河床式厂房结构动力分析计算模型研究

发布时间：2018-02-21 19:16

本文关键词： 河床式厂房动力分析有限元计算模型　出处：《地下空间与工程学报》2017年S2期 　论文类型：期刊论文

【摘要】：结合桐子林水电站河床式厂房,采用三维有限元法开展计算模型基岩范围、边界条件、材料动参数等因素对河床式厂房结构动力计算的影响分析。研究成果表明:计算模型中选取1.5~2.0倍厂房高度的基岩,并在基岩上下游端面和底部施加人工边界进行计算,可以使得计算工作的规模和计算结果的精确性达到最好的平衡;河床式厂房的边界采用人工边界模拟时,人工边界消耗掉了振动能量,厂房典型部位的振动响应减弱,采用人工边界模拟的方法更加符合实际情况;材料动弹性模量及阻尼比的取值对厂房的动力特性影响较小。随着动弹模的增大,厂房结构自振频率会有所提高,振幅有所减小。
[Abstract]:In combination with the riverbed workshop of Tongzilin Hydropower Station, a three-dimensional finite element method is used to calculate the range of bedrock and boundary conditions of the model. The influence of material dynamic parameters on the dynamic calculation of riverbed powerhouse structure is analyzed. The results show that the bedrock of 1.5 ~ 2.0 times plant height is selected in the calculation model, and artificial boundary is applied to the upper and downstream face and bottom of the bedrock. The scale of calculation work and the accuracy of calculation results can reach the best balance. When the boundary of riverbed powerhouse is simulated with artificial boundary, the artificial boundary consumes the vibration energy, and the vibration response of typical parts of the building is weakened. The artificial boundary simulation method is more in line with the actual situation, and the dynamic elastic modulus and damping ratio of the material have little effect on the dynamic characteristics of the powerhouse. With the increase of the dynamic modulus, the natural vibration frequency of the powerhouse structure will increase and the amplitude of the powerhouse structure will decrease.
【作者单位】：中国电建集团成都勘测设计研究院有限公司;
【分类号】：TV731

【相似文献】