ANSYS Software Enhances Design to Keep Flood Waters at Bay

SOUTHPOINTE, Pa. — (BUSINESS WIRE) — May 27, 2009 ANSYS, Inc. (NASDAQ: ANSS), a global innovator of simulation software and technologies designed to optimize product development processes, today announced that its software has been successfully used to build pumping station platforms in storm-prone New Orleans. Engineers charged with improving water drainage pumping capacity faced a number of design challenges. Because the platforms are partially submerged, all design problems had to be identified and addressed before any construction began. In addition, the project needed to be completed prior to the onset of hurricane season. Work was contracted after one of the costliest and deadliest hurricanes in the United States, Katrina, devastated the Gulf Coast. When Category 2 hurricane Gustav hit in 2008, the platforms and pumps successfully kept flood waters in check, validating the accuracy of the ANSYS® simulation results.

When a hurricane or other major weather event hits, high-power pumping units must work at full capacity to drain excess water out of sub-sea level New Orleans. The heavy equipment — turbine pumps, diesel engines, gearboxes and associated piping — produce vibrations and other stresses that can cause the massive platforms supporting the equipment to fail. Design and analysis consultant Mechanical Solutions, Inc. (MSI), working for the platform design-build contractor Weston Solutions, Inc., used software from ANSYS to simulate these stresses in the pumping platform along the 17th Street Canal, ensuring that the system would perform optimally during storms.

Simulation-driven design using ANSYS software allows companies to determine potential problems early in the design phase, long before a structure or product is built. In addition, many different design modifications can be rapidly simulated and the corresponding effects assessed. “Our approach with every project is to bring value to the table by identifying and mitigating risk early on to reduce the potential for costly modifications after construction has been completed. By using software from ANSYS to simulate the vibrational response of the platform, we were confident that the pumping system would perform optimally, and it did,” said William J. Kelly, principal engineer, Mechanical Solutions, Inc. “In addition, engineering simulation helped us meet a rigid deadline by identifying issues early in the design process so that the platform could be completed before hurricane season.”

MSI used its well-practiced design audit approach to characterize and predict the behavior of the system’s structural natural frequencies and vibration levels at various locations. The team accounted for soil conditions expected to play a role in the system platform’s vibrational response. Engineers performed analyses to assess forces imparted to the platform by the diesel engines, gearboxes and pumps. MSI also analyzed frequencies up to 120 hertz, which corresponded to the cylinder firing frequency for the diesel engines, and they accounted for rotating imbalance loads and phase conditions imposed by the gears and pump impellers. The results indicated that the worst-case loading occurred when the imbalance loads of all 11 pumps were in phase. Finally, MSI performed an acoustic evaluation of the discharge piping to assess the potential for acoustic resonance within the 9-foot diameter manifolds leading to the lake.

For downloadable images, visit http://www.ansys.com/newsimages.

About Mechanical Solutions, Inc.

Mechanical Solutions, Inc. (MSI), based in the United States, is a leading mechanical engineering firm that performs consulting and R&D. The company also provides design, analysis and testing services for a diverse range of project types throughout the world. MSI specializes in stress, thermal, finite element fluid dynamic, rotordynamic and experimental modal analyses. For more information, visit http://www.mechsol.com/index.html.

About ANSYS, Inc.

ANSYS, Inc., founded in 1970, develops and globally markets engineering simulation software and technologies widely used by engineers and designers across a broad spectrum of industries. The Company focuses on the development of open and flexible solutions that enable users to analyze designs directly on the desktop, providing a common platform for fast, efficient and cost-conscious product development, from design concept to final-stage testing and validation. The Company and its global network of channel partners provide sales, support and training for customers. Headquartered in Canonsburg, Pennsylvania, U.S.A., with more than 60 strategic sales locations throughout the world, ANSYS, Inc. and its subsidiaries employ approximately 1,700 people and distribute ANSYS products through a network of channel partners in over 40 countries. Visit www.ansys.com for more information.

ANSYS, ANSYS Workbench, Ansoft, AUTODYN, CFX, FLUENT and any and all ANSYS, Inc. brand, product, service and feature names, logos and slogans are registered trademarks or trademarks of ANSYS, Inc. or its subsidiaries in the United States or other countries. All other brand, product, service and feature names or trademarks are the property of their respective owners.



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