TY - JOUR
T1 - Low Frequency Bandgap Characteristics of Three-dimensional Local Resonance Phononic Crystal
AU - Gao, Nansha
AU - Hou, Hong
N1 - Publisher Copyright:
© 2018, Materials Review Magazine. All right reserved.
PY - 2018/1/25
Y1 - 2018/1/25
N2 - A kind of three-dimensional local resonance phononic crystal structure was proposed. By FEM calculation, low frequency bandgap characteristic, multiple vibration coupling mechanism and corresponding influence factors of geometric parameters were analyzed. Results show that this kind of structure can open ultra-low frequency bandgap under 50 Hz and critical factor is the vibration coupling effect between the matrix material and cylindrical harmonic oscillator. The more vibration displacement of lower surface on cylindrical harmonic oscillator is, the wider bandgap is. Density of middle oblique bar has no effect on the lower edge of bandgap, but makes the upper edge of bandgap move to the higher frequency range, and hence results in the change of bandgap. Length of middle oblique S2 section and angle of S1 section are the most important factor in bandgap. This study enriches the design and the equivalent model of three-dimensional phononic crystal frequency structure, which possesses a certain guiding value in engineering application.
AB - A kind of three-dimensional local resonance phononic crystal structure was proposed. By FEM calculation, low frequency bandgap characteristic, multiple vibration coupling mechanism and corresponding influence factors of geometric parameters were analyzed. Results show that this kind of structure can open ultra-low frequency bandgap under 50 Hz and critical factor is the vibration coupling effect between the matrix material and cylindrical harmonic oscillator. The more vibration displacement of lower surface on cylindrical harmonic oscillator is, the wider bandgap is. Density of middle oblique bar has no effect on the lower edge of bandgap, but makes the upper edge of bandgap move to the higher frequency range, and hence results in the change of bandgap. Length of middle oblique S2 section and angle of S1 section are the most important factor in bandgap. This study enriches the design and the equivalent model of three-dimensional phononic crystal frequency structure, which possesses a certain guiding value in engineering application.
KW - Finite element analysis
KW - Low frequency bandgap
KW - Multiple vibration coupling
KW - Phononic crystal
UR - http://www.scopus.com/inward/record.url?scp=85048229320&partnerID=8YFLogxK
U2 - 10.11896/j.issn.1005-023X.2018.02.032
DO - 10.11896/j.issn.1005-023X.2018.02.032
M3 - 文章
AN - SCOPUS:85048229320
SN - 1005-023X
VL - 32
SP - 322
EP - 326
JO - Cailiao Daobao/Materials Reports
JF - Cailiao Daobao/Materials Reports
IS - 1
ER -