机械原理英语版

机械原理英文词汇Chapter 1 Introduction第一章绪论1.mechanism 机构2.kinematical element 运动学元件3.link 构件4.cam 凸轮5.gear 齿轮6.belt 带7.chain 链8.internal-combustion engine 内燃机9.slider-crank mechanism 曲柄滑块机构10.piston 活塞11.connecting rod 连杆12.crankshaft 曲轴13.frame 机架14.pinion 小齿轮15.cam mechanism 凸轮机构16.linkage 连杆机构17.synthesis 综合Chapter 2 Structure analysis of mechanisms 第二章机构的结构分析1. structural analysis 结构分析2. planar mechanisms 平面机构3. planar kinematical pairs 平面运动副4. mobile connection 可动连接5. transmit 传输6. transform 转换7. pair element 运动副元素8. higher pair 高副9. revolute pair 转动副10. sliding pair ,prismatic pair 移动副11. gear pair 齿轮副12. cam pair 凸轮副13. screw pair 螺旋副14. spherical pair 球面副15. surface contact 面接触16. kinematical chain 运动链17. closed chain 闭式链18. open chain 开式链19. driving links 驱动件20. driven links 从动件21. planar mechanism. 平面机构22. spatial mechanism 空间机构23. The kinematical diagram of a mechanism机构运动简图24. schematic diagram 草图25. kinematical dimensions 运动学尺寸26. fixed pivot 固定铰链27. pathway 导路28. guide bar 导杆29. profiles 轮廓30. the actual cam contour 凸轮实际廓线.31. polygon 多边形32. route of transmission 传递路线33. structural block diagram 结构框图34. Degree of Freedom (DOF) 自由度35. constraints 约束36. common normal 公法线37. compound hinge 复合铰链38. gear-linkage mechanism 齿轮连杆机构40. passive DOF 局部自由度41. redundant constraint 虚约束42. The composition principle and structural analysis组成原理与结构分析43. the basic mechanism 基本机构44. Assur groups 阿苏尔杆组45. inner pair 内副46. outer pairs 外副.47. composition principle of mechanism 机构组成原理48. kinematical determination 运动确定性Chapter 9 Balancing of Machinery第九章机械的平衡1. Vibration 振动2. Frequency 频率3. Resonant 共振4. Amplitudes 振幅5. Balancing of rotors 转子6. Rigid rotors 刚性转子7. Flexible rotors 柔性转子8. Balancing of mechanisms 机构的平衡9. Disk-like rotor 盘状转子10.Non-disk rigid rotor 非盘状转子11.the shaking force 振动力12.the shaking moment 振动力矩13.Balancing of Disk-like Rotors 盘状转子的平衡14.static imbalance 静不平衡15.static balancing machine 静平衡机16.the mass-radius product 质径积17.dynamically unbalanced 动不平衡18.balance planes 平衡基面19.Dynamic balancing machine 动平衡机20.Unbalancing Allowance 许用不平衡量Chapter 8 Motion of Mechanical Systemsand Its Regulation第八章机械系统的运转及其调节1. Periodic speed fluctuation 周期性波动2. punching machine 冲床3. Motion Equation of a Mechanical System机械系统的运动方程4. General Expression of the Equation of Motion运动方程的一般表达式5. the kinetic energy 动能6. the moment of inertia 转动惯量7. Dynamically Equivalent Model of a Mechanical System等效动力学模型8. the equivalent moment of inertia 等效转动惯量9. the equivalent moment of force 等效力矩10.the equivalent link 等效构件11.Pump 泵12.Blower 鼓风机13.Flywheel 飞轮1)Calculate the degree of freedom (DOF) of the mechanisms. shown in the following figure.2) judge and point out the compound hinge, passive DOF or redundant constraints.3)Judge whether the mechanism has determined motion?2.Carry out the structural analysis for the mechanism in followingfigure.(1)List the assembly order of Assur groups,(2) Judge the grade of the mechanism.1. There are four imbalances in a disk-like rotor. The masses, rotating radii and angular orientations are: m1=10kg, m2=8kg,m3=7kg and m4=5kg, r1=100mm, r2=150mm, r3=200mm andr4=100mm. The rotor is to be balanced by removing a mass mb at a rotating radius of rb=100mm. Find the magnitude mb and its location angle b.(15points)。

十四、Mechanical principlesDegrees of freedomIn mechanics, degrees of freedom are the set of independent displacements and/or rotations that specify completely the displaced or deformed position and orientation of the body or system.FormulaPl——lower pair , surface contactPh——higher pair , point or line contactn——activity component3——every component have 3 degrees of freedom 2——lower pair have 2 degrees of freedom1——high pair have 1 degrees of freedomF>1 , we can not know what happen next timeF=1 , we can know what happen next timeF=0 , mechanics will not move三审，笔试，有三个图，分别计算哪个结构是稳定的，第一个是稳定的，第二个是稳定但是有过度约束，第三个不稳定可运动。

