1 M 6 PHONG ANH HirdNG CUA TAI TRONG KHI DQNG DEN TRANG THAI UTVG SUAT - BIEN DANG CANH N A N G TENLCAKH-SSE SIMULATION THE EFFECTS OF AERODYNAMIC FORCE TO STRESS-STRAIN STATES OF LIF
Trang 11 M 6 PHONG ANH HirdNG CUA TAI TRONG KHI DQNG DEN TRANG THAI UTVG SUAT - BIEN DANG CANH N A N G
TENLCAKH-SSE
SIMULATION THE EFFECTS OF AERODYNAMIC FORCE
TO STRESS-STRAIN STATES OF LIFT WING KH-35E MISSILE
Nguyen Thanh Binh', Nguyen Minh TiiW, Phan Tmmg Lai^
'Trung tim Cdng nghp Co khi Chinh xic, Vien Khoa hgc - Cdng ngh$ Quin sg
^Vien Khoa hgc - Cdng nghp Quan sg
T 6 M TAT
Bdi bdo trinh bay ket qud nghien cieu khdo sdt dnh hircmg cila tdi trgng khi dgng den trgng thdi ung sudt vd bien dgng cita ket cdu cdnh ndng ten lira Kh-35E bang phuong phdp mo phong sir dung phdn mem ANSYS Structural Xdy dt/mg bieu do si/rpht^ thugc cita gid tri img sudt cifc dgi vd bien dgng cue dgi theo tdi trgng khi dgng Dua ra ket ludn ve gi&i hgn chiu tdi lan nhat vd de xual gidi phdp tdng khd ndng ldm viec cda ket cdu
Tir khda: Kit cdu cdnh ndng; Trgng thdi img suat - bien dgng; ANSYS structural ^
ABSTRACT
This paper presents the survey results affects of the aerodynamic force to stress-strain slates
of lift wing Kh-35E missile by means of simulations using numerical simulation software ANSYS struchiral Building dependency graph of maximum stress, and deformation under aerodynamicf force Concluded the biggest load limits and propose solutions to improve performance ofihe structure
Keywords: Structural of lift wing, stress-strain states, ANSYS structural
1 DAT VAN BE cue dai (M=0,952) [1,2] Tuy nhien, d giai do?n
niy ten liia chua dugc dieu khidn ndn gii di tii Ten lua Kh-35E cd 4 canh ning bd tii fgng khi dgng tic dgng len cic cinh tuong dli
d?ng X gin cd dinh tien khoang thilt hi K3 nhd (do a = 0» nen chi cd lgc cin) 6 giai doan
Quy dao ten lua Kh-35E cd till chia tiiinh giai bay hinh trtoh, dudi tic dgng cua hp thing dieu doiin phdng vi giai doan bay hinh timh (3 giai khiln lam l$ch cac cinh lai vi lim xuit hipn dojn phdng, ten^lua dugc gia tdc nhd dgng co gdc tin tirong ling Theo dd, gii tii tii tigng
phong nen o cuoi giai do?n phdng dat van tdc khi dgng tic dung len cic cinh cimg ting theo
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Dua tren bang thdng sd quy dao bay [1,2], thdi
diem ten lua bdt ddu chuyen sang bay bang ung
vdi phucmg dn ban vdi gdc hudng bdn 4* = 0"
cd gdc tdn Idn nhdt (a = 3,695°) Lua chpn khdo
sdt cdnh nang ten lua (cu thd la CN3) tai thdi
diem ten lua chuyen sang bay bdng, Id trudng
hop cac cdnh nang chiu tdi Upng khi dong ldn
nhdt trong cdc trudng hgp tinh todn [1]
Hinh I Phoi tri thdn cdnh ten lua Kh-35E
Canh nang ten lira cd ket cau mdng va
dien tich hinh chieu bang ldn Trong qua trinh
bay, cdnh ndng ten lua dugc sir dyng de tao ra
tdi hpng khi dpng gifip ten lua thdng dupc trpng
Iyc ddng thdi dgt dupc dp cao cdn thiet Xet h?
