Form-finding of shell structures based on isogeometric analysis
Traženje forme ljuski zasnovano na izogeometrijskoj analizi
Апстракт
The paper reviews potentials of the application of isogeometric analysis (IGA) in the processes of form-finding of shell structures. Shaping of those specific spatial structural typologies is determined by consideration of the form-structure interrelation, therefore the sustainable approach to design implies application of form-finding techniques. In this paper, we applied the frequently used form-finding principle a inverted model strategy, more precisely concept of inverted displacements. Contrary to the similar studies which apply standard finite element (FE) discretization, we proposed an application of isogeometric modeling of the structure. Isogeometry implies analysis based on the exact definition of the initial geometry, facilitating design and analysis by application on the single data type - model. Advantage of the conservation of geometric representation is especially evident in the case of shell structure designs, bearing in mind their continuously curved geometry. We ap...plied NURBS based isogeometric analysis in which geometry and displacement field are described by NURBS surfaces. Modeling of the structural performances was conducted by isogeometric shell elements. Presented numerical experiment has a function to confirm the effectiveness of the proposed approach.
Radom se razmatraju potencijali primene izogeometrijske analize u procesima traženja formi ljuski. Oblikovanje ovih specifičnih prostornih strukturalnih tipologija određeno je razmatranjem interrelacije forma-struktura, zbog čega održivi pristup njihovom projektovanju podrazumeva primenu tehnika traženja forme. U okviru ovog rada primenjena je strategija obrnutog modela, često korišćen princip traženja forme, tačnije koncept obrnutih pomeranja. Za razliku od sličnih istraživanja u kojima se koristi standardna diskretizacija konačnim elementima (FE), ovim radom se predlaže izogeometrijsko modelovanje strukture. Izogeometrija podrazumeva analizu zasnovanu na egzaktnoj definiciji početne geometrije, čime je omogućeno projektovanje i analiza upotrebom jedinstvenog tipa podataka - modela. Prednost konzervacije geometrijske reprezentacije posebno dolazi do izražaja u slučaju projektovanja ljuski imajući u vidu njihovu kontinualno zakrivljenu geometriju. Primenjena je NURBS izogeometrijska a...naliza, u kojoj se geometrija i polje pomeranja opisuju korišćenjem NURBS površi. Modelovanje strukturalnih performansi izvršeno je korišćenjem izogeometrijskog elementa ljuske. Prikazan numerički eksperiment u funkciji je potvrđivanja efikasnosti predloženog pristupa.
Кључне речи:
shell structures / shell design / form-finding / isogeometric analysis / NURBS surface / ljuske / projektovanje ljuski / traženje forme / izogeometrijska analiza / NURBS površИзвор:
Izgradnja, 2016, 70, 9-12, 353-360Издавач:
- Udruženje inženjera građevinarstva, geotehnike, arhitekture i urbanista "Izgradnja", Beograd
Финансирање / пројекти:
- Развој и примена научних метода у пројектовању и грађењу високоекономичних конструктивних система применом нових технологија (RS-MESTD-Technological Development (TD or TR)-36008)
Институција/група
Arhitektonski fakultetTY - JOUR AU - Milošević, Jelena AU - Kovačević, Saša AU - Nestorović, Miodrag PY - 2016 UR - https://raf.arh.bg.ac.rs/handle/123456789/226 AB - The paper reviews potentials of the application of isogeometric analysis (IGA) in the processes of form-finding of shell structures. Shaping of those specific spatial structural typologies is determined by consideration of the form-structure interrelation, therefore the sustainable approach to design implies application of form-finding techniques. In this paper, we applied the frequently used form-finding principle a inverted model strategy, more precisely concept of inverted displacements. Contrary to the similar studies which apply standard finite element (FE) discretization, we proposed an application of isogeometric modeling of the structure. Isogeometry implies analysis based on the exact definition of the initial geometry, facilitating design and analysis by application on the single data type - model. Advantage of the conservation of geometric representation is especially evident in the case of shell structure designs, bearing in mind their continuously curved geometry. We applied NURBS based isogeometric analysis in which geometry and displacement field are described by NURBS surfaces. Modeling of the structural performances was conducted by isogeometric shell elements. Presented numerical experiment has a function to confirm the effectiveness of the proposed approach. AB - Radom se razmatraju potencijali primene izogeometrijske analize u procesima traženja formi ljuski. Oblikovanje ovih specifičnih prostornih strukturalnih tipologija određeno je razmatranjem interrelacije forma-struktura, zbog čega održivi pristup njihovom projektovanju podrazumeva primenu tehnika traženja forme. U