Новые возможности расчетных модулей семейства CosmosWorks 2008
Основные усовершенствования коммерческих версий расчетных модулей семейства COSMOS версии 2008:
- Введены новые типы анализа:
- анализ сосудов давления (введена процедура линеаризации напряжений, предусмотренная нормативами при проектировании сосудов давления);
- линейная динамика (модальный анализ, гармонический анализ и расчет случайных колебаний);
- нелинейный динамический анализ;
- Расширена номенклатура виртуальных болтов;
- Введен дополнительный алгоритм генерации сетки с учетом кривизны.
- Возможно моделирование комбинированных систем, содержащих элементы балок, оболочек и пространственных тел;
- Введен алгоритм, позволяющий анализировать нечущую способность модель конструкций с отображением наиболее нагруженных областей;
- COSMOSMotion русифицирован как в части интерфейса, так и справочной системы. Исследование движения, физическое моделирование и COSMOSMotion функционируют в рамках единого интерфейса Motion Manager;
- Анимация движения в SolidWorks выполняется на базе Motion Manager;
- Объединены сопряжения SolidWorks и соединения COSMOSMotion.
- Включена возможность учитывать теплопроводность в пористых телах;
- Можно назначать солнечное излучение, зависящее от географического положения, времени и погоды;
- Присутствуют утилиты для создания крышек для внутренних задач, а также автоматического исправления контактов;
- Вентиляторы и тепловые источники могут включаться и выключаться в зависимости от значения цели;
- Проект сохраняется в файл модели.
Компания SolidWorks Russia приступила к тестированию расчетных модулей COSMOS 2008.
Подробнее о новых возможностях COSMOS 2008:
With the release of SolidWorks 2008 now rolled out to customers, Al Dean take a look at what’s in store for simulation users.
Every SolidWorks release is a pretty big undertaking – after all, that’s what software vendors do isn’t it – release more software (most profound – Ed). While the new user interface, the new direct interaction methodologies and other bright shiny things have clocked up the most column inches, there’s plenty of meat to sink your teeth into elsewhere in 2008 – so I’m going to take a quick look at what the simulation and analysis guys can sink their teeth into.
The Analysis Advisor prompts the user for important model information before providing expert suggestions on load/restraint options.
As most existing SolidWorks users will know the SolidWorks Office Premium offering now includes a good deal of analysis technology in the form of CosmosWorks Designer. This will be the focus of the review and then we’ll briefly look at what’s available in the other products.
A good place to start is with Connectors. These have seen consistent advances over the past few years, as the development team looks to create a series of features to be used within the analysis process that automate a lot of the set-up typically associated with the definition of complex analysis situations. The Bolt Connector is the perfect example. Rather than having to create a series of constraints which replicate the interaction between the bolt, fastener and material it interacts with, the Bolt Connector allows you to define it in a single operation, automatically determining the head/nut diameter for holes created using the Hole Series wizard.
CosmosWorks Designer can now analyse structural members in the chassis using more efficient beam elements.
For the 2008 release the Bolt Connector has been extended to allow you to connect more than two components (with a pass through and such) and it now supports countersunk bolts. Alongside this, the automation aspects improves so you can assign the bolt connector analysis feature to all ‘hole series’ bolts in a single click. Also on the subject of connectors, the Pin Connector has been worked to allow you to both include a pin weight and a mass value for that pin, so your model is more accurate when you’re performing frequency or buckling analyses.
Moving on, 2008 sees the ability to analyse structural members (framework etc) enhanced, to both follow the updates to the modelling tools and to extend what can be achieved. In In relation to the mirroring modelling updates, the tools now allow you to directly support curved, mirrored and patterned structural members. You can also now add loads/supports on faces in addition to joints and you can mix up your meshes to analyse both thick and thin parts with structural members which, for those working with frameworks combined with sheet metal and other engineering components, will be a major boost as all types of components can be simulated in a single study. Finally, you can now generate Shear force and bending moment diagrams as part of the reporting process.
The bonded contact has been improved to give better results for models with different mesh densities between bonded faces, especially important when using the h-adaptive method.
Moving away from updates to simulation technology, 2008 sees the introduction of a new learning tool, which is going to make it useful to both the new user and also the more experienced user looking for a refresher or to learn new tools. The Load/Restraint Advisor is one of those automated assistant tools that we all know and love, but thankfully it’s not presented in the form of an anthropomorphic tetrahedral element, but rather a discrete dialog that solves a variety of commonly encountered problems, such as “Whether to use support or load”, what type of load to use, or what contact represents part interaction.
