How does it work?

ExpressMarine uses parametric input to generate a detailed 3D structural model of your vessel directly within Rhino. This parametric approach ensures fast, flexible, and highly adaptable modeling — making it easy to accommodate design iterations and updates.

From the model, you can obtain the following key results:

Early-stage Structural Weight and Center of Gravity (CoG) calculations
Concept design volume definitions
Tonnage calculations
Early-stage Bill of Materials (BOM) generation
Section modulus calculations
Area calculations
Export of weight results to ShipWeight
Export of structural models to ShipConstructor via the Genesis API
Export of structures to OCX format for class approval

Starting Point

All you need to begin is a 3D hull surface and, optionally, a general arrangement (GA) drawing. The main structural objects are defined by their surfaces or surface positions, along with extrusion limits, to build up the ship’s structural framework.

Parametric Modelling of Main Objects

Each object is created with its associated metadata, such as material and thickness.
Defined objects can serve as geometric limits for subsequent elements, establishing dependencies between surfaces that make model updates quick and consistent.

Seams, Faceplates, Stiffeners, and Cutouts

These secondary structural elements are also defined parametrically. You can use predefined templates or freely trace custom geometries to place seams, faceplates, stiffeners, and cutouts directly on surfaces.

Volume Definition

Use the structural model’s objects as boundaries to define internal volumes. You can create addition or subtraction parts to model complex shapes as needed. Generate comprehensive volume and tonnage reports, complete with calculations and results derived from the defined volumes.

Section Modulus Calculations

A dedicated tool allows you to calculate key section properties, including:

Cross-sectional area
Neutral axis position (from baseline)
Moment of inertia

Export to Other Software

Your completed ExpressMarine model can be exported seamlessly to:

ShipWeight – for weight and CoG management
ShipConstructor – via the Genesis API
OCX format – for classification society approval