Leuven, Belgium, 20 October 2013 – By contributing cutting-edge NVH know-how and design optimization, LMS successfully helped reduce the weight of the FutureSteelVehicle (FSV) concept car body structure without compromising NVH performance. As part of the team working on the FutureSteelVehicle project, commissioned by WorldAutoSteel, LMS focused on early stage NVH simulation taking into consideration the advanced steel materials and advanced steel technology used in both EV and HEV vehicle body design. As part of the FSV project, the LMS Engineering Services team was challenged to optimize the NVH performance in parallel to the design team, ensuring that the target of 190kg (or less) body in white (BIW) mass and functional performance for an EV was maintained.
“Achieving low body mass and good NVH performance simultaneously is perceived to be a contradictory objective. For crash, reconciliation comes from the extensive use of high strength steels. In NVH, using thinner materials usually has a negative impact on NVH behavior. For us, the challenge was to propose clever body design changes, which struck a balance between low mass and acceptable NVH performance,” stated Dirk De Vis, Vice-President, Automotive at LMS International.
To achieve this, the team derived NVH targets from benchmarking an existing ICE/EV car and cascaded objectives to specific body targets. Detailed attention was paid to differentiating ICE and EV acoustic signatures to set the correct FSV targets.
Using LMS Virtual.Lab, LMS engineers simulated design changes in a balanced iterative loop with the WorldAutoSteel design team. Working together this closely during the early stages meant that significant design optimization could be undertaken to guarantee NVH performance while at the same time managing the vehicle weight. Particular attention was paid on one hand to the low frequency structural performance, while on the other hand also optimizing the mid and high frequency with the acoustic sound package.
The end result was a final body concept that was 35% lighter than the benchmarked platform. Having exceeded the target, the project demonstrated that innovative steel technology, like vibration damping steel, is an excellent material choice for meeting the stringent body mass reduction targets of green vehicles without compromising the NVH context. It also proved that early consideration of NVH in parallel to the concept design brings significant benefits.
“Achievement of such aggressive weight reduction, accomplished with advanced steels and design optimization, will set a new standard for vehicle design approaches in the future,” concluded Cees ten Broek, Director, WorldAutoSteel. “Early adoption of NVH in the design process, provided through LMS’ strong expertise, contributed significantly to FSV’s mass reduction success and to its contribution as a viable solution for greener vehicles.”
LMS is a leading provider of test and mechatronic simulation software and engineering services in the automotive, aerospace and other advanced manufacturing industries. As a business segment within Siemens PLM Software, LMS provides a unique portfolio of products and services for manufacturing companies to manage the complexities of tomorrow’s product development by incorporating model-based mechatronic simulation and advanced testing in the product development process. 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 and mechatronic simulation solutions, LMS addresses the complex engineering challenges associated with intelligent system design and model-based systems engineering. Thanks to its technology and more than 1250 dedicated people, LMS has become the partner of choice of more than 5000 manufacturing companies worldwide. LMS operates in more than 30 key locations around the world.
Siemens PLM Software, a business unit of the Siemens Industry Automation Division, is a leading global provider of product lifecycle management (PLM) software and services with seven million licensed seats and more than 71,000 customers worldwide. Headquartered in Plano, Texas, Siemens PLM Software works collaboratively with companies, delivering open solutions to help them make smarter decisions that result in better products. For more information on Siemens PLM Software products and services, visit www.siemens.com/plm.
Note: LMS Virtual.Lab, LMS Imagine.Lab and SAMCEF are registered trademarks of LMS International or any of its affiliates. Siemens and the Siemens logo are registered trademarks of Siemens AG. All other trademarks, registered trademarks or service marks belong to their respective holders.
This press release was published by LMS International prior to Siemens PLM Software acquiring the company on January 3, 2013.