SINGLE-PHASE METAMATERIAL (SPM) AS A DISSIPATER FOR ATTENUATION OF VIBRATION IN TWO-DIMENSIONAL ELASTODYNAMICS PROBLEMS
- سال انتشار: 1398
- محل انتشار: هشتمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله
- کد COI اختصاصی: SEE08_453
- زبان مقاله: انگلیسی
- تعداد مشاهده: 180
نویسندگان
M.Sc. Student of Earthquake Engineering, Faculty of Civil Engineering, Semnan University, Semnan, Iran
M.Sc. Student of Earthquake Engineering, Faculty of Civil Engineering, Semnan University, Semnan, Iran
Assistant Professor of Earthquake Engineering, Faculty of Civil Engineering, Semnan University, Semnan, Iran
چکیده
The propagation of waves at different frequencies can be controlled using metamaterials. In general, a metamaterial cell consists of an inner core with a large mass and a high hardness and an external sheath with low mass and stiffness. These cells are arranged to form an interconnected chain and cause a reduction in vibration by creating a frequency vacuum. In 2014, the laboratorial investigations of Yan and colleagues in the field of implementing metamaterials in structure’s foundation indicate appropriate performance of this system. In 2017, Maleki and Khodakarami (2017) investigated the use of metamaterial in soil to improve seismic performance and reduce in topography vibration. Wagner et al. (2016) investigated a more accurate examination on the use of metamaterials presented relations for the calculation of the frequency vacuum band that causes the vibration reduction. Single phases are another type of metamaterials, in which the inner core and its outer sheath are of the same kind, and the creation of specific geometries has caused the formation of metamaterial cells. Figures 4, 5 and 6 have investigated the use of single-phase metamaterials to reduce the variation.This study investigated the use of SPM to reduce the vibration of a steel plate. The creation of SPM matches the general principles of metamaterials based on the existence of an internal core and an external sheath on steel plates is done using CNC cutting. An example of SPMs is shown in Figure 1. The method of conducting research in finite element software is that a rectangular steel plate with dimensions of 165×105 mm has been investigated by the fixed boundary conditions in two length (see Figure 3). A stimulation according to Figure 2 has been applied to the median 1/3 of the plate’s width, and the responses are taken on the other side.کلیدواژه ها
Metamaterial, Single phase, Attenuation, Frequency gap, Wave propagationاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.