在过度约束中，审核官问我知道不知道一个公式s=2k-3,我不明白，回来和同学讨论觉得这个应该是计算虚约束的公式，请多注意。

Plane mechanism`s motion analysisInstantaneous center of velocityRevolute pair join, two mechanism , instantaneous center of velocity in center of revolute pair.Rod 1 and rod 2 are combined by revolute pair, P12 is instantaneous center of velocity.Pure-slide pair join, two mechanism , instantaneous center of velocity infinite distance of vertical motion direction.A move along rod B. P12 in infinite distance of vertical rodB .High pair join , two mechanism , they are pure rolling , instantaneous center of velocity in contact point of two mechanism.P12 is instantaneous center of velocityHigher pair join , two mechanism , they are relative slide , instantaneous center of velocity in base tangent.P12 in t-t.Kennedy-Aronhold theoremP13 in P12 and P23 join line. P13 in P14 and P34 join line. P24 in P12 and P14 join line. P24 in P23 and P34 join line.2 and 4 velocity is same in P24Plane four bar mechanismA and D fix called stander , AB CD called side link. Link can rotation called crank--ABLink can shake in range of degree called rocker--CD Crank-rocker mechanismRadarDouble-crank mechanismTrain wheelDouble-rocker mechanismCraneCam mechanismAdvantag e: structure is simple, respond is quickly. Disadvantage: cam produce is difficult, easily wear between cam and follower.GearA gear is a component within a transmission device that transmits rotational force to another gear or device. Spur gearSpur gear are used for low speed applications and those situations where noise control is not a problem.Helical gearHelical gear operate more smoothly than do spur gear. The use of helical gears is indicated when the application involves high speeds , large power transmission or where noise abatement is important,A disadvantage of helical gear is a resultant thrust along the axis of the gear , which needs to be accommodated by appropriate thrust bearing , and a greater degree of sliding friction between the meshing teeth , often addressed with specific additives in the lubricant. Double helical gearsDouble helical gears , also know as herringbone gears , overcome the problem of axis thrust presented by single helical gears by having teeth that set in a "V" shape. Bevel gearThe angle between the shafts can be anything except 0 and 180 degree.Worm gearThe prime feature of a worm-and-gear set is that it allows the attainment of a high gear ratio with few parts in a small space.Rack and pinionTorque cam be converted to linear force by meshing a rack with a pinion : the pinion turns the rack moves in a straight line.Planet gear。

机械原理英语Mechanical Principles in English。

Mechanical principles are the foundation of engineering and technology. Understanding these principles is crucial for anyone working in the field of mechanical engineering. In this document, we will discuss some of the key mechanical principles in English.First and foremost, it is important to understand the concept of force. Force is a vector quantity that can cause an object to accelerate, decelerate, or change direction. It is measured in units of newtons and is represented by the symbol F. The magnitude and direction of a force are essential in determining its effect on an object.Next, let's consider the concept of work and energy. Work is done when a force acts on an object to move it a certain distance. The amount of work done is equal to the force applied multiplied by the distance moved in the direction of the force. Energy, on the other hand, is the ability to do work. There are different forms of energy, including kinetic energy (energy of motion) and potential energy (energy of position).Another important mechanical principle is the study of simple machines. Simple machines are basic mechanical devices that apply a force to accomplish work. The six types of simple machines are the lever, wheel and axle, pulley, inclined plane, wedge, and screw. These simple machines can be combined to create more complex machines that make work easier.Furthermore, it is crucial to understand the concept of mechanical advantage. Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device, or machine system. It is calculated by dividing the output force by the input force. Understanding mechanical advantage is essential for designing and optimizing mechanical systems.Additionally, the study of motion and its principles is fundamental in mechanical engineering. Motion is described in terms of displacement, velocity, and acceleration.The laws of motion, formulated by Sir Isaac Newton, are the foundation of classical mechanics. These laws describe the relationship between the motion of an object and the forces acting on it.Moreover, the study of fluid mechanics is essential in understanding the behavior of fluids (liquids and gases) and their interactions with solid objects. Fluid mechanics plays a crucial role in various engineering applications, including the design of pumps, turbines, and hydraulic systems.In conclusion, the study of mechanical principles in English is essential for anyone working in the field of mechanical engineering. Understanding concepts such as force, work and energy, simple machines, mechanical advantage, motion, and fluid mechanicsis crucial for designing and optimizing mechanical systems. By mastering these principles, engineers can develop innovative solutions to complex engineering problems and contribute to the advancement of technology and society.。

