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首页> 外文期刊>Computer Assisted Mechanics and Engineering Sciences >Application and analysis of an adaptive wave-based technique based on a boundary error indicator for the sound radiation simulation of a combustion engine model
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Application and analysis of an adaptive wave-based technique based on a boundary error indicator for the sound radiation simulation of a combustion engine model

机译：基于边界误差指标的自适应波基技术在内燃机声辐射模拟中的应用与分析

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摘要

In recent years, Trefftz methods have received increasing attention, as being alternatives of the already well-established element-based simulation methods (e.g., finite element and boundary element methods). The wave-based technique is based on the indirect Trefftz approach for the solution of steady-state, time-harmonic acoustic problems. The dynamic field variables are expanded in terms of wave functions, which satisfy the governing partial differential equation, but do not necessarily satisfy the imposed boundary conditions. Therefore, the approximation error of the method is exclusively caused by the error on the boundary, since there is no additional error present in the domain. The authors investigate the potentials of a novel boundary error indicator-controlled adaptive local refinement strategy. Practical, industrial-oriented application of the method is presented on the 3D free-field sound radiation model of a simplified combustion engine. Results and efficiency of the approach are compared to a priori, frequency-dependent global refinement strategies.
机译：近年来，作为已经建立的基于元素的模拟方法（例如，有限元和边界元方法）的替代方法，Trefftz方法受到越来越多的关注。基于波的技术基于间接Trefftz方法，用于解决稳态，时谐波声学问题。动态场变量根据波动函数扩展，该波动函数满足控制的偏微分方程，但不一定满足施加的边界条件。因此，该方法的近似误差仅由边界误差引起，因为在域中不存在其他误差。作者研究了新型边界误差指标控制的自适应局部细化策略的潜力。在简化的内燃机的3D自由场声辐射模型上介绍了该方法的实际，面向工业的应用。该方法的结果和效率与先验的，频率相关的全局优化策略进行了比较。

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