Analysis techniques for system reliability – Procedure for failure mode and effects analysis (FMEA) (IEC ); German version EN. IEC Failure modes and effects analysis (FMEA and FMECA) IEC 3rd Edition, August Complete Document. Failure modes and effects . Analysis techniques for system reliability – Procedure for failure mode and effects analysis (FMEA) (IEC ); German version EN
|Published (Last):||7 September 2010|
|PDF File Size:||17.89 Mb|
|ePub File Size:||10.69 Mb|
|Price:||Free* [*Free Regsitration Required]|
The loads can be determined either through measurements, through simulation or through a combination of both methods. The lifetime models also require the speed and load corresponding to each load alternation. Exemplary ABC analysis of mechanical drivetrain components [ 78 ]. In addition to that, methods for lifetime calculation of these elements are available which provide reliable lifetime predictions. Custom naming and coloring of Graph Areas In version 5. Road vehicles — Functional safety — Part There you can discuss with our experts all new features within a fully functioning and with many sample data staffed environment.
For these applications, quantitative reliability evaluation methods are necessary. This is visible, when the MEE module has been used. For the next step, the component models require the data in the form of load per load alternation so that a transformation is necessary. The loads on the output of the transmission are calculated by determining the necessary traction force to move the loaded dumper up the quarry and the empty dumper down the quarry.
Iec pdf free download – Google Docs
When operating in AHC mode, the drum and the shafts in the drivetrain do not always perform full revolutions so that a modified counting method is used. Requirements created in Usability Management Plan will be shown on this page as well Fig. Therefore, representative load cycles as well as precise component loads as a result of the load cycles are necessary for accurate lifetime evaluations of mobile machines.
This paper has 18 citations.
DIN EN 60812:2015-08
xin Through multibody simulations, all degrees of freedom can be considered in the load calculation. Challenges in load assumptions In steps four and five of the described method, a representative load cycle and the resulting component loads have to be determined. The following fourth segment is similar to the second one, where the empty dumper drives straight ahead, back to the quarry.
Even small defects can result in high costs for the operating company and delays due to repair time [ 34 ]. The module works similar to the MEE module.
Object Constraint Language Problem frames approach. To use this functionality a setting in program part “Administration” has to be set. This way, the advantages of both methods can be combined. They can be used together with MEE module. Purchase More information add to basket.
AFNOR Editions Online Store
For each task, a representative process pattern has to be defined. The additional Advanced Reporting module which allows free design of print editions offers for demanding users completely new design possibilities for the company-specific customization and expansion of all documents.
They are also stored as standard. To build a representative load cycle as the basis for determining the loads on the components, a deployment scenario dib to be created, including all possible tasks which the investigated machine can perform. Finally, the failure distributions are combined, taking into account the system reliability structure. The last step is the derivation of the overall system lifetime from the resulting system failure probability.
The components in category C are rarely subject to failure, so they usually do not need to be considered. Login to your personal dashboard for more detailed statistics on your publications. Over 21, IntechOpen readers like this topic Help us write another book on this subject and reach those readers Suggest a book topic Books open for submissions. This can be done using a suitable system theory. Since life expectancy of systems and its components strongly depends on the experienced load history, this information needs to be available as accurately as possible to allow reliable lifetime calculation results.
For the environmental influences in this example, a static oil temperature is assumed. In the following images the yellow area is defined as “Intermediate area”. Hazard analysis Risk assessment. Caution the offer 1 user is reserved for a single user, any broadcast even within his company is prohibited.
Furthermore, it is highlighted that the gears seem to be designed considerably more durable compared to the other components, according to the load capacity calculation in Ref. This group is only visible, when the module is used.
FMEA provides a systematic method for identifying all modes of failure, together with their causes and effects on the hardware, software or ddin, both locally and globally.
The loads on the machine can be transformed into a stress on each component. Failures occur when the component stress exceeds the components strength dln, which depends on the components design [ 6012 ].
The accuracy of the calculated lifetimes depends on the quality of the load assumptions, since the loads determine the damage of the components.
Embed this code snippet in the HTML of your website to show this chapter. From this movement, the required acceleration of the winch can be calculated.
We are IntechOpen, the world’s leading publisher of Open Access books. Auto Complete In version 4. Even for these types of vehicles, countless variants exist, for example, excavators, for which crawler undercarriages or wheeled types are common.