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对安装在上海佘山地震台的 YRZ-2型压容式钻孔应变仪的观测资料分别进行了未经海潮改正和经过海潮改正的调和分析计算。结果表明:(1)各主要半日波的勒甫数 l_2与根据 Gutenberg-Bullen 地球模型 A 计算而得到的结果接近;(2)各主要日波的勒甫数 l_2较半日波明显地小,这可能是传感器和井壁之间的耦合状况以及整个观测系统的频响特征所致;(3)在上海,海潮负荷引起的应变效应在数值上与起潮力直接引起的应变效应相当,经海潮改正后,计算结果的精度有显著提高。
The observed data of YRZ-2 type pressure-tolerant drilling strain gauge installed at Sheshan Seismic Station in Shanghai were respectively analyzed and reconstructed without tide correction and tide correction. The results show that: (1) The Levu number l_2 of each major semi-daily wave is close to that calculated according to Gutenberg-Bullen Earth model A; (2) The Levu number l_2 of each major daily wave is significantly smaller than that of the semi-day wave (3) In Shanghai, the strain effect caused by the ocean tide load is numerically proportional to the strain effect caused by the tide force directly. After the tide After correction, the accuracy of the calculation results have been significantly improved.