tpa dp khdo sdt tdi trpng khi dpng tdc dung len
CN3 la he tpa dp sau: Gdc tpa dp ddt tai tam
dp (2,39m; 0.28m; 0,29m) cua cdnh nang CN3
Tryc Ox hudng dpc theo tryc dpc ten lua tu mui
din dudi Tryc Oy hudng theo phuong thang
diing ldn Uen Trpc Oz hpp vdi 2 tryc cdn Iai
thdnh he tpa dp de cdc (hinh 2) Khi dd, ta coi
tdi Upng khi dpng tdc dyng len cdnh ndng CN3
tgi thdi diem tdn Itia bat ddu chuyen sang bay
bang Id tdi Upng tgp trung, cd didm dat tai tdm
dp cdnh ndng vd dupc phdn tich thdnh 3 thdnh
phdn theo cdc tryc Ox, Oy, Oz tuong img [1]:
F^ = 11.65 (N); F^ = 996 (N); F^ =-852 (N)
Hinh 2 Hp tpa dp khdo sdt cdnh ndng CN3
Bdi toan khdo sat ten lira Kh-35E img vdi phuong an bdn vdi gdc hudng ban *P = 0° nen ten Kia chi CO ddng Uong mat phdng Ihdng diing, tiic id ten lua chi bay vdi gdc tdn thay ddi Nhdn thdy, gid tri tdi trpng khi dpng theo phuong Ox rat nhd so vdi 2 Mnh phdn cdn lai, va thanh phdn theo phuong Oy vd Oz cd dp ldn tuong duong nhau Dieu nay, dupc Ii gidi la do cdnh nang ten lua dupc bd tri tren than dang X, cdc cdnh hpp vdi mat phdng thdng dung gdc 45" nen khi phan tich tai trpng khi ddng tac dung Ien cdnh thanh cdc Ihdnh phdn theo he tpa dd khdp sat thi Ihdnh phdn flieo phucmg Oy vd Oz cd dp ldn xap xi nhau Gid tri sai khdc Id do tinh bdt ddi xung cua than ten lira (hinh 1) Bdi bdo md phdng xdc dinh trudng phdn bd iing suat - bien dang cdnh nang CN3 iing vdi gid tri tdi trpng khi dpng tren vd khdo sdt dnh hudng cua tdi Upng khi dpng tdc dung len nd vdi gid thilt chilu tdc dung vd (hem dat cua tdi trpng khi dpng khdng thay ddi so vdi trudng hpp tinh
CO sd Chi thay ddi dp Idn ciia tai bang each thay ddi gid tri 2 thanh phdn thep Oy vd Oz Thanh phdn theo Ox gid thiet khdng thay d^i
2 KET CAU CANH NANG
Canh ndng ten liia Kh-35 cd cdu tao gdm, cum gdc canh va cym bdn cdnh lien ket vdi nhau bang chdt ngang Khi ten liia bdo qudn trong dng phdng cdc cdnh nang d trang thdi gap gpn Khi phdng, CO cdu khi nen md chdt ham ldm bung cac canh d vi tri ldm vi6c dang X
Cum gdc cdnh gdm gdc cdnh, chdt, cdc gdn ngang cdc dp che trudc vd sau Gdc cdnh ldm tii hpp kim nhdm dtic nguyen khdi AMg-6
Ben uong gdc cdnh cd co cau md cdnh bdng khi nen khi ten lua ra khdi dng phdng Bien dang cdnh ndng phdn gdc cdnh ldm tir nhdm tdm mdng AMg-6 dupc gan vdi gdc cdnh thdng qua cdc gdn ngang bang cac dinh tan Kdt cdu cum gdc cdnh dang khung xuong vdi vdch mdng dam bdo dp Cling vimg cung nhu tdi uu vd khdi Iupng
(Wnh 3) CF
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Hinh 3 Khung thdn goc cdnh (a) vd vo gdc cdnh (b)
a) ''> , Hmh 4 Khung thdn bdn cdnh (a) vd vo bdn cdnh (b)
Cym ban cdnh gdm gdn chinh, cdc gan
ngang va vd bpc bien dang lien ket vdi nhau
