fixing PMtarget in old OpenMDAO model

src/SEAMRotor/SEAMRotor.py

@@ -16,7 +16,7 @@ class SEAMBladeStructure(Component):
     lifetime_cycles = Float(1.e7, iotype='in', desc='Equivalent lifetime cycles')
 
     wohler_exponent_blade_flap = Float(iotype='in', desc='Blade flap fatigue Wohler exponent')
-    PMtarget = Float(iotype='in', desc='')
+    PMtarget_blades = Float(1., iotype='in', desc='')
 
     rotor_diameter = Float(iotype='in', units='m', desc='Rotor diameter')
     MaxChordrR = Float(iotype='in', units='m', desc='Spanwise position of maximum chord')
@@ -189,7 +189,7 @@ class SEAMBladeStructure(Component):
         W = Ine/(thick/2.)
         sfat = np.maximum(1.e-6, self.safety_factor_blade*1.e3*Mfat_flap/ W / 1.e6)
         PM = self.lifetime_cycles/(pow(10, (self.stress_limit_fatigue_blade - self.wohler_exponent_blade_flap*np.log10(sfat))))
-        return abs(PM - self.PMtarget) / norm
+        return abs(PM - self.PMtarget_blades) / norm
 
     # Solving for t in edge direction, fatigue
     def solve_tfat_edge(self, t, C, thick, Mfat_edge, norm):
@@ -197,7 +197,7 @@ class SEAMBladeStructure(Component):
         W = Ine/(C/2.)
         sfat = np.maximum(1.e-6, self.safety_factor_blade*1.e3*Mfat_edge/W/1.e6)
         PM = self.lifetime_cycles/(pow(10, (self.stress_limit_fatigue_blade - self.wohler_exponent_blade_flap*np.log10(sfat))))
-        return abs(PM - self.PMtarget) / norm
+        return abs(PM - self.PMtarget_blades) / norm
 
     def plot(self, fig):
         """