Optimization of foam filled spot-welded column for the crashworthiness design/Taskiniu budu suvirintu ir putomis uzpildytu saugiu koloneliu projektavimo optimizavimas

To improve crashworthiness efficiency, aluminum foam has been adopted as one of new filler materials in engineering. Introduction of the foam material changes the crash behavior of structural component and make necessary exploration of more sophisticated design optimization methodology. This paper presents a crashworthiness design of foam-filled columns made from mild steels and joined by spot-weld. During the design optimizations, maximum crushing force (Pm) is set as the design objective, wall thickness , foam density and side length (continuous variables) and also the number of spot-weld (discrete variable) are selected as design variables, and specific energy absorption (SEA) is set as the design constraint. To formulate the complex crashworthiness design problem, the response surface method (RSM), is used. Koloneliu saugumui padidinti kaip naujas uzpildas buvo panaudotos aliuminio putos. Del to paksikeite koloneles komponentu suirimo pobudis ir reikejo parinkti sudetingesne projektavimo optimizavimo metodologija. Siame straipsnyje pasiulytas saugiu putomis uzpildomu, is minksto plieno gaminamu ir taskiniu budu suvirinamu koloneliu projektavimo metodas. Optimizuojant maksimali ardomoji jega (Pm) yra panaudota kaip projekto tikslas; sieneles storis, putu tankumas ir krastines ilgis (nepertraukiami kintamieji), taip pat suvirinimo tasku skaicius (diskretinis kintamasis) yra parinkti kaip kintamieji, specifine absorbuota energija yra panaudota kaip tikslo funkcija. Formuluojant kompleksine saugios konstrukcijos projektavimo problema taikytas pavirsiaus reakcijos metodas. [TEXT NOT REPRODUCIBLE IN ASCII.]