Irska Izabela, Kramek Grzegorz, Miądlicki Karol, Dunaj Paweł, Berczyński Stefan, Piesowicz Elżbieta
Department of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology, Szczecin, al. Piastów 19, 70-310 Szczecin, Poland.
Materials (Basel). 2023 Feb 1;16(3):1250. doi: 10.3390/ma16031250.
Structural damping largely determines the dynamic properties of mechanical structures, especially those whose functioning is accompanied by time-varying loads. These loads may cause vibrations of a different nature, which adversely affects the functionality of the structure. Therefore, many studies have been carried out on vibration reduction methods over the last few years. Among them, the passive vibration damping method, wherein a suitable polymer system with appropriate viscoelastic properties is used, emerges as one of the simplest and most effective methods. In this view, a novel approach to conduct passive elimination of vibrations, consisting of covering elements of structures with low dynamic stiffness with polymeric pads, was developed. Herein, polymer covers were manufactured via fused filament fabrication technology (3D printing) and were joined to the structure by means of a press connection. Current work was focused on determining the damping properties of chosen polymeric materials, including thermoplastic elastomers (TPE). All investigated materials were characterized by means of differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), and mechanical properties (tensile test and Shore hardness). Lastly, the damping ability of pads made from different types of polymers were evaluated by means of dynamic tests.
结构阻尼在很大程度上决定了机械结构的动态特性，尤其是那些在运行过程中伴随着时变载荷的结构。这些载荷可能会引起不同性质的振动，从而对结构的功能产生不利影响。因此，在过去几年中已经开展了许多关于减振方法的研究。其中，使用具有适当粘弹性的合适聚合物体系的被动减振方法，成为最简单、最有效的方法之一。基于此，开发了一种通过用聚合物垫覆盖动态刚度较低的结构元件来被动消除振动的新方法。在此，聚合物覆盖层通过熔丝制造技术（3D打印）制造，并通过压接连接到结构上。当前的工作重点是确定所选聚合物材料（包括热塑性弹性体（TPE））的阻尼特性。所有研究材料均通过差示扫描量热法（DSC）、动态机械热分析（DMTA）以及力学性能（拉伸试验和邵氏硬度）进行表征。最后，通过动态测试评估了由不同类型聚合物制成的垫的阻尼能力。
