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Design and analysis of strut-based lattice structures for vibration isolation

机译：基于杆的隔振结构设计与分析

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This paper presents the design, analysis and experimental verification of strut-based lattice structures to enhance the mechanical vibration isolation properties of a machine frame, whilst also conserving its structural integrity. In addition, design parameters that correlate lattices, with fixed volume and similar material, to natural frequency and structural integrity are also presented. To achieve high efficiency of vibration isolation and to conserve the structural integrity, a trade-off needs to be made between the frame’s natural frequency and its compressive strength. The total area moment of inertia and the mass (at fixed volume and with similar material) are proposed design parameters to compare and select the lattice structures; these parameters are computationally efficient and straight-forward to compute, as opposed to the use of finite element modelling to estimate both natural frequency and compressive strength. However, to validate the design parameters, finite element modelling has been used to determine the theoretical static and dynamic mechanical properties of the lattice structures. The lattices have been fabricated by laser powder bed fusion and experimentally tested to compare their static and dynamic properties to the theoretical model. Correlations between the proposed design parameters, and the natural frequency and strength of the lattices are presented.
机译：本文介绍了基于支杆的晶格结构的设计，分析和实验验证，以增强机架的机械振动隔离性能，同时还保留其结构完整性。此外，还提出了将具有固定体积和类似材料的晶格与固有频率和结构完整性相关联的设计参数。为了获得高效率的隔振效果并保持结构完整性，需要在框架的固有频率与其抗压强度之间进行权衡。提出了总的惯性矩和质量（在固定体积和类似材料的情况下）的设计参数，以比较和选择晶格结构；与使用有限元建模来估计固有频率和抗压强度相比，这些参数在计算上是高效且直接的。但是，为了验证设计参数，已使用有限元建模来确定晶格结构的理论静态和动态力学性能。晶格已经通过激光粉末床熔合制造，并经过实验测试，以将其静态和动态特性与理论模型进行比较。提出了设计参数之间的相关性，以及晶格的固有频率和强度。

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