采集不同类型，不同额定起重量起重机一段时间内相应起重量的工作次数数据，以模拟出危险点处相应的载荷谱。
Load spectrum of danger points was simulated by collecting the working frequency of different types of cranes in a period time.
采集不同类型，不同额定起重量起重机一段时间内相应起重量的工作次数数据，以模拟出危险点处相应的载荷谱。
Load spectrum of danger points was simulated by collecting the working frequency of different types of cranes in a period time.
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