OWENSPreComp

Struct for holding inputs to OWENSPreComp.properties()

Struct type for holding outputs of OWENSPreComp.properties()

Struct for holding inputs to OWENSPreComp.properties()

embed_ls(x, nodes_l, xnode_l, ynode_l)

purpose: embed a node in the lower-surface airfoil section nodes NOTE: nodal x coordinates must be in ascending order

Arguments:

• x::Real: x-coordinate of node to be embedded in the l-surf
• nodes_l::Int: no of current nodes on the lower surface
• xnode_l::Array{<:Real,1}: x-nodes on lower surface
• ynode_l::Array{<:Real,1}: y-nodes on lower surface

Outputs:

• nodes_l: revised no of current nodes on lower surface
• xnode_l: x-nodes on lower surface
• ynode_l: y-nodes on lower surface
• y: y-coordinate of node embedded in the l-surf
• newnode : number of the embedded node

embed_us(x, nodes_u, xnode_u, ynode_u)

purpose: embed a node in the upper-surface airfoil section nodes NOTE: nodal x coordinates must be in ascending order

Arguments:

• x::Real: x-coordinate of node to be embedded in the u-surf
• nodes_u::Int: no of current nodes on the upper surface
• xnode_u::Array{<:Real,1}: x-nodes on upper surface
• ynode_u::Array{<:Real,1}: y-nodes on upper surface

Outputs:

• nodes_u: revised no of current nodes on upper surface
• xnode_u: x-nodes on upper surface
• ynode_u: y-nodes on upper surface
• y: y-coordinate of node embedded in the u-surf
• newnode : number of the embedded node

properties(chord::Array{<:Real,1}, tw_aero_d::Array{<:Real,1},
tw_prime_d::Array{<:Real,1}, le_loc::Real, xnode::Array{<:Real,1},
ynode::Array{<:Real,1}, e1::Array{<:Real,1}, e2::Array{<:Real,1},
g12::Array{<:Real,1}, anu12::Array{<:Real,1}, density::Array{<:Real,1},
xsec_nodeU::Array{<:Real,1}, n_laminaU::Array{Int64,1},
n_pliesU::Array{Int64,1}, t_lamU::Array{<:Real,1},
tht_lamU::Array{<:Real,1}, mat_lamU::Array{Int64,1},
xsec_nodeL::Array{<:Real,1}, n_laminaL::Array{Int64,1},
n_pliesL::Array{Int64,1}, t_lamL::Array{<:Real,1},
tht_lamL::Array{<:Real,1}, mat_lamL::Array{Int64,1},
loc_web::Array{<:Real,1}, n_laminaW::Array{Int64,1},
n_pliesW::Array{Int64,1}, t_lamW::Array{<:Real,1},
tht_lamW::Array{<:Real,1}, mat_lamW::Array{Int64,1})

Calculates span-variant structural properties for composite blades

Inputs

• chord::Real: section chord length (m)
• tw_aero_d::Real: section twist angle (deg)
• tw_prime_d::Real: derivative of section twist angle w.r.t. span location (deg/m)
• le_loc::Real: leading edge location relative to reference axis (normalized by chord)
• xnode::Array{<:Real,1}: x airfoil coordinates starting at leading edge traversing upper surface and back around lower surface
• ynode::Array{<:Real,1}: y airfoil coordinates starting at leading edge traversing upper surface and back around lower surface
• e1::Array{<:Real,1}: E1
• e2::Array{<:Real,1}: E2
• g12::Array{<:Real,1}: G12
• anu12::Array{<:Real,1}: Nu12
• density::Array{<:Real,1}: density
• xsec_nodeU::Array{<:Real,1}: upper surface normalized chord location of sector boundaries
• n_laminaU::Array{Int64,1}: upper surface number of lamina in each sector
• n_pliesU::Array{Int64,1}: upper surface number of plies
• t_lamU::Array{<:Real,1}: upper surface ply thickness (m) for the lamina
• tht_lamU::Array{<:Real,1}: upper surface orientation (deg) for the lamina
• mat_lamU::Array{Int64,1}: upper surface material id for the lamina
• xsec_nodeL::Array{<:Real,1}: lower surface normalized chord location of sector boundaries
• n_laminaL::Array{Int64,1}: lower surface number of lamina in each sector
• n_pliesL::Array{Int64,1}: lower surface number of plies
• t_lamL::Array{<:Real,1}: lower surface ply thickness (m) for the lamina
• tht_lamL::Array{<:Real,1}: lower surface orientation (deg) for the lamina
• mat_lamL::Array{Int64,1}: lower surface material id for the lamina
• loc_web::Array{<:Real,1}: web normalized chord location of sector boundaries
• n_laminaW::Array{Int64,1}: web number of lamina in each sector
• n_pliesW::Array{Int64,1}: web number of plies
• t_lamW::Array{<:Real,1}: web ply thickness (m) for the lamina
• tht_lamW::Array{<:Real,1}: web orientation (deg) for the lamina
• mat_lamW::Array{Int64,1}: web material id for the lamina

