A high-order finite element model for vibration analysis of cross-laminated timber assemblies
A high-order finite element model for vibration analysis of cross-laminated timber assemblies
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DOI：
10.1177/1351010x17727126
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发表时间：
2017-09-01
影响因子：
1.7
通讯作者：
Rank, Ernst
中科院分区：
文献类型：
--
作者：
Paolini, Alexander;Kollmannsberger, Stefan;Rank, Ernst
用有限元法可以高精度地预测正交层积木构件在低频范围内的振动特性。然而，对交叉层积木构件的建模研究却很少。三维p-版本的有限元法，其特点是分层高阶形函数，非常适合考虑耦合和支持条件。此外，在薄壁结构的情况下，可以获得少量的自由度，使用具有高纵横比和各向异性的无规空间的p-元件。本文提出了一种基于体积高阶有限元的正交层积木材组合体模型。两种代表性类型的连接进行了研究，一个与弹性体之间的交叉层压木材组件和其他没有。对模型进行了验证，确定了代表节点的有限元刚度参数的合适范围。
The vibration behavior of cross-laminated timber components in the low-frequency range can be predicted with high accuracy by the finite element method. However, the modeling of assembled cross-laminated timber components has been studied only scarcely. The three-dimensional p-version of the finite element method, which is characterized by hierarchic high-order shape functions, is well suited to consider coupling and support conditions. Furthermore, a small number of degrees of freedom can be obtained in case of thin-walled structures using p-elements with high aspect ratios and anisotropic ansatz spaces. In this article, a model for cross-laminated timber assemblies made of volumetric high-order finite elements is presented. Two representative types of connections are investigated, one with an elastomer between the cross-laminated timber components and the other without. The model is validated, and suitable ranges for the stiffness parameters of the finite elements which represent the junctions are identified.