机械原理英语版范文Mechanical PrinciplesIntroductionMechanical principles are the fundamental concepts and laws that govern the behavior and functions of machines and mechanical systems. These principles form the basis of mechanical engineering, providing engineers with the tools and knowledge necessary to design, analyze, and optimize mechanical systems. Understanding mechanical principles is essential for anyone working in the field of mechanical engineering.Newton's Laws of MotionOne of the most fundamental mechanical principles isNewton's laws of motion. These three laws describe the relationship between the motion of objects and the forces acting upon them. The first law states that an object at rest will remain at rest, and an object in motion will continue moving in a straight line at a constant velocity, unless acted upon by an external force. The second law states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. The third law states that for every action, there is an equal and opposite reaction.Mechanical AdvantageFrictionFriction is another important mechanical principle. It is the force that opposes the relative motion of two surfaces in contact with each other. Friction can be both beneficial and detrimental. On one hand, it allows us to walk, drive vehicles, and hold objects without slipping. On the other hand, it causes a loss of energy and wear and tear in mechanical systems. Engineers must take friction into account when designing machines to ensure they function efficiently and reliably.TorqueStress and StrainConclusionThese are just a few of the many mechanical principles that form the foundation of mechanical engineering. By understanding these principles, engineers can design efficient and reliable machines that meet the needs of society. Mechanical engineering continues to advance, with new technologies and principles being discovered and applied every day. The principles discussed here provide a solid starting point for aspiring mechanical engineers to build upon as they delve deeper into the field.。

机械原理英文经典书籍One classic book on mechanical principles is "Mechanics of Materials" by Ferdinand Beer, E. Russell Johnston, Jr., John DeWolf, and David Mazurek. This book covers the fundamental principles of mechanics, including stress, strain, and deformation of solid materials. It also delves into topics such as axial loading, torsion, bending, and transverse shear. The clear and comprehensive explanations make it a widely used textbook for engineering students and professionals alike.Another widely acclaimed book is "Engineering Mechanics: Dynamics" by J.L. Meriam and L.G. Kraige. This book provides a thorough understanding of the principles of dynamics, including kinematics, kinetics, and energy methods. It covers topics such as particle dynamics, planar kinetics of rigid bodies, and three-dimensional dynamics of rigid bodies. The book also includes numerous real-world examples and applications to help readers grasp the concepts more effectively.In addition, "Machinery's Handbook" by Erik Oberg, Franklin D. Jones, Henry H. Ryffel, and Christopher J.McCauley is a classic reference for mechanical design and engineering. This handbook contains a wealth of information on mechanical principles, formulas, tables, and standards. It covers a wide range of topics, including mathematics, mechanics and strength of materials, properties and treatment of materials, and much more. It is an indispensable tool for mechanical engineers and machinists.Other notable books on mechanical principles include "Theory of Machines and Mechanisms" by John J. Uicker, Gordon R. Pennock, and Joseph E. Shigley, and "Fundamentals of Machine Component Design" by Robert C. Juvinall and Kurt M. Marshek. These books provide in-depth coverage of the principles and applications of machine design, including mechanisms, mechanical systems, and machine components.以上是一些经典的机械原理书籍，它们涵盖了力学、机械设计和材料力学等领域的基本原理和实际应用。

机械原理英文Mechanical Principles。

Mechanical principles are the foundation of many engineering disciplines and are essential for understanding how machines and structures work. These principles are based on the laws of physics and are used to design and analyze mechanical systems. In this document, we will explore the basic principles of mechanics and their applications in engineering.One of the fundamental principles of mechanics is Newton's laws of motion. These laws describe the relationship between the motion of an object and the forces acting on it. The first law states that an object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by an external force. The second law relates the force acting on an object to its mass and acceleration, while the third law states that for every action, there is an equal and opposite reaction.Another important concept in mechanical principles is the study of statics and dynamics. Statics deals with the equilibrium of stationary objects and the forces acting on them, while dynamics focuses on the motion of objects and the forces causing the motion. These principles are crucial for designing stable structures and analyzing the performance of moving components in machines.Mechanical principles also encompass the study of materials and their properties. Understanding the behavior of materials under different conditions is essential for designing reliable and efficient mechanical systems. For example, the strength, stiffness, and ductility of materials determine their suitability for specific applications, and engineers must consider these factors when selecting materials for a design.In addition to the fundamental principles of mechanics, there are various mechanical devices and systems that rely on these principles for their operation. For example, gears, levers, pulleys, and hydraulic systems are all based on mechanical principles and are used in a wide range of applications, from simple machines to complex industrial equipment.The application of mechanical principles is not limited to traditional mechanical engineering disciplines. It also plays a crucial role in fields such as aerospace engineering, automotive engineering, civil engineering, and biomechanics. In aerospace engineering, for instance, the principles of mechanics are used to design aircraft and spacecraft that can withstand the forces of flight and space travel. In automotive engineering, these principles are employed to optimize the performance and safety of vehicles. In civil engineering, they are used to design structures that can withstand various loads and environmental conditions. In biomechanics, mechanical principles are applied to understand the mechanics of the human body and develop medical devices and treatments.In conclusion, mechanical principles are essential for understanding the behavior of machines and structures and are the basis for many engineering disciplines. By studying these principles and their applications, engineers can design innovative and efficient mechanical systems that meet the needs of modern society. Whether it's designing a new machine, developing a new material, or improving an existing system, a solid understanding of mechanical principles is crucial for success in the field of engineering.。