工程力学双语课件ch01-Basic Concepts

单击此处编辑标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Statics and Strength of Materials,Wang Ming-,lu,Chapter 1: Basic Concepts,Chapter Objectives,1. Perform numerical computations and conversions using U.S. customary units and the SI.,2. Use standard trigonometric formulas in the analysis of right and oblique triangles.,3. Solve groups of two and three simultaneous linear equations.,Specialized Vocabulary,S,tatics:,静力学,静止状态,静态,M,echanics:,力学,机械学,Strength,：强度,E,quilibrium:,平衡,Unit:,个体, (,计量,),单位, ,数学,最小的整数,Customary unit:,惯用单位，常用单位,SI,：,International System of Units,国际单位制,W,eight,：重量,M,ass,：质量,What is Mechanics?,1.1 Introduction,Mechanics is fully connected with our daily life,Crane,How much balance weight shall be placed here?,Statics (,静力学,),Equilibrium(,平衡,),1.1 Introduction,Crane,Strength,(,强度,),Internal forces of truss (,桁架内力,),1.1 Introduction,A photo of rolling wheel,Distinct,Indistinct,Why?,Why?,Kinematics (,运动学,),Planar motion of rigid body,1.1 Introduction,Mechanics and bridge.,On Jan.4,，,1999,，,The rainbow bridge which was located in Sichuan province, collapsed while a group of soldier passed over it. 40 people died including these soldiers.,1.1 Introduction,Mechanics and wire walking,Stable Equilibrium(,稳定平衡,),Mass center(,质心,),1.1 Introduction,Mechanics and airplane.,1.1 Introduction,Mechanics and hydro project,Three Georges Project,1.1 Introduction,Mechanics and Machine Design,Dose the shoe smell ok?,1.1 Introduction,1.1 Introduction,1. About Static.,Static is the branch of mechanics which studies the laws of equilibrium of bodies under the action of force systems.,It mainly studies simplifications and equilibrium conditions of force systems and applications of the corresponding results.,2. About Strength/Mechanics of materials.,3. About the study of this course.,1.1 Introduction,1. About static.,2. About Strength/Mechanics of materials.,Under the request that the strength, rigidity, stability are satisfied, offer the necessary theoretical foundation and calculation method for determining reasonable shapes and dimensions, choosing proper materials for the components at the most economic price.,3. About the study of this course.,1.2-1.4 Units ant Conversion of it,Length,1 in.=25.40mm,1 in.=0.02540m,1 ft.=0.3048m,Force,1 lb=4.448N,1 kip=4.448kN,1mm=0.03937 in.,1m=39.37 in.,1m=3.281 ft,1N=0.2248 lb,1kN=0.2248kip,1.5 -1.8 Trigonometric Formulas and Linear Equations.,Study by yourself !,Discussion,Tell me some example of using,statics and strength of materials in you life.,Thank you!,