MAESTRO Structural Analysis Software

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Modeling/Analysis/Evaluation

MAESTRO is a robust structural design and analysis tool specifically tailored to the needs of naval architects. The program is a synthesis of Finite Element Analysis (FEA), failure analysis, and mathematical optimization, geared toward the design of large, complex thin-walled structures.

The MAESTRO module includes a graphical modeler and full post-processing capability that offers full model viewing and generation of loads for input to the MAESTRO Analysis/Evaluation Solver. Post-processing includes such features as graphical display of loads, deflections, stresses, and failure evaluation results from the MAESTRO Analysis/Solver.

Analysis and evaluation are also performed within the MAESTRO module, completing an FEA and structural integrity evaluation (failure modes and other limit states) of every member and every load case.

The solver performs three integrated tasks:

• Finite element analysis to obtain the actual stresses and deflections throughout the model for all load cases
• Calculation of the failure stresses for all relevant modes of failure, for every member and every load case
• A complete evaluation of the structural adequacy of every member under each load case, and thereby obtaining a rigorous assessment of the current design of the structure, which includes identifying the most critical failure mode and load case for each member

Request Data Sheet

MAESTRO v9.0.8 New and Enhanced Features

• Sparse Out-Of-Core (OOC) Solver
• Inertia Balance
• Longitudinal Bending Moments
• Bending Moment/Shear Plots
• Load Balancing Verification Documentation

Fine Mesh Analysis

The MAESTRO Fine Mesh module allows the user to create refined 3-D FEA models of any portion of the MAESTRO model quickly. The user creates a group made up of elements from the "area of interest" then refines the group based on two options:

1. In the Top-down mode, Fine Mesh Analysis applies displacements from the global analysis to the fine mesh model for boundary conditions
2. In the Embedded mode, Fine Mesh Analysis replaces the coarse mesh portion of the model with the fine mesh

MAESTRO users can perform local design analysis using either Top-down or Embedded modes

Eigenvalue Solver (Natural Frequency)

MAESTRO can compute the natural frequency of the ship in either air or water. When the analysis is done in water, the added mass of the water is automatically applied to the wetted elements.

MAESTRO performs natural frequency with or without added mass

ALPS/ULSAP Features

• Ultimate limit state evaluation of unstiffened, uni-axially stiffened and cross-stiffened panels
• Any combination of load components, such as longitudinal axial compression or tension, transverse axial compression or tension, edge shear, longitudinal in-plane bending, transverse-in-plane bending-and lateral pressure can be applied
• Either steel or aluminum alloy material can be dealt with, considering the softening effect in the heat affected zone caused by welding
• Initial imperfections in form of initial deflections and welding residual stresses are dealt with as parameters of influence
• Various types of structural degradation such as corrosion wastage (general or pitting), fatigue cracking-and local denting are dealt with as parameters of influence
• Impact pressure action arising from sloshing, slamming and green water can be analyzed for providing permanent set in terms of panel deflection

ALPS/HULL Features

• Progressive collapse analysis of ship hulls until and after the ultimate limit state is reached, using simplified nonlinear finite element method (idealized structural unit method)
• Any combination of hull girder load components, namely vertical bending, horizontal bending, sectional shear and torsion can be applied
• Either steel or aluminum alloy material can be dealt with, considering the softening effect in the heat affected zone caused by welding
• Initial imperfections in form of initial deflections and welding residual stresses are dealt with as parameters of influence
• Various types of structural degradation, e.g., corrosion wastage (general or pitting), fatigue cracking-and local denting are dealt with as parameters of influence

Nastran Translator

This module translates either the entire MAESTRO finite element model or a portion thereof into Nastran, including loads. Alternatively, Nastran models can be translated into MAESTRO.

Optimization

The MAESTRO Optimization module uses sequential linear programming to redesign the structure. This optimization eliminates any structural inadequacies while achieving an optimum design based on user specified objectives (goals), which may be least weight or least cost or even both of these, in a weighted non-dimensional combination. In its optimization mode MAESTRO iterates the structure through design cycles in which it revises scantlings, reruns the finite element analysis, and reevaluates the structural adequacy of each member for all failure modes and load cases. This iterative process continues until the structure has converged to an optimum design that has no structural inadequacies.