Altair Case Studies Improving Rudder Shock Loading Following a Nearby Blast Event Using RADIOSS

	Improving Rudder Shock Loading Following a Nearby Blast Event Using RADIOSS Altair

Improving Rudder Shock Loading Following a Nearby Blast Event Using RADIOSS

Altair

Technology Category	Application Infrastructure & Middleware - Event-Driven Application Sensors - Gyroscopes
Applicable Industries	Buildings Marine & Shipping
Applicable Functions	Product Research & Development Quality Assurance
Use Cases	Structural Health Monitoring Tamper Detection
Services	Testing & Certification
Challenge	The challenge was to assess the capability of a ship's rudder assembly to withstand the shock loading following a nearby blast event. This was a critical task as the engineers in the Marine, Shipbuilding, and Offshore industries face many design challenges including physical space constraints, extreme weather conditions, deep water and remote locations. These constraints create an extreme environment for the engineer to develop a sound, reliable and safe operating platform. Prior to the installation of a modified design of a ship's steering gear, it was required to assess the capability of the rudder assembly to withstand the shock loading following a nearby blast event. Read More
About Customer	Assystem is a company with 50 years of experience and has become a key partner of the world's largest industrial groups including Airbus, Areva, Alstom, EDF, EADS, General Electric, MTU, Peugeot, Renault, Rolls-Royce, Safran, Thales and more. They are involved in designing and developing the products and services of tomorrow, building and ensuring the optimum use of their investments throughout the life cycle, coordinating and executing the realisation of their projects and infrastructure. Assystem's engineering teams make the difference and instil trust. Read More
Solution	To solve this problem, Assystem conducted dynamic explicit analysis using elastic-plastic material models. The mesh was produced using Altair's high performance finite element pre-processor HyperMesh, the analysis was conducted in leading structural solver RADIOSS, and the results were reviewed using post-processing tool HyperView. Multiple loading scenarios were solved to ensure that the limiting behaviour was captured. The model was verified using a combination of test cases compared to empirical solutions, by review of the in-built quality checks, and through monitoring output. In addition to strength checks, sectional forces and seal displacements were assessed. Design improvements have been implemented, based on the results of the analysis. The rudder carrier legs were strengthened to improve the bending resistance. Read More Log in to view content
Contents

Technology Category

Application Infrastructure & Middleware - Event-Driven Application

Sensors - Gyroscopes

Applicable Industries

Buildings

Marine & Shipping

Applicable Functions

Product Research & Development

Quality Assurance

Use Cases

Structural Health Monitoring

Tamper Detection

Services

Testing & Certification

Challenge

The challenge was to assess the capability of a ship's rudder assembly to withstand the shock loading following a nearby blast event. This was a critical task as the engineers in the Marine, Shipbuilding, and Offshore industries face many design challenges including physical space constraints, extreme weather conditions, deep water and remote locations. These constraints create an extreme environment for the engineer to develop a sound, reliable and safe operating platform. Prior to the installation of a modified design of a ship's steering gear, it was required to assess the capability of the rudder assembly to withstand the shock loading following a nearby blast event.

About Customer

Assystem is a company with 50 years of experience and has become a key partner of the world's largest industrial groups including Airbus, Areva, Alstom, EDF, EADS, General Electric, MTU, Peugeot, Renault, Rolls-Royce, Safran, Thales and more. They are involved in designing and developing the products and services of tomorrow, building and ensuring the optimum use of their investments throughout the life cycle, coordinating and executing the realisation of their projects and infrastructure. Assystem's engineering teams make the difference and instil trust.

Solution

To solve this problem, Assystem conducted dynamic explicit analysis using elastic-plastic material models. The mesh was produced using Altair's high performance finite element pre-processor HyperMesh, the analysis was conducted in leading structural solver RADIOSS, and the results were reviewed using post-processing tool HyperView. Multiple loading scenarios were solved to ensure that the limiting behaviour was captured. The model was verified using a combination of test cases compared to empirical solutions, by review of the in-built quality checks, and through monitoring output. In addition to strength checks, sectional forces and seal displacements were assessed. Design improvements have been implemented, based on the results of the analysis. The rudder carrier legs were strengthened to improve the bending resistance.

Impact #1	The operational results of the solution were significant. The initial design of the rudder carrier showed excessive plasticity in the lower legs produced by a bending moment resulting from impact between the rudderstock and carrier. The rudder carrier legs were therefore strengthened by connecting to the seal carrier to improve the bending resistance. The sectional properties were also increased at the shoulders. This improvement in the design of the rudder carrier legs not only enhanced the strength of the rudder assembly but also increased its ability to withstand shock loading following a nearby blast event. The use of simulation technologies to improve design efficiency and reduce physical testing costs continues to become one of the best ways to address engineering challenges in the marine industry.

Impact #1

The operational results of the solution were significant. The initial design of the rudder carrier showed excessive plasticity in the lower legs produced by a bending moment resulting from impact between the rudderstock and carrier. The rudder carrier legs were therefore strengthened by connecting to the seal carrier to improve the bending resistance. The sectional properties were also increased at the shoulders. This improvement in the design of the rudder carrier legs not only enhanced the strength of the rudder assembly but also increased its ability to withstand shock loading following a nearby blast event. The use of simulation technologies to improve design efficiency and reduce physical testing costs continues to become one of the best ways to address engineering challenges in the marine industry.

Benefit #1	not mentioned

Benefit #1

not mentioned

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Overview

Improving Rudder Shock Loading Following a Nearby Blast Event Using RADIOSS

Operational Impact

Quantitative Benefit