Affected by higher Rayleigh wave modes in the surface wave field,the effective phase velocity obtained by spectral analysis of surface waves(SASW.
由分层介质表面两不同点响应互谱分析(SASW)得到的有效相速度并不对应于面波基阶模态相速度,它与波场中高阶模态能量分配比例有关。
The results show that whether the stiffness profiles are smoothly varying or layered, the fundamental mode dominates the surface wave field and the effective phase velocity approaches to the phase velocity of the mode in far field for the regular profiles.
结果显示,无论剖面刚度是缓变还是分层变化,对规则剖面,表面波场基阶模态占主导地位,远场表面波有效相速度与基阶模态相速度接近;对不规则剖面,表面波场中高阶模态影响较大,影响程度及频率范围与剖面刚度变化有关。
In order to investigate the effects of higher modes and the source on the effective velocity of surface waves,the analytical expressions of effective phase velocity of horizontal and vertical vibrations as well as the approximate expressions in the far field are derived for horizontally layered elastic media by the thin layer stiffness matrix method.
为了研究高阶模态及振源对表面波有效相速度影响,基于薄层刚度矩阵方法,给出了弹性层状地基中表面波水平向及竖直向有效相速度一般解析表达式以及远场渐近表达式,并从能量的角度分析高频、低频有效相速度发展趋势。
Has inferred the formula of ball milling cutter\'s effective diameter and the effective linear velocity,by this further definite spindle speed.
推导了球头铣刀的有效直径和有效线速度的计算公式,以此进一步确定转速,通过试验的方法测定了径向铣削深度和每齿进给量对表面粗糙度的影响。