基于分段函数的随机振动功率谱密度值计算

Study on Random Vibration Power Spectrum Density(PSD)Value Calculation Based on Segmental Function

为解决有限元法对结构进行随机振动分析时传统功率谱密度值计算方法的缺点,用分段函数给出了功率谱密度曲线的标准解析表达式和近似解析表达式,简化了功率谱密度值的计算。

In order to avoid the defects of traditional PSD value calculating method when analyzing the structural random vihration with FEA method, the standard analytic expression and the approximate analytic expression of PSD curve are put forward with segmental function, which simplifies the calculation of PSD value.