激振力作用下钢护筒受力分析及局部加强措施的研究

Analysis on Stress of Steel Casing Under Excitation Force and Research on Reinforcement Measures of Part

在对钢护筒进行受力分析时，通常的做法是按照最大荷载乘以冲击系数的方式进行静力分析。而本文将提出一种与实际情况更接近的方法：将激振力按照动力荷载输入，对整个结构进行时程分析，并与静力分析的结果相比较，对比不同分析方法得出的结构的应力峰值和分布情况的区别，最后提出钢护筒的局部加强方案，并验算其受力满足要求。

The usual practice is to carry out static analysis according to multiply the impact coefficients and the largest load factor when analyzes stress of the steel casing. But the paper will propose a method which is closer to actual fact： imports the excitation force in accordance dynamic load and analyzes time - histories of whole structure, compares it to static analysis result, obtains difference of structure peak stress and distribution, and finally puts forward part reinforcement project of steel casing and checks its force requirement.