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Northeastern University

工程力学

Northeastern University via XuetangX

Overview

  工程力学是高等院校工科大学生的一门重要的技术基础课。它以工程实际结构中的构件(如杆、轴、梁、柱等)为研究对象,借助于力学分析、力学实验和力学计算来解决其受力与平衡、变形与破坏规律以及工程构件的承载力等实际的力学问题。通过本课程的学习,使得学生能够正确分析工程构件受力,确定其计算简图;熟练掌握工程结构中力系的合成与平衡的求解,正确计算工程构件各种载荷作用下的内力、应力和变形及其相应规律;能够从构件的强度、刚度和稳定性三方面来确定构件的承载能力。
   工程力学课程是一门将力学知识理论与工程实际相结合的课程,课程知识体系既能直接应用于一些工程实际问题,还是机械原理、机械设计、结构力学、弹性力学等后续工科专业课程和从事专业技术工作必需的力学基础。该课程注重培养学生应用基本理论,提高对实际工程问题力学的分析计算能力,培养学生建立工程与力学的基本概念,是基础和专业、理论与实践的桥梁。

    Engineering mechanics is an important technical foundation course for engineering students in higher education institutions. It takes components in actual engineering structures (such as rods, shafts, beams, columns, etc.) as the research object, and solves practical mechanical problems such as stress and balance, deformation and failure laws, and the bearing capacity of engineering components through mechanical analysis, mechanical experiments, and mechanical calculations. Through the study of this course, students can correctly analyze the forces acting on engineering components and determine their calculation diagrams; Proficient in the synthesis and equilibrium solution of force systems in engineering structures, and correctly calculate the internal forces, stresses, and deformations of engineering components under various loads, as well as their corresponding laws; The load-bearing capacity of components can be determined from three aspects: strength, stiffness, and stability.
    The Engineering Mechanics course is a course that combines mechanical knowledge theory with engineering practice. The course knowledge system can be directly applied to some engineering practical problems, and is also a necessary mechanical foundation for subsequent engineering courses such as mechanical principles, mechanical design, structural mechanics, elastic mechanics, and professional technical work. This course focuses on cultivating students' application of basic theories, improving their analytical and computational abilities in practical engineering problem mechanics, and cultivating students to establish basic concepts of engineering and mechanics. It serves as a bridge between foundation and profession, as well as theory and practice.

