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Simulation of a set of large-size thermal enclosures by a substructured reduced-order model

机译：通过子结构衰减级模型仿真一组大尺寸热围栏

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摘要

In the context of simulations of coupled thermal enclosures, we present here a substructuring technique adapted to the amalgam reduced-order modal model (AROMM). This technique consists of splitting the geometry into different zones. A modal model is then applied to each zone, and the coupling of the resulting models is performed via a thermal contact resistance. This technique allows the consideration of physical thermal resistances between different components of the geometry, as well as the making of fictitious cuts within a continuous domain, when its large size causes difficulties in obtaining the global reduced model. Applied to the simulation of a simplified component of a liquefied natural gas carrier, the use of a sub-structured model with 200 modes allows an access to the whole temperature field with a maximum difference near 1 K and an average difference of the order of 0.2 K, compared with a conventional Lagrange finite-element model of shell type, which requires 60 times longer calculation.
机译：在耦合热外壳的模拟的背景下，我们在此存在适用于汞合金下降阶模型（AROMM）的子结构技术。该技术包括将几何形状分成不同的区域。然后将模态模型施加到每个区域，并且通过热接触电阻执行所得型号的耦合。该技术允许考虑几何形状的不同部件之间的物理热阻，以及在连续域内的虚拟切割时，当其大尺寸导致获得全局减少模型时，当其大尺寸导致困难时。应用于液化天然气载体的简化组件的模拟，使用具有200个模式的子结构化模型允许访问全温场，最大差异接近1 k，平均差异为0.2 K，与壳牌类型的传统拉格朗日有限元模型相比，计算计算需要60倍。

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