本文论述多简谐干扰下楼板上任意点的位移反应是各态历经随机过程。以大量的计算、统计为依据,分析和寻求位移反应的概率分布。提出当机器台数不少于四台时。反应可假定为正态分布,从而给出最大合成振幅的估计值及其可靠度。所得结果表明,目前流行的平方和开方的合成方法的可靠度偏低。 In this paper, the displacement response at any point on the floor under multi-harmonic interference is a stochastic process. Based on a large number of calculations and statistics, the probability distribution of displacement response is analyzed and sought. It is proposed when the number of machines is not less than four. The response can be assumed to be a normal distribution, giving an estimate of the maximum synthetic amplitude and its reliability. The results obtained show that the reliability of the currently popular square sum formula is low.