55 lines
1.9 KiB
Fortran
55 lines
1.9 KiB
Fortran
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Program Balloon_Wrap
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!
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! Program to map an unfolded ballon geometry onto a folded configuration (Based on Laroche Paper)
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! Input: File containing nodal coords of ballon geometry (Abaqus INP Format)
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! Output: File containing nodal coords of mapped ballon geometry (Abaqus INP Format)
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! Rev. 1 - J. Grogan - 07/07/10
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!
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real pi,x_cor,y_cor,z_cor,theta,radius,theta_hat,rad_hat,alpha,beta,phi
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real inner_radius,outer_radius,num_folds,multiplier
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integer node_num
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logical outer_flap
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!
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open(unit=10,file='in.dat',status='old')
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open(unit=11,file='out.dat',status='unknown')
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!
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pi=acos(-1.)
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inner_radius=0.25
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outer_radius=0.43
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num_folds=3.
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phi=(2*pi)/num_folds
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outer_flap=.false.
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!
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do i=1, 9821
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read(10,*)node_num,x_cor,y_cor,z_cor
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theta=(atan2(z_cor,x_cor))
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radius=sqrt(z_cor*z_cor+x_cor*x_cor)
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!
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if(theta<0.)then
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theta=theta+2*pi
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endif
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!
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beta=(phi/2.)*(1.+(2*radius)/(inner_radius+outer_radius))
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alpha=((outer_radius+inner_radius)/(2*radius))*beta
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!
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do j=1,num_folds
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if((theta>=(j-1)*phi).and.(theta<=(alpha+(j-1)*phi)))then
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multiplier=j-1
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outer_flap=.true.
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elseif((theta>=(alpha+(j-1)*phi)).and.(theta<=(j*phi)))then
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multiplier=j
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outer_flap=.false.
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endif
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enddo
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!
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if(outer_flap)then
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theta_hat=(beta/alpha)*(theta-multiplier*phi)+multiplier*phi
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rad_hat=inner_radius+((outer_radius-inner_radius)/beta)*(theta_hat-multiplier*phi)
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else
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theta_hat=((beta-phi)/(phi-alpha))*(multiplier*phi-theta)+multiplier*phi
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rad_hat=inner_radius+((outer_radius-inner_radius)/(beta-phi))*(theta_hat-multiplier*phi)
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endif
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!
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write(11,*)node_num,',',rad_hat*cos(theta_hat),',',y_cor,',',rad_hat*sin(theta_hat)
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enddo
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end program
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