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利用等效线性化的方法分析了工程机械结构的间隙非线性振动问题。计算模型采用工程机械中常见的带间隙和初载偏移的非线性系统，给出了这类系统的等效刚度和幅频特性，以便为工程机械的设计提供可能的依据
Equivalent linear method is used to analyze the problem of nonlinear vibration in the gap of construction machinery. The calculation model adopts the nonlinear system with gap and initial load offset common in construction machinery, and gives the equivalent stiffness and amplitude-frequency characteristics of such systems in order to provide a possible basis for the design of construction machinery