To challenge for the transformation of the auto industry "CASE" ~ with wiring harness reliability evaluation and high-speed communication components design ~
CAE technology to predict break life
The auto industry is said to have welcomed once change period in one hundred.Confirm the trend of the keyword "CASE", by the Connected (Connected), the Autonomous driving (to be automatic), Shared&Services (sharing and service) and Electric (Electric) of the first letter of this a few word in English.As a comprehensive auto parts suppliers, sumitomo electric group around the "CASE" has carried out a variety of measures, the following will introduce as the main products of wiring harness and the connector is connected with the CAE analysis.
With wiring harness more used in automobile car, is a kind of transmission of energy and information, with similar functions to human neurological or vascular transmission system.One of its reliability evaluation has become a major issue.Until disconnection of wiring harness is one of the important factors to evaluate the reliability life.Frequent switch of the door of the movable parts of the harness are problematic, for that match the reliability evaluation of the wiring harness is a particularly important topic.Sumitomo electric group set out to break life prediction simulation in the 1990 s.Since then, research at Osaka minister shigeru shimada tree has been involved in CAE analysis.
"Car manufacturers around the year 2000 in more strict requirements on reliability is proposed.At the same time, the match between wire producers about CAE technology development in the increasingly competitive in bolt life prediction technology, sumitomo electric is much less than the other companies.Customer has strict is pointed out that the technology of sumitomo electric has 10 years behind.Under such a background, by the analysis of a merger of analytical research team and the CAE can be set up, and be responsible for the experiment and testing of sumitomo denso co., collaboration, embarked on the CAE development of higher precision.As a major turning point, analytical research established new CAE technique, for example by using X-ray CT visualization bare wire cable shape, internal injury and find out the cable bolt around the life of the factor and so on."(virtual)
Now, car makers customer thinks highly of CAE for sumitomo electric industries, praised its has reached the industry's top level.
Electric cars a huge trend will change with wiring harness
People attaches great importance to the reliability assessment with wiring harness, because it is directly related to security and reliability of auto.In other words, the market need "before reaching scrappage fixed number of year will never break this level of reliability.Sumitomo denso corporation development experiment of W/H reliability leader Tian Zhongyou ji said so.
"In recent years, new car development cycle is shortened.Which people to harness the durability of bolt is also becoming more demanding.As with wiring harness manufacturer, we can rework time has been more and more limited.Must, therefore, from the design stage began using CAE, through simulation way out the problem, this is one of our important functions.In addition, in the bidding process, some customers will ask to confirm the reliability through simulation technology.In the future, I hope in the propulsion simulation technology evolving at the same time, create talents, able to skillfully use the technology to build up a powerful CAE team."(field)
In Osaka research department in charge of CAE analysis of the village, working with a virtual, two of them develop with wire break line life prediction based on CAE technology, he said that the development trend of the CASE on the wire and also let with CAE ushered in the new situation.
"One of the elements of the CASE Electric (Electric) requires large current.Therefore, the cable will inevitably become coarse size.In the past, laying of cables used for the transmission of energy by the car consists of dozens of root bare wire, and adopted by the electric cable structure is more complex, some even are made up of thousands of root bare wire.We can determine where the damaged by simulating ways will lead to disconnection, at the same time it also established a proprietary technology, which helps to realize cable longevity of proprietary technology.Bare wire twisted way and the various modes of bending of the way also is closely related to performance and efficiency of the manufacturing process.Have limitations in physical experiment of the world, I hope that through CAE to achieve high reliability of the electric car with cable."(the village)
The use of CAE analysis, development of high-speed communication connector
"CASE" in the Connected (Connected) is to point to, through the sensors in the vehicle condition and the surrounding roads all sorts of data, such as create multiple value "car" of the Internet.Inside the car of Internet information transmission is the wiring harness.The emphasis is on, with high speed communication and large capacity, circulation has become the high frequency signal.To realize the "Internet", it is necessary to transmit signal.To achieve this vision is car business headquarters of Internet development to promote the foot is straight.
"Will the car by wiring together the parts come with the connector.Under the condition of high frequency, it is in a very short time by using extremely short long electrical signals to communicate, but the connector can cause a lot of pressure, the signal attenuation due to factors such as reflection, leading to communication does not match.This requires a technical staff to design the shape of the connector, to ensure that the signal can smoothly through the.At this time will need to use CAE.Shape with CAD design, using the analytic software on the computer to read again the shape and set up the communication conditions, and then using CAE technique, one of the analytical object through the grid subdivision and calculated, and thus the best shape of the connector.This is to realize the interconnection of one of the means."(below)
Conducted by the "computing" is one of the topics below.Relatively short wavelengths in the CAE analysis, for the performance of high frequency, subdivision mesh size, so the resolution of the amount of computation and data are increasing year by year.In pushing computing technology development at the same time, people are looking at a new generation of CAE analysis and build corresponding system, such as equipment enhancement.
Above introduction of sumitomo electric group analytical technology of any move is just an example.Analytical research is analyzed and the analytical object is all all the products in the field of business.Excellent analytical technology can ensure the enterprise the competitive advantage.Moreover, ensure that the product has high reliability, contribute to improve manufacturing operations and, this is the sense of mission, sumitomo electric each researcher is their sense of mission to parsing technology continues to evolve.For mission and challenge!
