Study On Drape Performance Of Fabrics And Establishing Of Evaluation System

The article gives theory describing and method of computer implementation about each evaluation index of fabric draping behavior. Through analyzing evaluation indexes by using statistical theory combined with actual need of fabric drape evaluation, the author thinks applying drape coefficient to evaluate drape degree, the whole unevenness ratio to evaluate drape appearance state, drape index to evaluate the integration of fabric drape, with secondary indexes, such as drape state ratio, wave trough scatter coefficient, wave crest distribution angle scatter coefficient, wave width scatter coefficient is available. Meanwhile, based on five indexes above, the conclusions are proved through clustering analysis in the Matlab.The article gives simple description of differences between drape beauty and drape shape statue. Fabric drape has features of variation and consistence, and its variation is due to the change of drape crest number, which is close to normal distribution, according to this, the definition of optimal crest number is brought up.Through statistical analysis about evaluation indexes, the author thinks the discussion about drape shape statue should be limited from 15 to 50 percent of drape coefficient. Meanwhile, under the confidence of 95 percent, the certain relations between evaluation indexes and drape coefficient are found, and these indexes includes average crest radius, average trough radius, maximum crest radius, maximum trough radius, minimum crest radius, minimum trough radius, average wave width, and maximum wave width. Relations between other indexes and drape coefficient are different, for example, drape shape ratio decreases firstly and then increases followed by increase of drape coefficient, and crest number, CV of crest radius and CV of wave width generally decreases followed by drape coefficient, and CV of trough radius, CV of crest distribution angle and minimum wave width increases followed by drape coefficient.Sensory impressions evaluation indexes forms to eyes are different, and are showed in the accordingly figures.Because of variation of fabric drape, and how to form fabric static drape, the author thinks static drape should include ds1 static drape and ds2 static drape, the differences between ds1 static drape and ds2 static drape, and among ds2 static drapes are found. The ds1 static drape is available.