变截面英文

H型钢是一种截面面积分配更加优化、强重比更加合理的经济断面高效型材，因其断面与英文字母“H”相同而得名。由于H型钢的各个部位均以直角排布，因此H型钢在各个方向上都具有抗弯能力强、施工简单、节约成本和结构重量轻等优点，已被广泛应用。

工字钢也称钢梁(英文名称IBeam),是截面为工字形的长条钢材。工字钢的翼缘由根部向边上逐渐变薄的,有一定的角度,工字钢的型号是用其腰高厘米数，

[Abstract]The deflection crankshaft of appliance beam is similar with the computational formula of steel pipe’s variable cross-section deflection which be educed with integral equation for usual load (concentrated force, concentrated force coupling and uniformly force), and analyze its accuracy. Calculate the deflection of any point on the polygon and round steel pipe. It provides the basis to work out the deflection calculation program for any point of the steel pipe. 供参考，估计可以 钢管杆用steel pipe就可以了，tube是指小的试管、套管等；与应用梁对应，pipe这个词应该更合适