基于谐响应分析的设备基础设计方案优化

设备基础通常要承受较大的动力荷载作用,但其振幅响应又不能过大。以某地铁线路大型风机为例,基础设计时考虑了5种方案。通过采用大型有限元计算软件Ansys建立各种方案的有限元模型,同时考虑土-结构间的相互作用,进行多种土层参数情况下的动力特性及谐响应分析。通过对比基本方案的振幅计算结果与实测结果,证明了该分析方法的准确性。总结出了类似工程基础设计时较为经济有效的优化方向及优化原则。

Design Optimization of Metro Equipment Foundation Based on Harmonic Response Analysis

Equipment foundation generally needs to bear larger hydrodynamic load,but large amplitude response is not permitted.Taking a large fan foundation on metro line as an example,five different schemes are considered in the foundation design.Large finite element Ansys software is used to establish models for various schemes,with full consideration of the interaction between soil and structure,the dynamic properties and harmonic response are calculated in condition of various soil parameters.The amplitude calculation results of the basic scheme are compared with measured data,the accuracy of this analysis method is proved.At last,effective optimization direction and optimization principles for similar projects are summarized.