V 1/ la cac ma Iran dudne eheo
CHl/ONG 3 CAC PHlTONG TRINH CO BAN CUA HIEN Tl/ONG FLUTTER
3.5. Ket luan cudi chucmg
Trong chuang nay da nghien cuu each thue xay dung cae phuang trinh vi phan ehuyén dgng c6 dien ciia hien lugng Flutter cho he cd 2 bae tu do: mgl bae tu do udn va mot bae tu do xodn, đng thdi cung thiet lap phuang trinh vi phan ehuyen dgng ciia he nhieu bae lir dọ
Mgl sd nhan xet riit ra tir ngi dung ciia chuang nay nhu sau:
- Van 66 chfnh trong xay dung phuang trinh co ban la xac dinh cac luc khi dgng Flutter (ve phai ciia phuang trinh ca ban). Tit ban chat ciia hien lugng
mat dn dinh Flutter la hien luang dao đne tu kfeh đne, cac luc khf done xac dinh lii phan ung ciia ket cau trong đng khf. Cd hai md hinh xay dung cac lire khf dgng la md hinh giai ifeh eiia Theodorsen va md hinh ihue nghiem eiia Scanlan. Tuy nhien md hinh Scanlan tiep can long quat cho tat ca cac loai mat cat cau nen duge sir dung rai rgng rai de giai quyei bai loan phan tfch on dgng khf dgng lue eho kei eau ndi chung va eho eau day vang ndi rieMig. Cae luc khf dgng edn phu ihuge vao van toe gid. tan sd dao dgng.
Cac he sd Scanlan /Y *,^' (/ = 1,2,3) trone phuône trinh ca ban cd neudn ede lu thue nehiem tren md hinh vat ly trone ham eid. Tuv nehien vdi mot sd dane mat cat cau dav vane dien hinh cd eae bieu đ duoe xav dune sdn cd
the sir dune duac, ^- .
- Trong mot sd phat trién gan day, cd xet them thanh phan dieh ehu\en eua can iheo phucmg ngang do lire khf dgng ngang nen xuat hien them phuang Irinh ca ban thu ba bieu diin dao dgng tu kfeh theo phuong ngang eiia eong Irinh.
CHl/ONG 4. PHI/ONG PHAP XAC DINH VAN TOC GIO TOI HAN d TRANG THAI XAY RA MAT ON DINH FLL TTER