okviru ovog rada primenjena je strategija obrnutog modela, često korišćen princip traženja forme, tačnije koncept obrnutih pomeranja. Za razliku od sličnih istraživanja u kojima se koristi standardna diskretizacija konačnim elementima (FE), ovim radom se predlaže izogeometrijsko modelovanje strukture. Izogeometrija podrazumeva analizu zasnovanu na egzaktnoj definiciji početne geometrije, čime je omogućeno projektovanje i analiza upotrebom jedinstvenog tipa podataka - modela. Prednost konzervacije geometrijske reprezentacije posebno dolazi do izražaja u slučaju projektovanja ljuski imajući u vidu njihovu kontinualno zakrivljenu geometriju. Primenjena je NURBS izogeometrijska analiza, u kojoj se geometrija i polje pomeranja opisuju korišćenjem NURBS površi. Modelovanje strukturalnih performansi izvršeno je korišćenjem izogeometrijskog elementa ljuske. Prikazan numerički eksperiment u funkciji je potvrđivanja efikasnosti predloženog pristupa. PB - Udruženje inženjera građevinarstva, geotehnike, arhitekture i urbanista "Izgradnja", Beograd T2 - Izgradnja T1 - Form-finding of shell structures based on isogeometric analysis T1 - Traženje forme ljuski zasnovano na izogeometrijskoj analizi VL - 70 IS - 9-12 SP - 353 EP - 360 UR - https://hdl.handle.net/21.15107/rcub_raf_226 ER -
@article{ author = "Milošević, Jelena and Kovačević, Saša and Nestorović, Miodrag", year = "2016", abstract = "The paper reviews potentials of the application of isogeometric analysis (IGA) in the processes of form-finding of shell structures. Shaping of those specific spatial structural typologies is determined by consideration of the form-structure interrelation, therefore the sustainable approach to design implies application of form-finding techniques. In this paper, we applied the frequently used form-finding principle a inverted model strategy, more precisely concept of inverted displacements. Contrary to the similar studies which apply standard finite element (FE) discretization, we proposed an application of isogeometric modeling of the structure. Isogeometry implies analysis based on the exact definition of the initial geometry, facilitating design and analysis by application on the single data type - model. Advantage of the conservation of geometric representation is especially evident in the case of shell structure designs, bearing in mind their continuously curved geometry. We applied NURBS based isogeometric analysis in which geometry and displacement field are described by NURBS surfaces. Modeling of the structural performances was conducted by isogeometric shell elements. Presented numerical experiment has a function to confirm the effectiveness of the proposed approach., Radom se razmatraju potencijali primene izogeometrijske analize u procesima traženja formi ljuski. Oblikovanje ovih specifičnih prostornih strukturalnih tipologija određeno je razmatranjem interrelacije forma-struktura, zbog čega održivi pristup njihovom projektovanju podrazumeva primenu tehnika traženja forme. U okviru ovog rada primenjena je strategija obrnutog modela, često korišćen princip traženja forme, tačnije koncept obrnutih pomeranja. Za razliku od sličnih istraživanja u kojima se koristi standardna diskretizacija konačnim elementima (FE), ovim radom se predlaže izogeometrijsko modelovanje strukture. Izogeometrija podrazumeva analizu zasnovanu na egzaktnoj definiciji početne geometrije, čime je omogućeno projektovanje i analiza upotrebom jedinstvenog tipa podataka - modela. Prednost konzervacije geometrijske reprezentacije posebno dolazi do izražaja u slučaju projektovanja ljuski imajući u vidu njihovu kontinualno zakrivljenu geometriju. Primenjena je NURBS izogeometrijska analiza, u kojoj se geometrija i polje pomeranja opisuju korišćenjem NURBS površi. Modelovanje strukturalnih performansi izvršeno je korišćenjem izogeometrijskog elementa ljuske. Prikazan numerički eksperiment u funkciji je potvrđivanja efikasnosti predloženog pristupa.", publisher = "Udruženje inženjera građevinarstva, geotehnike, arhitekture i urbanista "Izgradnja", Beograd", journal = "Izgradnja", title = "Form-finding of shell structures based on isogeometric analysis, Traženje forme ljuski zasnovano na izogeometrijskoj analizi", volume = "70", number = "9-12", pages = "353-360", url = "https://hdl.handle.net/21.15107/rcub_raf_226" }
Milošević, J., Kovačević, S.,& Nestorović, M.. (2016). Form-finding of shell structures based on isogeometric analysis. in Izgradnja Udruženje inženjera građevinarstva, geotehnike, arhitekture i urbanista "Izgradnja", Beograd., 70(9-12), 353-360. https://hdl.handle.net/21.15107/rcub_raf_226
Milošević J, Kovačević S, Nestorović M. Form-finding of shell structures based on isogeometric analysis. in Izgradnja. 2016;70(9-12):353-360. https://hdl.handle.net/21.15107/rcub_raf_226 .
Milošević, Jelena, Kovačević, Saša, Nestorović, Miodrag, "Form-finding of shell structures based on isogeometric analysis" in Izgradnja, 70, no. 9-12 (2016):353-360, https://hdl.handle.net/21.15107/rcub_raf_226 .