LMS: Automotive industry raves about new time-domain acoustic BEM solver

Power-packing technology responsible for better and faster acoustic design

The latest version of the simulation platform LMS Virtual.Lab Acoustics integrates a powerful time-domain BEM solver developed by IMACS, a spin-off of the Ecole Polytechnique in France. This powerful back-engine lets acoustic engineers perform realistic simulations very efficiently and gain more insight into a wide variety of acoustic issues including for instance engine injection ticks, tire noise and door slams - important brand aspects for the automotive industry.

Customers like PSA Peugeot Citroën have been using the time-domain BEM solver technology for several years to efficiently perform powertrain-related acoustic simulations. Denis Thenail of PSA explained, 'From very early on, PSA has recognized and supported the time-domain acoustic BEM technology developed by IMACS. For several years now, we have been using this solver for powertrain radiation, exterior vehicle acoustics and a variety of other applications. This solver is extremely efficient and robust enough to solve large BEM models -- both from a computation and memory point of view. As such, more cases can be addressed in less time, allowing more iterations to optimize vehicle acoustics. Today, we are glad to benefit from this technology in LMS Virtual.Lab, the simulation platform chosen by PSA.'

'The latest Rev 9 release of LMS Virtual.Lab Acoustics is in fact our biggest release in twenty years of development, building on LMS SYSNOISE and the previous releases of LMS Virtual.Lab Acoustics. This new robust time-domain BEM is an excellent solver for users dealing with impulsive or wide frequency noise issues. It is designed to handle the most complex models with the highest fidelity and efficiency levels possible. And it perfectly complements our other top-performing solvers like fast multipole BEM (FMBEM) and the FEM PML (Perfectly Matched Layer) technology added to our classic FEM solvers. Many of our OEM customers appreciate the flexibility of being able to work with either highly efficient FEM or BEM solvers - depending on their needs,' stated Stefaan Goossens, Vice President, Simulation Division, LMS International.

Producing acoustic simulation models with the highest fidelity possible gives engineers a better understanding of the 'why' behind a noise problem and a much better route to actually solving the issue at hand. Solvers are mission-critical 'number crunchers' incorporated in the simulation software that work behind the scenes to compute the crucial mathematical calculations and create the best possible model in the least amount of time. Fast solvers that run in hours as opposed to several days add tremendous value to a simulation platform. Powerful and robust solvers like time-domain acoustic BEM are designed to handle multi-frequency issues much more efficiently and with higher fidelity. For engineers who work with simulation software daily, this translates to more iterations within the product development cycle and adds to the product's overall quality.

About LMS International

LMS is an engineering innovation partner for companies in the automotive, aerospace and other advanced manufacturing industries. With approximately 30 years of experience, LMS helps customers get better products to market faster and turn superior process efficiency into key competitive advantages. With a unique combination of 1D and 3D simulation software, testing systems and engineering services, LMS tunes into mission critical engineering attributes, ranging from system dynamics, structural integrity and sound quality to durability, safety and power consumption. With multi-domain solutions for thermal, fluid dynamics, electrical and mechanical system behavior, LMS can address the complex engineering challenges associated with intelligent system design. Thanks to our technology and dedicated people, LMS has become the partner of choice of more than 5,000 manufacturing companies worldwide. LMS, a Dassault Systèmes SIMULIA partner, is certified to ISO9001:2008 quality standards and operates through a network of subsidiaries and representatives in key locations around the world. For more information on LMS, visit www.lmsintl.com.


IMACS is a French research and technology provider with activities centered on scientific computing and mathematical engineering. IMACS originated as a spin-off from the renowned Ecole Polytechnique in Paris, France. Over the past 15 years, IMACS has developed a portfolio of services and specialized products for numerical analysis with a focus on vibro-acoustics and electromagnetic simulation. The company provides its products and services to leading automotive and aerospace companies. For additional information on IMACS, visit http://imacs.polytechnique.fr

LMS Press Contacts:

Peter Vandeborne
Tel +32 16 384 200

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