tuong Ur nhu gdc canh (hinh 4) Gan chinh cd
mat cdt ngang dang I de giam khdi lupng Phdn
gdc cua gan chinh cd Id de lien ket vdi gdc cdnh
kieu ban \h bang chdt ngang lam hi thep C45
Mat phdng gdc canh gdn chat vdi than
bang 4 dc vit Thanh phan chiu tai chii ylu cua
canh ndng la gdc canh vd gan chinh Cac gdn
ngang va vd bpc dupc udn tir tdm mdng cd dp
day 1 mm
Thupc tinh vdt lieu hpp kim nhdm AMg-6:
- Khdi lupng rieng: p = 2800(jtg / m^);
- U"ng sudt tdi han bin: CT^ = 320 (A/Pa);
- Cng suat tdi han chay; CT^ = 160(MPa);
- Md dun dan hdi: E = 7,2.10"'(Pa);
-H?sd Poisson: I-= 0,32
3 X A Y DV'NG BAI TOAN M 6 PHONG Bai bdo sir dung gdi phan mem ANSYS Static Structural trong mdi trudng WorkBench
de md phdng khdo sdt dnh hudng cua thanh phan luc phap tuyen den dp ben ket cdu c ^ nang ANSYS sii dung phuong phdp phan tir huu han de giai bdi toan kit cdu thdng qua vi?c rdi rac hda ket cau thanh dang ludi (gdm cdc phan tu vdi cac mit lien ket vdi nhau theo 3 phuang) va gidi he phuong trinh (1) cho cdc phan td ludi dd Phucmg trinh ma Udn chuyen
vi {x} cddang:
[K'^](x}={F} (1) Trong dd:
[K=] - Ma trdn dp cung;
[F] - Tdi trpng tinh tdc dyng;
Ma trdn dp ciing [K=] chiia cdc thdng tin vl kich thudc hinh hpc, thupc tinh vdt Ii?u
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cua phdn tu Vdi moi dang phdn tii khdc nhau,
phu thupc vdo vi Ui vd trang thdi ciia phan tii
ANSYS se ty dpng xdy dyng ma tran dp cumg
tuong ling
Bd qua dnh hudng cua Upng Iuc, tdi
trpng khi dpng coi la tdi Upng tihh
3.1 Giai doan tiln xv ly
- Xay dung md hinh hinh hpc cdnh
nang: Md hinh hinh hpc 3D canh ndng dupc
dung dua Uen ket qud do dac thuc te cdc chi
tilt cdu tao cdnh ndng De gidm thilu thdi gian
tinh todn, phu hpp khd nang may tinh hi?n cd
vd khdng dnh hudng den kit qua ldi gidi, md
hinh hinh hpc dupc lupc bdt cdc chi tiet nhd
nhu dinh tan Id nhd vd mdp vdt nhd
- Thilt Igp thupc tinh vdt lieu: Cdc
thupc tinh cua cdc logi vat lieu AMg-6 vd th6p
C45 dupc xay dyng trong thu vien cua ANSYS
Workbench tai myc Engineering Data Sau dd,
cdc vat li?u ndy se dupc gdn tuong ung cho cdc
chi tiet cua ket cau
- Thilt lgp kieu tilp xuc (Comiections)
giua cdc chi riit: Su dyng 2 loai lien ket cho
cac chi riit Uong kit c4u la lien kit cho phep
trupt theo bl mat tiep xuc (No Seperation) ddi
vdi lien ket ciia tryc ngang vdi gdc canh vd gan
dpc, lien kit gdn ch|it (Bonded) ddi vdi cdc be
mat tiep xdc cdn lgi
- Chia ludi: Bdn chdt ciia viec chia ludi
Id rdi rac hda ket cau 3D cdnh ndng thdnh cdc
p h ^ tii ludi Ludi dupc chia la ludi hi dien, mdi
phin tu ludi cd 4 nut tgi 4 dinh ciia hi dien lien
kit vdi cac phdn tu khac.Thiet lap kich thudc
toi thilu cho phdn tu ludi Id 10 mm Nhgn dupc
md hinh ludi, gdm; 183647 nut va 93941 phdn
