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对人工模拟爆破震动信号的合成进行了研究.在合成模拟信号时,首先采用某一已知爆破振动加速度信号的反应谱来初步计算出将要模拟的爆破震动信号的功率谱,并将其作为目标谱,然后在所需研究的谱率范围内产生一定数量的均匀分布随机数来作为模拟爆破震动信号的频率。在假设爆破震动信号由不同频率的谐波函数组成的基础上,通过将不同频率的谐波函数叠加来初步合成模拟爆破震动波,同时用振幅窗函数对它进行振幅校正,然后对合成信号与原信号进行功率谱值与反应谱值的相关性检验。
The synthesis of artificial simulated blasting vibration signal was studied.When synthesizing the analogue signal, the response spectrum of a known blasting vibrational acceleration signal was firstly used to calculate the power spectrum of the blasting vibration signal to be simulated first Spectrum, and then generate a certain number of uniformly distributed random numbers within the spectral range of the required study as the frequency of the simulated blasting vibration signal. Based on the assumption that the blasting vibration signal consists of harmonic functions of different frequencies, a preliminary simulating blasting vibration wave is made by superposing harmonic functions of different frequencies, and amplitude correction is performed by using an amplitude window function. Then, The original signal power spectrum and response spectrum value of the test.