A novel approach for automatic reconstruction of boundary condition in structure analysis

Xia, Zhaohui; Wang, Qifu; Liu, Qinghua; Wang, Yingjun; Liu, Jun; Chen, Gang

doi:10.1016/j.advengsoft.2016.02.001

Cited by 11 publications

(7 citation statements)

References 48 publications

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“…An ITO-MMC subjected to a symmetric constraint with an automatic reconstruction of boundary condition [62,63] is under construction. In addition, the computational efficiency of the proposed optimization framework can be largely improved by a GPU algorithm [64], and it needs further research.…”

Section: Discussionmentioning

confidence: 99%

Isogeometric topology optimization based on energy penalization for symmetric structure

Xie

Wang

et al. 2020

Front. Mech. Eng.

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We present an energy penalization method for isogeometric topology optimization using moving morphable components (ITO-MMC), propose an ITO-MMC with an additional bilateral or periodic symmetric constraint for symmetric structures, and then extend the proposed energy penalization method to an ITO-MMC with a symmetric constraint. The energy penalization method can solve the problems of numerical instability and convergence for the ITO-MMC and the ITO-MMC subjected to the structural symmetric constraint with asymmetric loads. Topology optimization problems of asymmetric, bilateral symmetric, and periodic symmetric structures are discussed to validate the effectiveness of the proposed energy penalization approach. Compared with the conventional ITO-MMC, the energy penalization method for the ITO-MMC can improve the convergence rate from 18.6% to 44.5% for the optimization of the asymmetric structure. For the ITO-MMC under a bilateral symmetric constraint, the proposed method can reduce the objective value by 5.6% and obtain a final optimized topology that has a clear boundary with decreased iterations. For the ITO-MMC under a periodic symmetric constraint, the proposed energy penalization method can dramatically reduce the number of iterations and obtain a speedup of more than 2.

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Section: Discussionmentioning

confidence: 99%

Isogeometric topology optimization based on energy penalization for symmetric structure

Xie

Wang

et al. 2020

Front. Mech. Eng.

Self Cite

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“…In addition, this approach requires a strong investment at the early stage of the design to ensure that a CAD model is generated using the appropriate KBE design rules. (Xia et al 2016) proposed a feature-based mechanism to automatically update the boundary conditions (BCs) when the CAD geometry is changed. Defining a BC as a feature in the geometric kernel allows the identification and retrieval of the topological entities affected by the model changes.…”

Section: Existing Cad/cae Integration Modelsmentioning

confidence: 99%

Capturing simulation intent in an ontology: CAD and CAE integration application

Boussuge

Tierney

Vilmart

et al. 2019

Journal of Engineering Design

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Computational simulation is critical in the modern engineering design process. Currently, the use of simulation is limited by the time-consuming process of converting CAD assemblies into FEA models which are efficient to run and yet sufficiently accurate. In addition to the geometric representation of components, analysts require additional knowledge to describe the complete 3D simulation model. To speed up the generation of CAE models from CAD assemblies, we propose to capture high-level modelling and idealisation decisions, characterising the simulation intent, into a knowledge-based CAE model. In this framework, a simulation intent ontology formalises and structures the analysis parameters, the modelling and idealisation decisions. The ontological concepts and relations required to incorporate two of the key capabilities, cellular modelling and equivalencing, are described. Cellular modelling introduces the concept of cells, which subdivide the 3D space, and to which simulation attributes can be attached. Equivalencing maintains the link between different representations of the cells required for different analyses throughout the analysis lifecycle. Illustrative examples show how the knowledge-based CAE model is used to manage the idealisation decisions and to apply inference rules replicating current modelling practices.

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“…The functions of these middleware tools include model simplification, 25,26 rapid generation of high-quality mesh, 27–29 hybrid dimension analysis model generation 30,31 and repeated loading of boundary conditions. 32 The purpose of these studies is to generate acceptable 2D/3D mesh models for CAE analysis.…”

Section: Literature Reviewmentioning

confidence: 99%

An analysis-oriented parameter extraction method for features on freeform surface

Tao

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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The features on freeform surface are common in products with complex curved surfaces, such as gas film holes attached on turbine blade surface or pressing head on the multi-spots bending press. The freeform surfaces generally have tiny geometric structure, the large number and regular arrangement, which makes it hard to extract analysis parameters from CAD structures and construct equivalent analysis features. Therefore, the analysis models generation will be accelerated if parameters for analysis could be extracted automatically rather than manually. In this paper, the analysis-oriented parameter extraction problem is proposed and analyzed. The geometry pattern parameter and physical attribute parameter are summarized and defined as the research kernel based on common analysis scenarios. Based on Hough transform and k-means clustering method, a geometry pattern parameter extraction method is proposed, which can convert analytic criterion of extraction requirements into clear pattern recognition problems. A physical attribute parameter extraction method based on rule reasoning is also put forward to extract numeric analysis parameters with physical meanings. Finally, two representative cases are taken to illustrate the implementation steps of the proposed method, and to verify the effectiveness and practicability in engineering. The instance demonstrates that the proposed method could significantly reduce the time consumption of analysis model generation and improve the integration degree of CAD/CAE.

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A novel approach for automatic reconstruction of boundary condition in structure analysis

Cited by 11 publications

References 48 publications

Isogeometric topology optimization based on energy penalization for symmetric structure

Isogeometric topology optimization based on energy penalization for symmetric structure

Capturing simulation intent in an ontology: CAD and CAE integration application

An analysis-oriented parameter extraction method for features on freeform surface

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