This paper explains fuzzy factor decision and evaluation method in mechanical de-sign by fuzzy correlation theory and principle of fuzzy closeness degree, also with two examples of using tooth number fuzzy selection in gear drive design and fuzzy synthesis appraisal in design scheme of gear reductor.
Fuzzy robust design is a kind of design, which made a comprehensive consideration on various random disturbing factors and fuzzy factors that existed objectively in the course of product design, manufacturing and application, and it studied the law of the uncertainty on product quality caused by these factors, thus makes the product design reached to a modern designing method of good quality with lower prices.
The investment decisive-making for oil engineering is a very complicated process, and it comes down to many fuzzy factors. Compared with the traditional investment techniques, the technique of fuzzy optimization can more effectively quantify various kinds of fuzzy factors that influence analysis and decision-making. The analytic results can be more faithful to reality and enhance scientific and accurate decision-making.
The investment decisive-making for Harbor engineering is a very complicated process, and it comes down to many fuzzy factors. Compared with the traditional investment techniques, the technique of fuzzy optimization can more effectively quantify various kinds of fuzzy factors that influence analysis and decision-making. The analytic results can be more faithful to reality and enhance scientific and accuratedecision-making.
This paper emphasizes on analyzing the fuzzy factors that affect machinery's or structure' s reliability of fatigue: subject uncertainty in reliability analysis of fatigue, the fuzziness of loading, the fuzziness of parameters in some fatigue fracture and the fuzziness in failure criterion, then points out the necessity of developing fuzzy reliability theory.
In view of short of data in reliablity design of fatigue strength of parts, this paper discusses the method which describles fatigue strength in fuzzy number by use of design data at hand, and by judging, synthesizing fuzzy factors which affect fatigue strength according to the experience of designers.
In the optimal level cut method for solving the fuzzy optimal problems,the determination of optimal level value λ is the key of the entire problem. After synthesized the advantages of fuzzy and grey judgements and comprehensively considered the grey and fuzzy factors which affect the value adoption of λ ,this paper put forward a judging method for the grey fuzzy comprehension of optimal level value based on the analysis of hierarchy and then proceed to solve the fuzzy optimal problems more statisfactorily.
This paper carries out a systematic research on the adaptabili- ty levels of harbour-ship system by means of computer similation combined with fuzzy set theory, analysing quantitatively the random anti fuzzy factors which exist in the system in large numbers.
Based on the analysis of fuzzy factors in tolerance design and the limitations of the traditional Taguchi squared quality loss function, a fuzzy quality loss function model utilizing fuzzy theory was introduced.
In order to use fuzzy factors with the multi-criteria evaluation, these factors will be standardized to a byte-level range of 0 255.
Dynamic characteristic analysis of fuzzy-stochastic truss structures based on fuzzy factor method and random factor method
A new fuzzy stochastic finite element method based on the fuzzy factor method and random factor method is given and the analysis of structural dynamic characteristic for fuzzy stochastic truss structures is presented.
Geographical information systems have been used for data acquisition and processing, coupled with a multicriteria evaluation technique enhanced with fuzzy factor standardization.
The analytical hierarchy process (AHP) is the multicriteria evaluation technique used, enhanced with fuzzy factor standardization.
A novel method (Fuzzy factor method) is presented, which is used in the dynamic response analysis of fuzzy stochastic truss structures under fuzzy stochastic step loads.
In this paper the authours described how to solve the problems of evaluating fuzzy elements and indicatrixes without the same unit under selecting the project in water conservaney and hydroelectrie power engi neering by combining Dolphi Method with Fuzzy oomprehensive evaluation listed all the formu as afforded the useful tables and given electronic computer programme.
In this paper a fuzzy asserting criteria method for preferred rankand choice of design schemes is improved.The improved method can sol-ve problem of selection and assessment of design parameters and can berun in computeres.The authors study analytical method for fuzzy fac-tors and fuzzy subjective information,such as design experience,view-point and principle,and discuss at length concept and methods for treat-ing above problems by way of practical engineering examples.
According to the Fuzzy mathematical principle, some Fuzzy factors are disposed of in the optimization desigh of suspended pipeline overhead-crossing, in whose calculation the pipe rigidity is concerned. The results obtained are more reasonable and satisfactory.