频率测定 meaning in Chinese

determination of frequency
frequency measurement

During the low strain dynamic test of the foundation pile , the adoption of the velocity sensor to the direct measurement of the relative displacement of the pile head is helpful to reducing the improper dependence upon the measured intrinsic frequency valuesof the pile soil system in calculating vertical bearing capacity of the single pile , and is hence conducive to raising the accuracy of the calculated vertical bearing capacity of the single pile
基桩低应变动测中，采用速度传感器直接测出桩头的相对位移，在推算单桩竖向承载力时，有助于降低对桩土体系固有频率测定值的过分依赖，从而有利于提高单桩竖向承载力推算值的准确程度。