Schwedler Type Spherical Reticulated Shell Finite Element Analysis And Optimization Of Design,

Reticulated Shell structure, has inherent properties of the pole structure and thin shell structure, be subjected to dint reasonable, over lay to across one degree big, is kind to be subjected to concern rather at home and abroad, has vast application foreground of space structure.Along with the extensively applying of Reticulated Shell structure, the optimization design is extremely paid attention to doubly. In the light of the present documents has imperfections about the fact that the optimization design variable has been only limited to the sections, or carrying on separate optimization design in which carrying on optimization of the size of net first and then optimized the sections, these optimization methods have not reached the best optimization result. In the text , taking Schwedler Reticulated Shell as an example, I propose comprehensive optimization design method that is shape optimization .design variable including the shelly radius,net size (the shelly nodes number and the layers number),the diameter and thickness of steel tube, the result of optimization indicate that the cost reduce 19.1 percent, The result is remarkable. Besides satisfy the desire of the stress constraints and deformation, we also consider that Reticulated Shell is a kind of structure is sensitive to deficiency, load under the heavy snow, high wind and earthquake, the structure may lose stably, so we will carry on the stability analysis to the structure and get the result to Satisfy the stability request.Many engineerings will be inevitably aroused by gale defying, earthquake, explosion and vibrate or impact interference effect from other external environments, dynamical damage or destruction will be the Main expiration form, in the text, taking Schwedler Reticulated Shell as an example, carrying on dynamical optimization design in which design variable including the frequency and transform, has obtained the ideal effect.