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The structural design of the project is a multi- level, multi- target system engineering , the coexistence of a large number of measured quantitative data and unpredictable qualitative data , the selection of their programs are often intricate solutions . Existing structural design specification requires a \Only in respect of the most simple design of structural members ( such as beams) , available in a variety of materials , space , money, time and other conditions , and to meet the provisions of the relevant specifications ( strength , stiffness , stability , etc. ) several designs to choose from, and each program can achieve the purpose and characteristics of different materials used for most provinces , if any, programs , and some construction convenience or the shortest period , designers to find a comprehensive benefits programs tend to experience and feel alone , inevitably brought deviation or error . A component like this , the selection of an engineering design program is much more abstract , difficult to imagine. In the various disciplines of knowledge and the rapid development of computer widely used today , in the past the kind of racking our brains seat of your pants approach is not suitable for engineering structural design decisions. The thesis is the study of the structural design of process systems , drawing on the knowledge of other disciplines , the quantification of the qualitative and quantitative data , a variety of mathematical model and applicable in the structural design of program evaluation and decision-making and practicality of the in-depth study , a comprehensive program evaluation system . Multi-objective evaluation and decision - making system , the establishment of the design of engineering structures , can improve the engineering staff , including owners ' awareness of the importance of design preferred ; the objective detailed model and data , to overcome the previous practice experience and subjective factors alone evaluation caused by distortion , more scientific , impartial ; digitized model , easy to design the master operation , engineering design has the best efficiency , best quality ; digitized model is conducive to the inheritance and accumulation of knowledge and experience , hope overall quality of some help to improve designers and designers .
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