Outputs:

• eifbar: ei_flap, Section flap bending stiffness about the YE axis (Nm2)
• eilbar: ei_lag, Section lag (edgewise) bending stiffness about the XE axis (Nm2)
• gjbar: gj, Section torsion stiffness (Nm2)
• eabar: ea, Section axial stiffness (N)
• eiflbar: s_fl, Coupled flap-lag stiffness with respect to the XE-YE frame (Nm2)
• sfbar: s_af, Coupled axial-flap stiffness with respect to the XE-YE frame (Nm)
• slbar: s_al, Coupled axial-lag stiffness with respect to the XE-YE frame (Nm.)
• sftbar: s_ft, Coupled flap-torsion stiffness with respect to the XE-YE frame (Nm2)
• sltbar: s_lt, Coupled lag-torsion stiffness with respect to the XE-YE frame (Nm2)
• satbar: s_at, Coupled axial-torsion stiffness (Nm)
• z_sc: x_sc, X-coordinate of the shear-center offset with respect to the XR-YR axes (m)
• y_sc: y_sc, Chordwise offset of the section shear-center with respect to the reference frame, XR-YR (m)
• ztc_ref: x_tc, X-coordinate of the tension-center offset with respect to the XR-YR axes (m)
• ytc_ref: y_tc, Chordwise offset of the section tension-center with respect to the XR-YR axes (m)
• mass: mass, Section mass per unit length (Kg/m)
• iflap_eta: flap_iner, Section flap inertia about the YG axis per unit length (Kg-m)
• ilag_zeta: lag_iner, Section lag inertia about the XG axis per unit length (Kg-m)
• tw_iner_d: twinerd, Orientation of the section principal inertia axes with respect the blade reference plane, θ (deg)
• zcm_ref: x_cm, X-coordinate of the center-of-mass offset with respect to the XR-YR axes (m)
• ycm_ref: y_cm, Chordwise offset of the section center of mass with respect to the XR-YR axes (m)
• n_af_nodes: number of airfoil nodes
• n_materials: number of materials
• n_sctU: number of sectors on upper
• n_sctL: number of sectors on lower
• nwebin: number of webs
• n_laminaTotalU: total number of lamina on upper
• n_laminaTotalL: total number of lamina on lower
• n_laminaTotalW: total number of lamina on webs

properties(pc_input::Input)

Calculates span-variant structural properties for composite blades. Holds all inputs and outputs to properties function in structs

q_bars(mat, thp, density, q11, q22, q12, q66)

Arguments

• mat: material id
• thp: ply orientation
• density:
• q11:
• q22:
• q12:
• q66:

Outputs

• qbar11:
• qbar22:
• qbar12:
• qbar16:
• qbar26:
• qbar66:
• rho_m:

readcompositesection(fname::String,locw::Array{Float64,1})

Reads a composite section input file. Returns locU, nlaminaU, npliesU, tU, thetaU, matidxU, locL, nlaminaL, npliesL, tL, thetaL, matidxL, locW, nlaminaW, npliesW, tW, thetaW, mat_idxW

readmain("fname::String")

Reads a main OWENSPreComp input file. Returns sloc,leloc,chord,twaero,afshapefile,intstrfile, ibspstn,obspstn,ibchloc,obchloc

readmaterials(fname = "materials.inp")

reads material properties from OWENSPreComp materials input file fname returns e1,e2,g12,nu12,rho,name

readprecompprofile(filename::String) Reads precomp profile file. Returns xu, yu, xl, yl

readprofile(filename::String, numHeaderlines::Int64, LEtoLE::Bool) Reads precomp profile file. Returns xu, yu, xl, yl

readsectorsfromfile(f::IOStream, n_sector::Int64)

Reads OWENSPreComp sector. Returns nlamina,nplies, t, theta, mat_idx

seg_info(ch, rle, nseg, nseg_u, nseg_p, xnode_u, ynode_u,
xnode_l, ynode_l, ndl1, ndu1, loc_web, weby_u, weby_l, n_scts,
xsec_node)

NOTE: coord transformation from xaf-yaf to yre-zref and seg info

tw_rate(naf, sloc, tw_aero)

Arguments

• naf: no of blade stations
• sloc: vector of station locations
• tw_aero_d: vector of twist distribution in degrees

Outputs

• th_prime_d: vector of twist rates in degrees