In order to understand the earthquake resistant safety of the dam, the aseismic strength of the dam is verified both by response spectral method and time-history method.
为了了解大坝的抗震安全度，用反应谱法和振型迭加法对坝体的抗震强度进行了校核。
The frequency response of the transducers is measured experimentally using laser ultrasound and a pulse echo reflecting method. The spectral analysis results are compared and analyzed.
由激光超声方法和自发自收脉冲反射法实验测定了所制作的换能器的频率响应，并比较了频谱分析结果。
This paper studies the Characteristics of the first three spectral moments for the response of linear systems under the space-interrelated ground motion model and an analytical method.
本文研究了在空间相关地面运动数学模型下线性体系振动反应的前三阶谱矩的特点和它们的解析计算方法。
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