Syllabus

  • 工程力学绪论(Introduction)
    • 工程力学绪论( Introduction for Engineering Mechanics)
  • 静力学_第一章静力学基本概念(1 Basic concepts of Statics and free-body diagram )
    • 力与刚体(force and rigid body)
    • 静力学公理( Axioms of Statics)
    • 力的投影( Projection of a force)
    • 力矩(Moment of a force)
    • 力偶(Couple)
    • 约束与约束力(Constraints and Reaction Forces)
    • 物体受力分析(Force analysis for objects)
  • 静力学_第二章平面汇交力系(2 System of coplanar concurrent forces)
    • 平面汇交力系的几何法(Geometric method of the coplanar concurrent force system)
    • 平面汇交力系的解析法(Analytical Method in coplanar concurrent force system )
  • 静力学_第三章平面力偶系(3 System of coplanar couple)
    • 平面力偶系的合成(Composition of coplanar couple systems)
    • 平面力偶系的平衡(Equilibrium of a coplanar couple system)
  • 静力学_第四章平面一般力系( 4 General planar force system)
    • 工程中的平面一般力系问题(General coplanar force systems in engineering)
    • 力线平移定理(Theorem of translation of a force )
    • 平面一般力系的简化(Reduction of a general planar force system )
    • 平面一般力系的平衡(Equilibrium of a general coplanar force system)
    • 静定与静不定(Statically determinate and statically indeterminate )
    • 物体系的平衡(Equilibrium of a system of objects)
  • 静力学_第五章摩擦(5 Friction)
    • 工程中的摩擦问题(Frictions in engineering)
    • 滑动摩擦(Sliding friction)
    • 考虑摩擦时物体的平衡问题(Equilibrium of objects with frictions)
    • 摩擦角与自锁(Angle of friction and Self-locking)
  • 静力学_第六章 空间力系(6 Force system in space)
    • 空间力系的合成(Composition of Force System in Space)
    • 空间力系的平衡(Equilibrium of a force system in space)
  • 静力学总结(Summary in Statics)
    • 材料力学_材料力学引言(Foreword in Mechanics of Materials)
      • 材料力学引言(Foreword in Mechanics of Materials)
      • 杆件的变形形式(Deformation forms of the components)
    • 材料力学_第一章轴向拉伸和压缩( 1 Axial tension and compression)
      • 工程中的轴向拉伸和压缩问题(Engineering Cases of Axial tension and compression)
      • 轴向拉伸和压缩的内力(Interal Force of Axial tensio and compression)
      • 轴向拉伸和压缩的应力(Stesses of Axial Tension and Compression)
      • 轴向拉伸和压缩的变形(Deformations of Axial Tension and Compression)
      • 材料拉伸和压缩时的力学性能(Mechanical Properties of Materials in Axial Tension and Compression
      • 轴向拉伸和压缩时的强度(Strength of Memebers in Axial Tension and Compression)
    • 材料力学_第二章剪切( 2 Shear)
      • 工程实际中的剪切问题(Shear problem in engineering practice)
      • 剪切实用计算(Practical calculation of shear)
    • 材料力学_第三章扭转(3 Torsion)
      • 工程实际中的扭转问题(Torsion problem in engineering practice)
      • 扭转时的内力(Internal force of torsion )
      • 薄壁圆筒的扭转(Torsion of thin-walled circular tube)
      • 圆轴扭转时的应力与强度(Stress and Strength of a circular shaft in Torsion )
      • 圆轴扭转时的变形与刚度(Deformation and Stiffness of a circular shafe in Torsion)
    • 材料力学_第四章弯曲内力(4 Internal beding forces)
      • 工程中的弯曲问题(Bending Problems in Engineering)
      • 剪力与弯矩(Shear force and bending moment)
      • 剪力图与弯矩图(Shear force diagram and bending moment diagram)
      • 剪力、弯矩和分布载荷集度的关系(Relationship between shear force, bending moment and distributed load concentration)
    • 材料力学_第五章弯曲应力(5 Bending stress)
      • 梁弯曲的正应力( Normal stress in the bending beam)
      • 惯性矩的计算(Calculation of moment of inertia)
      • 梁弯曲时的正应力强度(Normal Stress Strength of Bending Beams)
      • 提高梁抗弯能力的措施(Measures to Improve the Bending Capacity of Beams)
    • 材料力学_第六章弯曲变形(6 Bending Deformation)
      • 工程实际中的弯曲变形问题(Bending Deformation Problems in Engineering Practice)
      • 梁的挠曲线近似微分方程(Approximately Differential Equation of Deflection Curve in Beams)
      • 用积分法求梁的变形(Integral Method in Deformation of Beams )
      • 用叠加法求梁的变形(Superposition method in Deformation of beam )
      • 梁的刚度校核(Checking in Beam stiffness)
    • 基本变形总结(Summary in Basic Deformations of members)
      • 材料力学_第七章应力状态和强度理论(7 States of Stress and Theories of strength)
        • 应力状态的概念(Concept of Stress State )
        • 平面应力状态(Analytical method of plane stress state )
        • 空间应力状态(State of three dimensional stress)
        • 广义胡克定律(Generalized Hooke's Law)
        • 材料的破坏形式(Failure modes of materials)
        • 强度理论(Strength Theory)
      • 材料力学_第八章组合变形构件的强度(8 Strength of combined deformation members )
        • 组合变形概述(Overview of combined deformation)
        • 弯曲与拉伸组合变形(Combination of bending and tension (or compression)
        • 弯曲与扭转组合变形(Combination of bending and torsion)
      • 材料力学-第九章压杆稳定(9 Stability of columns)
        • 压杆稳定的概念(Concepts in Stability of Columns)
        • 细长压杆的临界力(Critical force of Slender Column)
        • 临界应力图(Diggram of Critical Stress)
        • 压杆的稳定计算(Stability calculation of Column)
        • 提高压杆稳定性的措施(Measures to improve the stability of Column)
      • 期末总结( Termimal Summary)
        • 静力学复习(Summary for Statics)
        • 材料力学复习(Summary in Mechanics of Materials)
        • 典型工程案例详讲(Detailed Description of Typical project Cases)

      Taught by

      Yingmei Li, , , , , , , , , Long Chen, jingtian Kang, , and dazhi Zhang

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