tir nhu hinh 5
Hmh 5 Mo hinh lu&i cdnh ndng
- Thilt lap cac rang bupc (dieu kien
bien): Thilt lap thudc tmh ngdm (Fixed Support) tai be mat gdc cdnh do cdnh ldi gdn Cling vdi thdn tai be mat gdc canh Cdc be mgt khdc de ty do
- Dat tdi Upng tdc dyng: Tdi Upng khi dpng tac dyng coi la luc tap trung, gdm 3 thdnh phdn theo cdc phuong tuong ung vd cd diem ddt tgi tdm dp Ddi tupng tac dung la toan bd be mat chdy bao ciia cdnh
3.2 Giai bai todn vd xir 1^ kit qud Tiln hanh gidi Idn lupt hing trudng hpp
md phdng iing vdi gid tri cua cdc thdtih phdn tdi Upng khi dpng theo bdng 1 Thanh phan F^ coi nhu khdng ddi
Trong dd, gid tri tdi Upng ciia THI Id luc khi dpng tac dung cdnh ndng CN3 khi ten lua bat ddu chuyen sang bay bang Ta tang ddn gid tri tdi Upng nay de khap sdt trang thai iing sudt bien dgng d muc dp chiu tdi cao hon cung nhu de ddnh gid sy dam bdo ciia h? sd an todn cua tdi Upng lam viec ddi vdi ket cdu cd san
Trong bdi todn ta quan tdm den trgng thdi ung suat - bien dang cua ket cau nen Uong myc Solution cdn thiet lap trudng phdn bd cho 2 tham sd la iing sudt (von-Mises SUess) vd bien dgng ti ddi (von-Mises Elastic SUain) Sau moi ldi gidi quan sdt ket qua tren mdi trudng phdn
bo vd luu Igi gid tri cyc dai cumg nhu vj tri xuat hien cua cac tham sd ^
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Trang 5NGHieNCCrU-TRAOeOl
Bdng / Bdng cdc tru&ng hgp tinh todn:
XT
F.(N)
F,(N)
F ( N )
F„(N)
THI
11.65
960
-852
1283.60
TH2 11.65
1250 -1250 1767.81
TH3 11.65
1500 -1500 2121.35
TH4 11.65
2000 -2000 2828.45
THS 11.65
3000 -3000 4242.66
TH6 11.65
4000
^(000 5656.87
TH7 11.65
5000 -5000 7071.08
4 KET QUA M 6 PHONG
Kdt qui md phdng nhin dugc trudng phan bo ling suit va bien dang tren cic chi tidt kit ciu
cinh ning: (Jng suit cgc dgi a^^ vi bidn dang ti ddi cgc dgi e^^ trong cic trudng hgp tinh d^u xuit
hign tai true chinh bin cinh nang (hinh 6)
Hinh 6 lfng sudt cifc dgi xuit hien tgi hyc chinh bdn canh nang
T4 cac tnidng hgp tinh toan ung vdi cic gdc lech cinh lii vi vin tdc khic nhin dugc bing tdng hpp sau:
Bang 2 Bdng ing sudi arc dgi o _ (MPaJ vd bien dgng ti doi cifc dgi e
F„(N)
- ( M P )
^ ™
1283.60
103.52
0.0014
1767.81 139.42 0.0020
2121.35 167.31 0.0024
2828.45 223.08 0.0031
4242.66 334.62 0.0047
5656.87 446.16 0.0063
7071.08 557.70 0.0079
Bien dang ti doi cite dgi
' 0.0000
0 2000 4000 6000 8000
a)
Ung suit cttc dgi <T„, (MPa)
B 0 2000 4000 6000 8000
If
Hmh 7 Bd thi phg thugc ung sudt cue dai (a) vd bidn dgng ti ddi cifc dgi (b) theo life Fy
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Tii bang sd li|u vd do thi su phu thupc
nhan thdy, khi tang ddn tdi Upng khi dpng thi
ling sudt c ^ dai va bidn dang cue dgi cung tang
