TUNING THE PROPAGATION CHARACTERISTICS OF THE TRAPPED AND RELEASED STRONGLY NONLINEAR SOLITARY WAVES IN 1-D COMPOSITE GRANULAR CHAIN OF SPHERES
TUNING THE PROPAGATION CHARACTERISTICS OF THE TRAPPED AND RELEASED STRONGLY NONLINEAR SOLITARY WAVES IN 1-D COMPOSITE GRANULAR CHAIN OF SPHERES
复制标题
调节一维复合颗粒球链中捕获和释放的强非线性孤立波的传播特性
DOI：
10.2140/jomms.2019.14.343
复制
发表时间：
2019-05-01
影响因子：
0.9
通讯作者：
He, Cunfu
中科院分区：
文献类型：
--
作者：
Wu, Bin;Wang, Heying;He, Cunfu
在一维重颗粒链中插入轻颗粒链后，所形成的复合链可以在轻链中捕获强非线性孤立波，轻链可以降低与链端颗粒接触的物体上脉冲波的峰值幅度。然而，光节链的性质对捕获和输出脉冲波的传播速度和幅度的影响尚不清楚。本研究建立了具有最佳参数的有限元模型，以研究输出脉冲波的多次反射行为。仿真和实验结果均表明，光节链可以作为一种物理调节器，调节复合链中输出脉冲波的性质。当光粒子的材料固定时，输出脉冲波的传播速度和振幅都随着光粒子数的增加呈指数下降趋势。与黄铜的轻截面链相比，PTFE链对脉冲波的振幅衰减更严重，降低了输出脉冲波的传播速度。即使在宏观尺度下，所研究的复合链也可以通过调节轻粒子的材料和数量来定量地调节捕获和输出脉冲波的传播特性。
After a chain composed of light particles is inserted into a one-dimensional heavy granular chain of spheres, the formed composite chain can trap strongly nonlinear solitary waves (SNSWs) in a light sectional chain The light sectional chain can reduce the peak amplitude of pulse waves imposed on the objects contacting with the end particle of the chain. However, the effects of the light sectional chain's properties on the propagation velocity and amplitude of both the trapped and output pulse waves are unclear. In this study, finite element models with optimal parameters were established to investigate the multireflection behaviors of the output pulse waves. Both the simulation and experimental results demonstrated that the light sectional chain could act as a physical regulator to tune the properties of the output pulse waves in the composite chain. When the material of the light particle was fixed, both the propagation velocity and amplitude of the output pulse waves exhibited the exponentially downward trend as the number of light particles increased. Compared to the light sectional chain of Brass, the PTFE chain could cause more serious attenuation on the amplitude of the pulse waves and reduce the propagation velocity of the output pulse waves Similar phenomena had been reported in simulation results only at the nanoscale. Even at the macroscale, the investigated composite chain could quantitatively tune the propagation characteristics of the trapped and output pulse waves by adjusting the material and number of light particles.