LMS发布创新技术 MP-BEM（多极边界元） 求解超大模型/高频 问题

top_dog

VL-VAM.41.2        LMS Virtual.Lab Fast Multipole Boundary Elements Acoustics (快速多极边界元声学)
description:        多极边界元模块运用迭代技术来求解边界元方程，通过基于多极扩展和多层次分级蜂窝子结构的高级算法，使得求解边界元方程的计算速度极大提高，同时内存消耗极大缩减，从而非常适合整车、整机等超大规模边界元模型的声学分析计算，并将声学分析直接拓展到高频应用。该模块同时支持多机/多CPU的计算机系统实现并行计算。

[ 本帖最后由 top_dog 于 2008-7-16 10:54 编辑 ]

top_dog

In the world of acoustic simulation, the trend is towards more complex simulations and higher frequencies. This translates to more complex meshes with more elements and the unfortunate pitfalls: more processing time and more computer resources. This is an engineering dilemma especially with teams facing faster and faster design timelines and more complex acoustic issues, such as full vehicle studies. Without the right tools, an acoustic calculation can take a serious bite out of development productivity. Not only does this cause budgetary pain, it can even put the project in jeopardy.

Thanks to a new solver in the recently released LMS Virtual.Lab Acoustics module, acoustic experts can forget about sitting around for days twiddling their thumbs waiting for results. Based on multipole expansion, this hyper-fast new solver does all the hard number crunching in couple of hours for larger systems or overnight for ultra-large problems.

“Until now, acoustic simulation experts have been limited by the size of the model, CPU capacity, project timing -- not to mention sheer data storage capability. LMS Virtual.Lab Acoustics Rev 8A features a multipole BEM solver. This breakthrough development is a lifesaver for anyone working on complex acoustics Boundary Element models ranging from 30,000 to 1 million elements and up,” enthused Koen De Langhe, Product Line Manager LMS Virtual.Lab Noise and Vibration.

Ideal for full vehicle exterior acoustics work, large off-road engines, complex gearboxes and practically any other high-frequency or hyper-complex model, this acoustic simulation module is based on multipole BEM technology developed first for the electromagnetic field by EADS Innovation Works, EADS’ research and technology production facility where this thoroughly validated solver is now applied and further developed to the field of acoustic simulation.

“Integrating multipole BEM technology complements LMS Virtual.Lab’s Acoustic BEM and FEM technologies while meeting the requests from our customers to apply acoustic simulation at higher frequencies and addressing ever more challenging acoustic requirements,” added Dr. Jan Leuridan, Executive Vice President and CTO of LMS International.

A selection of fine BEMs: Classic or Multipole?
LMS is the only company currently on the market to offer acoustic simulation users the widest variety of solver processing choices. Users can still rely on the classic LMS BEM solver, the reference in the sector for the past twenty years for small-to-medium models. Other users with large-scale and ultra-large scale, high-frequency issues and models will want to reap the benefits of the super-stealth processing power of the multipole BEM solver. Either solver gives the same reliable results.

“This is an exciting new solver that is going to change the world of acoustic simulation. In the US, LMS tested this new multipole BEM solver on a 400,000 element vehicle exterior model. Using a 32 CPU cluster, it took about a day to solve -- 26 hours to be precise --  up to 5000hz. Most of the resulting bands fell in the 2dB or 3dB range, which is excellent physical correlation,” adds Koen De Langhe. “Using a classic BEM, which is the reference in the acoustics industry, this timing would be practically impossible. Multipole BEM is a revolutionary way of solving acoustic models and we’ll be hearing a lot more about it in the near future.”

Another huge advantage of multipole BEM is that it is cluster-based and thoroughly scalable. This means that the solver can run on most standard-processing 64-bit Windows machines as well as larger clusters up to 128-node LINUX and higher.

This webex will explain the key technologies and the benefits of the Fast Multipole Boundary Element Method. Various application examples will demonstrate the benefits of this promising technology. Example will include vehicle exterior acoustics, powertrain radiation, ultrasonic sensor modeling, underwater acoustics,….
For these reference examples, accuracy and advantages will be demonstrated.
At the end, time will be reserved for a question and answer session to get further information on Fast Multipole BEM, LMS Virtual.Lab acoustics and it’s technology.

sgj2004

miaomiao1314

好东西，支持一下！谢谢

dqlxn2008

好东西，支持一下！谢谢版主分享！！

kanglei

谢搂主分享

aliaofly

thanks

top_dog

顶起来，呵呵

unique1985

顶起  谢谢楼主

zwd

感谢楼主

top_dog

听说这块在国内已经有好几个成功用户了。

chourhy

一般需要什么样的硬件啊

top_dog

普通台式机就可以求解30万网格的模型。
国外大多是用Linux Cluster来进一步并行加速计算的，并可以做更大的模型。

hfutbxq

学习一下，谢谢

yyw_wyy

下载学习