Untitled

import orcaflex
import numpy as np

def evaluate_results(model):
    """
    Evaluate the bending moment and Von Mises stress in the model.
    """
    max_bending_moment = 0
    max_von_mises_stress = 0

    for line in model.Lines:
        line_results = line.StaticState

        max_bending_moment = max(max_bending_moment, max(line_results.BendingMoment))
        max_von_mises_stress = max(max_von_mises_stress, max(line_results.VonMisesStress))

    return max_bending_moment, max_von_mises_stress

def optimize_model(file_path, iterations=50):
    """
    Optimize the OrcaFlex model for minimal bending moment and Von Mises stress.

    Args:
        file_path (str): Path to the OrcaFlex model file (.dat or .sim).
        iterations (int): Number of optimization iterations.

    Returns:
        None
    """
    model = orcaflex.Model(file_path)

    # Define optimization parameters
    support_height_range = np.linspace(1.0, 5.0, 10)  # Example: 1m to 5m
    stinger_angle_range = np.linspace(5, 20, 10)  # Example: 5 to 20 degrees
    winch_tension_range = np.linspace(100, 500, 10)  # Example: 100kN to 500kN

    best_bending_moment = float('inf')
    best_von_mises_stress = float('inf')
    best_configuration = {}

    for i in range(iterations):
        for support_height in support_height_range:
            for stinger_angle in stinger_angle_range:
                for winch_tension in winch_tension_range:
                    # Adjust model parameters
                    model.Supports[0].Height = support_height
                    model.Stingers[0].Angle = stinger_angle
                    model.Winches[0].Tension = winch_tension

                    # Recalculate static state
                    model.CalculateStatic()

                    # Evaluate results
                    bending_moment, von_mises_stress = evaluate_results(model)

                    # Update the best configuration if criteria are met
                    if (bending_moment < best_bending_moment and
                        von_mises_stress < best_von_mises_stress):
                        best_bending_moment = bending_moment
                        best_von_mises_stress = von_mises_stress
                        best_configuration = {
                            'Support Height': support_height,
                            'Stinger Angle': stinger_angle,
                            'Winch Tension': winch_tension,
                        }

    print("Best Configuration:")
    print(f"Support Height: {best_configuration['Support Height']} m")
    print(f"Stinger Angle: {best_configuration['Stinger Angle']} degrees")
    print(f"Winch Tension: {best_configuration['Winch Tension']} kN")
    print(f"Minimal Bending Moment: {best_bending_moment} Nm")
    print(f"Minimal Von Mises Stress: {best_von_mises_stress} Pa")

    # Save the optimized model
    optimized_file = file_path.replace('.dat', '_optimized.dat')
    model.SaveAs(optimized_file)
    print(f"Optimized model saved as {optimized_file}")

# Example usage
file_path = "your_model_file.dat"  # Replace with your OrcaFlex model file path
optimize_model(file_path)