文档介绍：ENGINEERING MECHANICS
STATICS DYNAMICS &
MECHANICS OF MATERIALS
Mao Dongfeng
What is engineering mechanics?
Engineering mechanics is the branch of physics that
considers the action of forces on bodies or fluids that
are both at rest and in motion. Engineering mechanics
is the branch of engineering that applies the
principles of mechanics to mechanical design.
工程力学是研究工程结构和构件在一定的载荷作
用下的破坏情况, 以及构件形式、尺寸、材料的设计
的科学。
Statics
Introduction
: 研究物体在平衡(Equilibrium)状态下的
科学。即研究物体在力的作用下处于平衡状态的规律
及其应用。
任务:(1) FBD物体的受力分析。
(2) Reducting of (Resultants of) Force
systems力系的简化----即用一简单力系代替原有力系
而不改变其对物体的作用效果。
(3)Equilibrium Equations力系的平衡条件。
reference frames
An inertial reference frame is defined to be any
rigid co-ordinate system in which Newton’s laws
of particle motion relative to that frame are valid
with an acceptable degree of accuracy. In most
design applications used on the surface of the earth,
an inertial frame can be approximated with
sufficient accuracy by attaching the coordinate
system to the earth.