Gearbox design software software#

This enables an end-to-end workflow that is depicted in Figure 4: in Simcenter 3D Acoustics, the multi-body loads are transformed into the frequency domain and automatically mapped onto the vibro-acoustic model. Within the Simcenter 3D platform, the results from the transient multi-body simulation can be seamlessly used in the acoustic environment. This can be clearly seen in the typical sidebands shown in the waterfall diagram of Figure 3, which propagate from the gear contact to the bearing reaction forces.ДЇigure 3: Bearing forces frequency spectrum derived from run-up simulation for a two-stage transmission. Using the Simcenter 3D Motion solver, it is now possible to assess the effect of thin rims and holes on the gear force excitation. Some smaller amplitude peaks are present at higher harmonics of these same orders.ДЄs shown at the right bottom of Figure 3, the gears are designed with light-weighting holes. The graph, as expected, presents the two main meshing orders and their multiple corresponding meshing frequencies of the two gear stages. The results are postprocessed in the frequency domain to visualize the orders. Figure 3 shows the dynamic force response within one of the bearings. Over a simulation period of 20 seconds an output speed-range between RPM is simulated. The model is simulated in Simcenter 3D Motion with an input torque ramping up to 350Nm. This is demonstrated on a second example, a two-stage automotive transmission that has been created using the Transmission Builder. For example, the analytical method already enables gearbox design engineers to assess a number of effects ranging from the frequency content of the system dynamics response to the excitation coming from the gears or the effect of misalignment and microgeometry modifications. Depending on the type of analyses and precision needed, you can easily scale-up or scale-down the model complexity. The multi-body models can be automatically generated in Simcenter 3D Motion, and a range of methods is available to perform the analysis: standard, analytical (ISO + Cai), advanced empirical and advanced FE preprocessor, with increasing level of accuracy and calculation time. The work flow is shown in Figure 2.ДЇigure 2: Work flow: based on gear design specifications, engineers can employ the Transmission Builder to quickly and accurately define the transmission layout and generate the multi-body simulation model. This drastically speeds up the time of transmission model creation. It requires the user to enter a minimum amount of parameters to unambiguously define a transmission. The Transmission Builder requires less user expertise, while significantly boosting productivity in setting up the multi-body simulation model. ДЇigure 1: Transmission example: three-staged gearbox of a wind turbineThe user of the Transmission Builder maintains a thorough overview of the model structure and can perform detailed analyses through simulations in the Simcenter 3D Motion software, as part of the Simcenterв„ў portfolio from Siemens PLM Software. The gearbox technical data is available to the public. As an example, consider the 750 kW wind turbine gearbox from NREL shown in Figure 1, which is used as a speed increaser coupled with a generator. The Transmission Builder enables engineers to progress from initial design to accurate simulations in a matter of an hour. This vertical application revolutionizes the user experience in setting up the multi-body simulation model of the transmission while dramatically increasing the process productivity.

Gearbox design software software#

Siemens PLM Software has developed a new preprocessor for gearbox design engineering: the Simcenter 3D Motion Transmission Builder (Transmission Builder). Several days are typically needed for model preparation, and to then simulate the nonlinear dynamics to obtain system-level loads for noise, vibration and harshness (NVH), transient and durability performance analyses, and further optimize the design for these attributes. Gearbox design engineers are familiar with the tedious process of modeling and parameterizing the gearbox in a multi-body simulation environment.