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机械设计英文文献及中文翻译

时间:2017-11-06 21:26来源:毕业论文
The design of mechanical parts with many constraints, design criteria design should meet the constraint condition. 1, technical performance standards technical performance includes the function of products, manufacturing and operation status
The design of mechanical parts with many constraints, design criteria design should meet the constraint condition. 1, technical performance standards technical performance includes the function of products, manufacturing and operation status of all property, refers to the static performance, dynamic performance is also used to refer to. For example, the product can transfer power, efficiency, service life, strength, stiffness, friction resistance, wear resistance, thermal stability, vibration characteristics. Technical performance criterion refers to the relevant technical performance to meet the stipulated requirements. For example, the vibration will generate additional dynamic load and stress, especially when the frequency is close to the mechanical systems or parts of the natural frequency, resonance phenomenon will occur, then the amplitude will increase sharply, may lead to the parts and even whole system rapidly damage. Vibration stability criterion is limiting the mechanical systems or parts of the vibration parameters, such as frequency, amplitude, noise in the provisions of the scope of the permit. And as the machine when the fever may cause thermal stress, thermal strain, even will cause thermal damage. Thermal characteristics of guidelines is to restrict the various related thermal parameters ( such as the thermal stress, thermal strain, temperature rise ) in the specified range. 2, standardization and design of mechanical products related to the main standard generally are: the concept of Standardization: involved in the design process of the terminology, symbols, units of measurement shall be in accordance with the standard; objective form standardization: parts, raw materials, equipment and energy structure, size, performance, should be uniform choice. Methods: standardized operation method, measurement method, test method etc should be according to the relevant provisions. Standardization in the entire design process all behavior, must meet the requirements for standardization. Has been released and the design of mechanical parts related standard, from the scope of application of speaking, can be pided into national standards, industry standards and enterprise standards for three grade. From the use of mandatory, can be pided into must be performed and recommended the use of the two kind. 3: reliability, reliability standards for products or components within the prescribed conditions, the expected life to finish regulation function of theprobability of Reliability criterion refers to design products, components or parts should be able to meet the requirements of the reliability requirements in 4, the safety criterion for safety of machinery parts including: Security: defined in terms of external load and within a specified period of time, such as fracture parts not excessive deformation, excessive wear and without loss of stability and so on. Machine safety: a machine to ensure that the required conditions of trouble, can normally achieve functional requirements. Work safety: refers to the operation personnel protection guarantee the safety of humanand health of body and mind. Environmental security: refers to the machines to the surrounding environment and people do not cause the pollution and harm14931

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Design methodology to design thinking to rational process, so that the design can follow certain logic, so that more designers can make good design. It generally includes the following content: 1, will design the stage finely, so that each stage is rule-based and reasonable thinking activity. In 2,will be successful or good design store design, establishment of database, for future reference in the design or use. In3, design work in the introduction of the concept of value engineering and method of design, the contradiction in the function and cost trade-off, to obtain good results. 4, used in the design of tribology, vibration theory, fracture mechanics, finite element method, optimization design, reliability design system engineering ergonomics and other emerging disciplines of knowledge, improve the scientific design, reduce blindness. In 5, will expand the scope of design work, extended forward to the market forecast, extends to after sale service. The application of computer aided design in order to reduce the amount of labor, improve design speed and quality of design. 机械设计英文文献及中文翻译:http://www.lwfree.cn/fanyi/20171106/15662.html
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