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A total solution for inboard noise analysis of ships


CAE software SNA jointly developed with Nippon Kaiji Kyokai, shipbuilding companies, and Tokai University is a total solution for inboard noise prediction calculation with major upgrade automatic modeling and convenient post processing.
Jupiter-ANA (Advanced Noise Analysis) is a software that has a series of excellent functions related to modeling, analysis condition setting, analysis execution, and evaluation for inboard noise analysis.

Pre-processing, solver (inboard noise prediction calculation), and post-processing are possible with one software, which facilitates the operation of considering countermeasures. For example, if you re-analyze by changing the analysis conditions, you can check the result after the countermeasure about 15 minutes.

There is also an automatic modeling function that uses AutoCAD drawing data (DXF format) and DataBase file (Excel format), so there is no problem even if you do not have 3D CAD.

* ANA is a major upgrade version with improved usability of our software SNA (Ship Noise Analysis).
* This product starts on the general-purpose CAE pre-post Jupiter. It is also possible to operate only the ANA function.
Jupiter-ANA has been developed with a ship-specific inboard noise prediction calculation system that combines the Simple Statistical Energy Analysis (SEA) and Janssen methods.
This makes it possible to consider countermeasures for the transmission route from noise sources such as the main engine and generator to the living room. In addition to solid propagating sound, it can handle air propagating sound, air conditioning / ventilation sound, outdoor blower sound, and chimney exhaust sound.

Features Features

Automatic modeling function

An analysis model is automatically created from the data of AutoCAD drawing data (DXF format) and DataBase file (Excel format).
Or model from importing a 3D CAD model. You can also manually edit the model if needed.
With various functions such as automatic modeling, you can easily check the noise analysis inside the ship.

Structural information and sound source settings

Apply the hull structure, sound receiving room, sound source data, etc. stored in the DataBase file to the model

1. Sound receiving room data Sound receiving room definition, vibration /
acoustic characteristics

2. Sound source data
Solid propagating sound, air propagating sound, air conditioning /
ventilation sound, outdoor blower sound, main engine / generator exhaust

3. Sound source room data
Room definition

4. Vibration propagation data
Hull structure data (Pillar, draft, tank), material properties

Post processing

Inboard noise analysis results
Once the forecast calculation is complete, the results will be visible.
The vibration speed, acceleration, energy, sound pressure level due to each propagated sound, and loss coefficient (internal loss, damping material, radiation, boundary) are displayed in contour.
Living room sound pressure level result
As a display method, it is possible to display a cross section at an arbitrary position, wire frame display, etc.

Post processing

Underwater radiation sound analysis
Not only the noise inside the ship, but also the underwater radiant sound can be simulated with the same tool.
* Underwater radiation sound analysis function is optional.
Result plot
There is also a chart function that plots the results for each room and the results for specified elements. Plot the output to an Excel file is also possible.
The file is formatted for easy comparison with measured values ​​and calculation results under different conditions.

Simple workflow to operate from left to right

All functions from import, modeling, analysis condition setting, noise prediction program execution, and evaluation are integrated into one ribbon.
Users can easily manupulate with a simple operation without any hesitation.

Workflow Workflow

Data input (DXF format + Excel OR GUI input)
Execution of noise prediction program
Evaluation of results (contour display on model Excel format data output)

Introduction of development background Introduction of development background

ANA is the most advanced version of our exisiting software SNA (Ship Noise Analysis).
SNA has been jointly developed by Tokai University, Hakodate Dock, Sanoyas Shipbuilding, Tsuneishi Shipbuilding, Utsumi Shipbuilding, Odo Shipbuilding, Shinraijima Shipbuilding, Imabari Shipbuilding, Namura Shipbuilding, Sasebo Heavy Industries, Oshima Shipbuilding, Japan Maritime Association (titles omitted, in no particular order), and supported under the "Joint Research by Industry Request" scheme of the Japan Maritime Association.