《理论力学 Theoretical Mechanics——静力学》PPT教学课件（双语）：第一章 静力学基本公理和物体的受力分析 Statics

Theoretical Mechanics Part 1: Statics

1 Theoretical Mechanics

理论力学 第一学

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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

3 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

引言 静力学是研究物体在力系作用下平衡规律的科学。 静力学主要研究:力系的简化和力系的平衡条件及其应用

4 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

Theoretical mechanics Chapter 1: Funcamental principles

5 Theoretical mechanics

理论力学 第→掌净力学亦念 和物称的受方分折

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Chapter 1: Fundamental principles of statics and force analysis D81-1 Fundamental concepts in statics D81-2 Principles of statics 心§1-3 Constraints and their reaction forces □§1-4 Force analysis and force diagrams

7 §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

第一章静力学公理与物体的受力分析 §1-1静力学的基本概念 四§1-2静力学公理 回§1-3约束与约束反力 §1-4物体的受力分析与受力图

8 §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

Statics Chapter 1: Fundamental principles of statics and force analysis 8 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. 2)Effects of forces: Omotion(external effect) @deformation(internal effect) 3)The three elements: F magnitude. direction and point of application. 4)Unit of force: newton(N(International System of Units) kilonewton (KN)

9 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. 2) Effects of forces: ①motion (external effect) ②deformation (internal effect). 3) The three elements: magnitude, direction and point of application. F A 4) Unit of force: newton (N) (International System of Units) kilonewton (kN)

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 、力的概念 1.定义: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 F 力的单位:国际单位制:牛顿(N) 千牛顿(kN 10

10 力的单位： 国际单位制：牛顿(N) 千牛顿(kN) 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 1．定义：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 F A