1.結(jié)構(gòu)的位移 Displacements of structures
線位移：結(jié)構(gòu)某點(diǎn)移動(dòng)的距離（）Linear displacements or translation: the distance of movement of a point alone a line;
角位移（轉(zhuǎn)角）：結(jié)構(gòu)構(gòu)件某截面轉(zhuǎn)的角度（）Angular displacement or rotation:sectional rotation of a member of a structure.
相對(duì)（線）位移：兩點(diǎn)之間距離變化
Relative linear displacement: the change of the distance between 2 points.
相對(duì)角位移（轉(zhuǎn)角）：兩截面之間夾角變化 Relative angular displacement:the change of the angle between 2 sections.
2.廣義位移的概念 Generalized displacements
為便于進(jìn)行理論分析和公式推導(dǎo)，將所討論的各種結(jié)構(gòu)位移用統(tǒng)一的符號(hào)來(lái)表示—，稱(chēng)為廣義位移。For the convenience of the proceeding of theoretical analysis and derivation of formulae, we denote all kinds of displacements by , which is termed as generalized displacements
注Remark：廣義位移可以看成為代表位移的抽象符號(hào)，在具體問(wèn)題中表示具體位移. Generalized displacements may be looked at as abstract sign, which represents concrete displacement in concrete problems.
