文档介绍：Part 1: Statics
Theoretical Mechanics
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第一篇《静力学》
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Introduction
Statics is the branch of mechanics which studies the laws of equilibria of bodies under the action of force systems.
It mainly studies simplifications and equilibrium conditions of force systems and applications of the corresponding results.
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静力学主要研究:力系的简化和力系的平衡条件及其应用。
引言
静力学是研究物体在力系作用下平衡规律的科学。
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Chapter 1: Fundamental principles
Theoretical mechanics
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第一章静力学基本公理
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§1–1 Fundamental concepts in statics
§1–2 Principles of statics
§1–3 Constraints and their reaction forces
§1–4 Force analysis and force diagrams
Chapter 1: Fundamental
principles of statics and force analysis
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§1–1 静力学的基本概念
§1–2 静力学公理
§1–3 约束与约束反力
§1–4 物体的受力分析与受力图
第一章静力学公理与物体的受力分析
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Chapter 1: Fundamental
principles of statics and force analysis
§1-1 Fundamental concepts in statics
1. Force
1) Concept: the mechanical interaction of bodies is caused by forces. This interaction can change the state of motion of a body.
Effects of forces: ①motion (external effect)
②deformation (internal effect).
3) The three elements:
magnitude, direction and
point of application.
A
F
Statics
4) Unit of force: newton (N) (International System of Units)
kilonewton (kN)
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力的单位: 国际单位制:牛顿(N)
千牛顿(kN)
静力学
第一章静力学基本公理和物体的受力分析
§1-1 静力学基本概念
一、力的概念
:力是物体间的相互机械作用,这种作用可以改变物
体的运动状态。
2. 力的效应: ①运动效应(外效应) ②变形效应(内效应)。
3. 力的三要素:大小,方向,作用点
A
F
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