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传统的Rayleigh阻尼系数计算法(两参考振型法)并不总是适用于单层柱面网壳的地震时程分析,对基于多参考振型的Rayleigh阻尼系数计算方法在单层柱面网壳中的应用进行了研究.分析结果表明,在某些地震波作用下,主要贡献振型数目较多,分布较为离散,且频率值相差较大,此种情况下基于多参考振型的计算方法比两参考振型法更为合理;而在另外一些地震波下,结构的主要贡献振型数目较少,分布较为集中,且频率值较为接近,此时基于多参考振型的计算方法和两参考振型法都可以应用.
The traditional Rayleigh damping coefficient calculation method (two reference vibration modes) is not always applicable to the seismic time history analysis of single-layer reticulated shells. The Rayleigh damping coefficient calculation method based on multi-reference vibration modes is applied to single- The results show that under the action of some seismic waves, the number of the main contribution vibration modes is more, the distribution is more discrete, and the difference of the frequency values is larger. In this case, the calculation method based on multiple reference modes Which is more reasonable than the two reference vibration modes. In other seismic waves, the main contributions of the structure are less number of modes, the distribution is more concentrated, and the frequency values are closer to each other. Based on the calculation method of multiple reference modes and two reference Modal method can be applied.