BHGI utilizes state of the art computer modeling and design tools. The majority of our designs are drawn in AutoCAD, while three-dimensional modelers such as Rhino and IronCAD are utilized for hull and appendage modeling and design. BHGI’s structural design services include composite, steel, and aluminum structural design. Structural analysis services include first principles calculations, regulatory body rule calculations, and FEA using Autodesk Nastran with FEMAP and SkyCiv. BHGI engineers use Creative System’s General HydroStatics (GHS) program for hydrostatic and stability analysis. BHGI utilizes Orca3D Marine CFD/Simerics to perform CFD analysis. Orca3D is also utilized to generate highly accurate weight studies. Our engineers focus on the design of new vessels, re-powerings, and mechanical and electrical upgrades to existing vessels.

Hull models are generated by BHGI’s engineers and are run at various conditions to predict the performance of the vessel. BHGI uses CFD analysis to estimate ship hull performance in calm waters. This is especially useful when looking to optimize the vessel’s hull form to improve fuel economy. We have used our CFD capabilities to conduct comparative studies of barges, tugs, towboats, and ATB units. From these studies, hull form was able to be optimized to provide vessels with improved flow and resistance characteristics. CFD results include running waterline, resistance, wave train, pressure plots, and a variety of other analyses. BHGI uses these results to determine the best hull for its client’s needs. 

Using the latest FEA software and techniques, we can analyze existing projects as well as our own original designs. An analysis is possible for the entire vessel or for only certain areas of interest, such as a foundation that is expected to experience high loads. The fidelity of the analysis is determined and agreed upon ahead of time, and the analysis is carried out in an efficient and professional manner. Our FEA skills have allowed us to answer questions about many designs quickly and with a high degree of confidence. We regularly perform linear static, nonlinear static, buckling, contact, and transient dynamic analyses. Our experience also includes fluid-vessel interactions in various situations, both in still water and in a range of sea states. 

ANNIE MOORE is a 74’ x 24’ twin screw workboat. The vessel serves to transport passengers, supplies and equipment to Ellis Island from Battery Park, New York, N.Y. The main engines and generators are compliant with modern emission requirements and a custom, ice capable propeller was designed for the vessel to improve ice operations and overall propulsive efficiency. ANNIE MOORE was delivered in the Summer of 2021.

The first task is to analyze the feasibility of widening the DALE PYATT, while the second task is to perform Finite Element Analysis (FEA) of the crane and a section of the barge. BHGI performed an onsite inspection of the barge to corroborate the location of the structure and the crane and look at options for widening the vessel. BHGI will deliver an engineering report that provides the preliminary results of the feasibility study of widening the barge. Included in this report will be the results of preliminary strength, stability, and weight analyses, and a preliminary revised geometry drawing.

The replacement vessel will be 70’ x 22,’ classed by ABS as a Maltese Cross A-1, Maltese Cross AMS”  for Harbor and Coastal service. The vessel will also be inspected and certified by the U.S. Coast Guard under the Subchapter M program. The vessel will primarily serve as a drift collection vessel to lift and carry debris on the main deck. The primary area of operations is on rivers, inshore, coast and protected waters within the Baltimore District. Its secondary missions will also include survey support work and barge movement work.