There’s also been work done to assist with design optimisation and to help with getting a greater insight into the behaviour of your products. Using a simple slider, you can have the system cut away at your mesh to remove areas where loading concentrated from the display. Ansys introduced some technology some time ago that actually removed elements from a design based on the same factors and while it was an interesting exploration tool you would always have to remodel anyway, so this does much the same without that overhead. When you move that slider, you’ll gain an understanding of where material needs to remain and where material could potentially be removed. In these days of increasing material costs, this could be a really useful tool.
In CosmosFloWorks you can turn off a fan if the sensor temperature drops below a certain value.
If you’re looking to extend your use of simulation a little further, then there are upgrades available. CosmosWorks Professional builds on the Designer product and adds more design optimisation, thermal heat transfer, vibration, buckling, fatigue analysis and a wizard driven drop test tool. The CosmosWorks Advanced Professional module brings non-linear analysis, dynamic loading, and the behaviour of composite materials. These have moved on apace with this release, but what are the highlights? For the 2008 release cycle, CosmosWorks Professional sees the addition of Trend analysis tools which allow you to evaluate the “impact of successive design changes on base design by allowing the users to focus on relative results instead of absolute.” Essentially, you can provide the system with a range of design changes to make the system run the analyses. You can see how the variation in each run adds to the trend, so you can see where things are headed (for bad or good) Also, there are new tools to assist with stress linearisation according to the ASME pressure vessel code, combining multiple static study results to calculate stress due to dead load, live load, thermal load, seismic load and whatnot.
Fluid flow analysis
The Design Insight plot on an initial handle model is clearly suggesting that the I-beam cross-section and chamfered corners will yield an optimal design.
The SolidWorks 2008 release brought an interesting new addition to core SolidWorks in the form of CosmosFloXpress. This follows the concept of CosmosXpress which sees basic part analysis tools given away for free, but applied to the fluid flow. Essentially, it’s based on Flomerics technology (who develops the full CosmosFloWorks product) and is a wizard driven process that allows you to conduct a rudimentary fluid flow analysis of a part or assembly. Only a single inlet and outlet can be defined, the fluid can only be air or water and you can only view velocity effects of the flow using dynamic sections and surface plots. But as a dip of the toe into the waters of Fluid Flow analysis, it’s a good start. Of course, if you’ve looking to do some real work, then CosmosFloWorks is what you need.
Updates for this release include updates to the physical models available, including real gases, heat transfer in porous media and using a perforated plate as an opening. Alongside the physics updates, there’s been work done on automatic lid creation, healing of geometry and an extended engineering database that now includes fans (as used in electronics) and non-Newtonian fluids like blood, honey, pasta etc. Finally, multi-core processor support has been added and is available at no extra cost, unlike some other CFD codes.
CosmosWorks Designer allows users to plot the shear-force and bending diagrams for all or selected structural members.
The 3D market is maturing and personally speaking, I’m not convinced about the numbers of users still out there looking to move to 3D. The impression I have is that the vast majority of users have made their choice in 3D product development tools and are expanding in terms of adoption in the design office (to fully replace 2D processes). Whatever the truth of the matter is the facts are that many have adopted or begun to move to 3D-based design processes and are also looking to expand what they can do with that rich source of data. Simulation is the next logical next step. If you’re designing your products in 3D, then it makes sense to take that same data and use it to test that product in terms of its behaviour and function. Within the SolidWorks community, the obvious choice is of course, CosmosWorks.
This release sees the capabilities expanded in both the tools available within the SolidWorks Office Premium and the add-in, more advanced modules to make the system. For me, the Connectors concept is compelling, instead of redoing the same numerous steps time after time, it’s better to create a reusable formalised feature. I also love the Trend Analysis, Design Optimisation tools – these, used correctly, can give you amazingly rich information which can assist with ensuring your product can fulfil its requirements, but without over-engineering, and without waste. And, in these days of concentration of sustainability and all things green, that’s an incredible toolkit to have in your arsenal. CosmosWorks 2008 looks good and provides you with a full suite of tools that mean you can not only define your product in 3D, but also evaluate its performance and operational characteristics, all within the same environment, and make the most of connections between CAD, FEA and CFD. In short, it’s dammed cool.
By Al Dean.