tuyen tinh Dieu ndy Id phu hpp vdi ddc tinh
vdt lieu do khi cdn o trong gidi hgn bin thi iing
sudt cue dgi vd bien dang cyc dai ludn ti le vdi
tdi tdc dung C} gia tri tdi trpng khi ddng lam
vi?c 1283.6 (N) ting sudt cue dai dat 103,52
(MPa) Neu so sdnh vdi gid tri iing sudt tdi hgn
chdy ciia vdt lipu hpp kim nhdm AMg-6 la 160
(MPa) thi cdnh ndng ddm bdo khd nang ldm
vi?c vdi hp sd dy Uu bfin lua chpn la f = 1,5
Neu so sdnh gia tri iing suat cue dai dgt dupc
vdi (ing suat tdi hgn ben cua vgt h?u ciing vdi
h§ sd du tru bin f = 1,5 thi cdnh ndng ten lua cd
the Idm viec vdi gid tri tdi Upng khi dpng ddn
2.800 (N)
Vdi hau hfit cdc kim logi vd hpp kim,
ranh gidi biln dgng ddn hdi iing vdi dp bien
dgng & Id 0,005; nhung ranh gidi bien dgng dep
ling vdi dp biln dang e la 0,002, nlu ldy tieu
chudn bien dgng deo de ddnh gid, so sdnh vdi
bdng bien dgng cyc dgi, chpn hp sd an todn f=
1,5 thi cdnh ndng chi dam bdo dp bin khi tdi
Upng khi d$ng dat 1283.6 (N) Dilu ndy hodn
todn phii hpp do kfit cdu dupc chpn de khdo sdt
Id kfit cau cd sdn, khi tinh todn thiet ke da dupc
toi uu ve khdi lupng vd ket cau
Nhgn thay, iing sudt cyc dgi vd bien
dgng c\tc dgi xudt hipn d tryc chlnh bdn cdnh
ndng, do dd, neu mudn nang cao khd nang Idm
vipc ciia cdnh ndng cd thfi thay ddi kdt cdu cung
nhu vgt lipu chl tgo tryc chinh bdn cdnh Tuy
nhien, vipc thay ddi cdn phdi tinh den nhting
dnh hudng cua khdi Iupng mang lgi, do khoi
hipng tdi ira Iudn Id dilm quan tam nhdt doi vdi
cdc tiiilt bi bay
5 KET L U ^
Bdi bdo su dyng phdn mem md phdng ANSYS Structural trfin co scr phuong phdp phdn tOr hihi han de gidi bdi todn xdc dinh trudng ting sudt - bien dang cua cdnh nang ten liia ddi ham Kh-35E Phdn mfim md phdng cho phep khdo sdt dupc trang thdi iing suat vd bien dgng cua ket cdu dudi tdc dyng cua tdi trpng khi ddng cdnh ndng ten lua Kh-35E thay ddi Qua
dd danh gia dupc khd nang chju tdi ldn nhat cua kit cdu vd dfi xuat gidi phap tang gidi han Idm viec ciia kit cau dya vdo vi tri xuat hifin iing sudt vd biln dgng cyc dgi Phuong phdp ndy, cd the dupc sii dyng dfi nghifin ciiu dnh hudng cua cac dang tdi Upng khdc nhau din trgng thdi iing suat - bien dang cdc phan tu tiidn - canh khdc ciia thilt bi bay •
Ngdy nhan bdi: 12/8/2016 Ngdy phan bien: 16/9/2016
Tai li^u tham khao:
[1] Phgm Thi$n Han, (2015);"A/g/i/cn ciiu thiet
ke thdn cdnh vd che thtr theo mdu thdn vo khoang chien ddu cua Ten lua Kh-35B^\
\^?n Khoa hpc - Cdng nghS Quan sy
[2] Trdn Due Trung, Cao Bd Ninh (2005); Tinh
todn thiet ki mdu nguyen ly vd trien khai che tao mpt so cpm chirc nang cua ten lua hanh trinh doi hdi v&i van tdc bay du&i dm, Vien
Khoa hpc - Cdng nghe Quan sy
ISSN 0866 - 7056
TAP CHf CO KHi V I £ T NAM, Sd 10 nam 2016