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本文用SAP5程序对一座26米水深的导管架平台作了动力分析。为了探讨导管架的单元划分、土与桩共同作用等因素对自振特性的影响,近似将平台作为平面框架来计算、三种平面计算模型算得的频率相差不超过10％,谱响应分析所得结果也比较接近。空间计算模型分别进行自振特性、谱响应和历程响应的计算。按八度地震计算结果表明:平台桩顶的位移比较大,第一振型起主要作用;导管架在潮差段和海底泥面处的腿柱应力值及大部分斜杆应力值都很大。
In this paper, using a SAP5 program for a 26 m water jacket platform made a dynamic analysis. In order to discuss the influence of the unit division of the jacket, the interaction between soil and piles on the natural vibration characteristics, the platform is calculated as a plane frame approximately. The difference between the calculated frequencies of the three plane calculation models is less than 10%. The results of spectral response analysis Also closer. The space calculation model separately calculates the natural vibration response, the spectral response and the course response. The results of the octave earthquake show that the displacements of the top of the platform are relatively large and the first vibration mode plays a major role. The stress values of the leg columns and most of the diagonal bars of the jacket during the tidal range and the seabed mud surface are very large .