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J . , 2005 50175095 , 50374058) 19742) , 9 , 20042 L . o 00941 , 2. 66004 , of 2VC by of of of 2VC of VC on is of be to of of on is it is to of on of of of 42VC t he of he on an of t he of VC 1 . of t he on of t he t of t he VC t be 2st 2 3 . of of on t he of t t he t t to be so t he t of t t he 22C VC - 6 to no t he in t be or t EM to p of 7 . t he to be t he t he t of t he of t be t he of t be in t he In t t he 8 to t he t of t he to t he t of t he to of VC of t he 2VC of of 8 t he x . t he t he oy is in to , is n 1994 of s R is l is h of t of b is of b is of of he s at t he x = 0) i = 0 , 1 , 2 , , n) , t he x 0) of s t he t he s t he 2 ( t he , as In t he f y ( , , ) f z ( , , ) of to W y ( , , ) = f ( ) , ) , , ) = g ( ) , )(1) 10 11 , f ( ) = 1 + 4 l - 13+ 3 l - 14g ( ) = 1 - l - 12 (2) , ) , , ) f at t he of x = l) in in 2 J . , 1994 U t he t he h bi i - i - 1 = 1 ( i = 1 ,2 , , n) (3) , ) , ) as f t he to be t he as t he f t he t t st t nd t : , ) = i - 1 ,0) 1 ( ) + i ,0) 2 ( ) + u y , ( i - 1 ,0) 3 ( ) + u y , ( i ,0) 4 ( ) 0 ( ) + i - 1 ,1) 1 ( ) + i ,1) 2 ( ) + u y , ( i - 1 ,1) 3 ( ) + u y , ( i ,1) 4 ( ) 1 ( ) + i - 1 ,2) 1 ( ) + i ,2) 2 ( ) + u y , ( i - 1 ,2) 3 ( ) + u y , ( i ,2) 4 ( ) 2 ( ) (4) , ) = i - 1 ,1) 1 ( ) + i ,1) 2 ( ) + u z , ( i - 1 ,1) 3 ( ) + u z , ( i ,1) 4 ( ) 1 ( ) + 12 ) ) 2 ( ) (5) ( ) = ( i - )23 2 ( i - ) 2 ( ) = ( - i - 1 )23 2 ( - i - 1 ) 3 ( ) = ( i - )2 ( i - ) 4 ( ) = - ( - i - 1 )2 ( - i - 1 ) (6) 0 ( ) = 1 - 3 2+ 2 22 1 ( ) = 4 2- 22 2 ( ) = - 2+ 2 22(7) i , j) = i , j ) , i , 1) = i , 1 ) , u y , ( i , j) =5 i , j ) u z , ( i , 1) =5 i , 1 ) ( i = 0 , 1 , 2 , , n; j = 0 , 1 , 2) of 0 = 0 , 1 = 14 2 = 12 , ) , ) t he t he t he of uy uz u y , ( i , j) u z , ( i , 1) ( i = 0 ,1 , 2 , , n; j = 0 , 1 , 2) by t he to t he ( n + 1) i , j) i , 1) ( i = 0 , 1 , 2 , ,n; j = 0 , 1 , 2) t he t of be on t he of 10 - 13 , t he of t he ( , ) he ( , ) be 1 ( , ) = 1 + - 1 - 00 + 5 + 5 ) 0 ( , ) = 0 + 00 ( , ) + +5W +5W = (9)0 , S1 of xn of 1 , 0 f E is of ; v of ; 00 is be in of f of t he is 00 ( , ) = t he t he t in t he t he 5 x5 x +5 y +5 z = 05 x +5 y5 y +5 z = 05 x +5 y +5 z5 z = 0(10)at he of t he t he 14 at t he p = - n = - ( x x + y + z ) x - ( x + y y + z ) y - ( x + y + z z ) z (11)x , y , z , yz xz in x , y z , n is on t he x , y z of of t he at t in t he be of t he of t he is m s h h yi of i = 1 , 2 , 3 , , m) .72 2 1994 , is of 0 is 0 is y) is h q( y) is Fb at s he is t he t he t he s of f 1y j b (12)f 1y j ( p1 j - - w + ( C) (13) is t he as i 14) of 2VC of 2VC of , is he as 1 ij p1 j (15)f f 12 ( (16)of i + i (17)t of 2 i = y 22(18)of t f f w( m - i) + w( m - i) +12 ( m - i) ) + 19)i , j of i , j = 1 , 2 ,3 , , m ; s of t he at t he yi by at y j ; s of of t he t he yi by t he C2 s of t he of C is t he of f w , f b , wb , w of , Db of of f is of on t he of f s ; s0 is f 12) 14) 16) , t he of is t he of of so t he of m + 2) . In t m + 2) i = 1 , 2 , 3 , , m) , C1 2 , so it 2 J . , 1994 (15) 16) 19) , t t he t of be of 2VC of 2VC is is to of f , so is to h q t he t he of t he t . he ) of ( be of on t he on a 42VC t he st h of 235 t 91214 mm at 41477 mm he h of 00of 00 m. f 86150 of 077 a 50 mm a h 250 t he 500 mm a h 050t he of s 150 t he he s 150 of 300 of of 15998 0 ) 10 t he )VC 95 50 of by of h t he t w 077 75 - 25 25 mm 5 mm t he , h1 of p1 w 077 75 - 25 25 mm 5 mm h t he 1 3 - 75 mm 9 = 75 It t t , t he of p t he of of p1 w h t he w , h1 of p1 t he w is t t t he 1 at t he t he t 95 w 300 600 kN 00 kN ht he w , in at t he of on to t he of h on of to t he of ot in t he t 0 0 = 0) , Fw 1 2 2 1994 = - 75 = - 25 = 25 = 75 h1 1 077 a) = - 75 (b) = - 25 (c) = 25 (d) = 75 ( 1 077 0 2 300 3 600 4 900 w h1 = - 95 03 J . , 1994 (a) 0 (b) 300 (c) 600 (d) 900 w ( = - 95 mm)at t he as h1 p1 .

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