate that the proposedmethod can deal with complex engineering parts reconstructed by boundary polygons or point clouds.

Keywords： isogeometric analysis     reconstruction model     level set function     trimmed element     point cloud    

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Quasi-period Changes of the Operational Parameters for Hot Oil Pipelines

Cui Hui

Strategic Study of CAE 2006, Volume 8, Issue 1,   Pages 51-53

Abstract:

Subjected to the annual changes of the air temperature, the quasi-period rules of the operational

Keywords： hot oil pipeline     air temperature     soil environment     quasi-period    

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Title Author Date Type Operation

Free vibration analysis of cracked thin plates by quasi-convex coupled isogeometric-meshfree method

Hanjie ZHANG,Junzhao WU,Dongdong WANG

Journal Article

Thermo-elastic extended meshfree method for fracture without crack tip enrichment

A. ASADPOUR

Journal Article

A three-dimensional two-level gradient smoothing meshfree method for rainfall induced landslide simulations

Dongdong WANG, Jiarui WANG, Junchao WU, Junjun DENG, Ming SUN

Journal Article

A FEniCS implementation of the phase field method for quasi-static brittle fracture

HIRSHIKESH, Sundararajan NATARAJAN, Ratna Kumar ANNABATTULA

Journal Article

Level set-based isogeometric topology optimization for maximizing fundamental eigenfrequency

Manman XU, Shuting WANG, Xianda XIE

Journal Article

Non-convex sparse optimization-based impact force identification with limited vibration measurements

Journal Article

Geometrically constrained isogeometric parameterized level-set based topology optimization via trimmed

Yingjun WANG,David J. BENSON

Journal Article

An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Journal Article

Isogeometric topology optimization based on energy penalization for symmetric structure

Xianda XIE, Shuting WANG, Ming YE, Zhaohui XIA, Wei ZHAO, Ning JIANG, Manman XU

Journal Article

Featurematching using quasi-conformalmaps

Chun-xue WANG, Li-gang LIU

Journal Article

Robust isogeometric topology optimization for piezoelectric actuators with uniform manufacturability

Journal Article

dynamic analysis of functionally graded fluid-infiltrated porous skew and elliptical nanoplates using an isogeometric

Journal Article

A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells

Journal Article

Isogeometric analysis based on geometric reconstruction models

Journal Article

Quasi-period Changes of the Operational Parameters for Hot Oil Pipelines

Cui Hui

Journal Article