【摘要】 通过模型试验研究了直埋式10 k V XLPE电缆击穿振动在砂土中的传播衰减特性,分别用指数衰减、负乘幂衰减公式对试验数据进行拟合,并验证公式的合理性.结果表明:指数衰减、负乘幂衰减公式均可用于描述电缆击穿振动在砂土中的传播衰减特性,相关系数均在0.97以上;振动波在近处衰减快,远处衰减慢;砂土的指数衰减系数为0.0704、乘幂衰减系数为1.3494.更多还原

【Abstract】 This paper deals with the propagation attenuation behaviors of the breakdown vibration of the directburied 10 k V XLPE cable in sand by means of the model experiment. The experimental data are fitted respectively by using the exponential decay formula and the negative power attenuation formula,and the reasonableness of the formulas is verified. The results show that( 1) both the exponential decay formula and the negative power attenuation formula can be used to describe the propagation attenuation behaviors of the cable breakdown vibration in sand,and their correlation coefficients are both more than 0. 97;( 2) the vibration wave attenuates quickly in the vicinity and slowly in the distance; and( 3) the exponential decay coefficient and the power attenuation coefficient of sand are respectively 0. 070 4 and 1. 349 4.更多还原