Abstract: In allusion to the problem of designing the similitude test model of laminated composite plate, a confirm method of the structure size applicable interval of distortion test model is put forward under the condition to have the same nature characteristics. With the method of combining the dimensional analysis and governing equation analysis, the completely scaling laws and the distortion scaling laws between the model of laminated composite plate and its prototype are established, three scaling laws of the prototype are yielded. Then a laminated composite plate which is in common use is taken as an example, under the study of the structure size applicable interval which kept the same first-order nature characteristic (nature frequency and vibration mode), comparing with finite element analysis and resolving analysis to obtain the structure size applicable interval of distortion test model when the model and the prototype is in different orders with the same nature characteristics. Test results reveal that this work lays a theoretical foundation for the similar model structural design for such laminated composite plate.

Key words: laminated composite plate;vibration characteristic;distortion test model;structure size applicable interval