§15-4 两个自由度体系的自由振动

§15-1 动力计算概述 §15-2 单自由度体系的自由振动

§10-1 超静定结构的组成和超静定次数 §10-2 力法的基本概念 §10-3 超静定刚架和排架

2-1几何构造分析的几个概念 2-2平面几何不变体系的组成规则 2-3平面杆件体系的计算自由度

一、简答题(本大题共5小题,每小题5分,共25分) 1.写出结构振动的自由度(不考虑结构的轴向变形)

一、答题(本大题共5小题,每小题5分,共25分) 1.写出结构振动的自由度(不考虑结构的轴向变形)

6-1概述 一、结构的位移Displacement of Structures) 二、计算位移的目的

Recall the definition of stress: o stress =\intensity of internal force at a point\ Figure 3.1 Representation of cross-section of a general body

As we've previously noted, we may often want to describe a structure in various axis systems. This involves... Transformations (Axis, Deflection, Stress, Strain, Elasticity Tensors) e.g., loading axes material principal axis Figure 7.1 Unidirectional Composite with Fibers at an Angle

There are many structural configurations where we do not have to deal with the full 3-D case. First let's consider the models Let's then see under what conditions we can apply them A. Plane Stress