Reliability Study And Application On Complicated Mechanical System

Along with the increasingly vigorous competition of the global market, from man-made satellite to the airplane, from car to the bicycle, from instrument equipments to the home appliances, the quantity of all products is becoming increasingly important, immediately the reliability of product is required more and more highly.This paper primarily studies the reliability theories for the mechanical system. The reliability engineering technique of the mechanical system originate the electronics field, now some already issued methods or standards of the design, experiment and analyze for the reliability, mostly set down according to the characteristics that most electronics product failures are of random and the life span obey exponential distribution. Current methods or standards are unsuitable to mechanical product, because the most failures of parts in the mechanical product are wastage; the breakdown of parts is closely related to link, maintain and the way to use; moreover, the parts generally are designed for particular use and not easy to collect the pooling data. This paper is based on the prophase studying and studies the reliability of the mechanical system. The mainly contents and creative ideas in this paper are as follows:1, On the foundation of checking a large quantity of reference data inIIIthe domestic and international, studies and analyzes the present condition proceeds about the system reliability theories, points out the special and the difficult points of the mechanical system reliability study.2, States the complicated relativity in the mechanical system, then bases on the model of stress - strength interference, present that the relativity of between the stress and the strength of the parts is weak and the differences of the relativities of parts and the failure modes of part, and how to compute the related coefficient of parts and the related coefficient of the failure modes of part.3, It is the first time to put forward the new reliability design theory of mechanical series system, the value from the new theory is almost in the 0. Ditlevsen theories boundary; at the same time it simplifies the reliability calculation about the complicated mechanical system, solve the academic difficulties about multi-calculus compute and related coefficient calculation.4, The paper calculates and analyzes the reliability of the example of mechanical system- the reducer system and the main drive subsystem of YP1A1H press by make use of the new theories.Because the reliability theories realms of the mechanical system involve a lot of contents and are so difficult, some problems should be studied further in the future.The subject is supported by Beijing education and scientific research department.