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通过设定炉内换热器管阵列的纵向节距、横向节距和钢管直径等几何参数以及温度等环境参数,根据声子晶体理论,采用Matlab软件计算声波通过顺排和错排阵列后透射波的带隙宽度,并利用Comsol软件对其进行模拟验证,得到炉内换热器管阵列对声传播特性的影响.结果表明:声音穿过管阵列后会产生声波带隙,T-X方向第一带隙中心频率位置与管阵列的结构参数和环境温度有关,其带隙宽度与填充率有关,通常情况下错排阵列比顺排阵列的透声性能差;当填充率相同时,错排阵列的隔声频率比顺排阵列高;顺排阵列的第一带隙宽度随着填充率的增加而增大,错排阵列在填充率为0.38时的带隙最宽;在填充率小于0.23的范围内,错排阵列的隔声效果比顺排阵列好.
By setting geometric parameters such as longitudinal pitch, transverse pitch and diameter of steel pipe and temperature and other environmental parameters, according to the theory of phononic crystals, using Matlab software to calculate the sound wave through the row and the wrong row array after the transmission Wave band gap.The simulation results show that the tube array has an effect on the acoustic propagation characteristics by the Comsol software.The results show that the acoustic bandgap is generated when the sound passes through the tube array and the first The band gap center frequency is related to the structural parameters of the tube array and the ambient temperature. The band gap width is related to the filling rate. Usually, the misalignment array has poorer sound transmission performance than the parallel array. When the filling rates are the same, The frequency of sound insulation is higher than that of the parallel array; the first band gap width of the parallel array increases with the increase of the filling rate, and the band gap of the staggered array is the widest at the filling rate of 0.38; at the filling rate of less than 0.23 Within the range, staggered array sound insulation effect than the cis array.