adina流体机械中的典型应用
案例1http://www.adina.com/hydr.gifAnalysis of Automotive Hydraulic Engine Mount Hydraulic engine mounts are used to reduce automotive engine vibration and noise. The performance of the hydraulic engine mount due to variations in the excitation frequency and amplitude is of interest to the designer. The above animation shows the results of the simulation. The engine excitation is modeled using a sinusoidal prescribed displacement acting on the aluminum block (at the top of the model). 案例2http://www.adina.com/10Hz.gifhttp://www.adina.com/400Hz.gif10 Hz excitation400 Hz excitation Fluid-Structure Interaction Simulation of a Hydromount
In this News, we present another FSI simulation performed using ADINA in the car industry. This time, the component simulated is the hydromount shown in Figure 1 below. The objective of the simulation was to evaluate the stiffness of the hydromount at different operating frequencies. The rubber part of the hydromount experiences large deformations and contact with the metal mounts and the plate. The fluid is viscous incompressible and described by the Arbitrary Lagrangian-Eulerian formulation. The direct monolithic solver is used in ADINA for this FSI solution due to the strong coupling between the solid and the fluid.
http://www.adina.com/Mount_Cad2.png http://www.adina.com/Mount_design2.png
Figure 1Hydromount
The hydromount was first subjected to a static pre-load, followed by different transient dynamic analyses at different excitation frequencies. The animations above show the maximum principal stress in the rubber, and the velocity in the fluid at two excitation frequencies, 10 Hz and 400 Hz (note that the animations are shown at the same speed). The stiffness of the hydromount for a wider range of frequencies (up to 1000 Hz) is shown in Figure 2.
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Figure 2Stiffness of the hydromount
This solution, like others presented in our earlier News and our Fluid-Structure Interaction web page, illustrates the wide range of fluid-structure interaction problems that can be solved with the ADINA System.
Keywords:
Fluid-structure interaction, hydromount, hydraulic engine mount, strongly coupled FSI, Arbitrary Lagrangian-Eulerian formulation, monolithic FSI solver
This problem was provided courtesy of Dr. Heck Consulting and Engineering, Germany.
案例3http://www.adina.com/try1.gif Analysis of Another Automotive Hydraulic Engine Mount
http://www.adina.com/try2.gif In the ADINA News Group Addendum, Analysis of Automotive Hydraulic Engine Mount (May 15, 2002), we presented an analysis of an automotive hydraulic engine mount. This time, we present a simulation of a hydraulic engine mount of another design. As in the previous analysis, a sinusoidal displacement is applied to the top of the engine mount. The figure above shows first the solid mesh (blue) followed by the fluid mesh (yellow), and after this an animation of the deformation of the mount. The pressure in the fluid is also depicted in the animation. The Z-(vertical) direction reaction-displacement curve is shown at right, demonstrating the phenomenon of hysteresis.
案例4
http://www.adina.com/particle4x.gif http://www.adina.com/mesh-solid.gif http://www.adina.com/mesh-fluid.gif
FSI Analysis of a Hydraulic Engine Mount The advanced fluid-structure interaction (FSI) analysis capabilities of ADINA are widely used in the automotive industry, and previous ADINA News features showcased many automotive applications. Among these, we presented two applications of ADINA in the analysis of automotive hydraulic engine mounts (HEMs) on August 14, 2002 and May 15, 2002. This time, we present a model of an HEM with a different design, solved by an ADINA user*. There are many details in this complex analysis, but the analysis is probably of interest to engineers working in the field of designing HEMs. The design features a spiral-curved inertia track (channel) connecting two fluid chambers, and a free decoupler. The free decoupler can be seen above in the mesh plot of the solid model. The inertia track is shown in the mesh plot of the fluid model, and can also be visualized with the help of the particle trace plot in the accompanying animation. The inertia track acts as a tuned damper that is designed to provide damping at low frequencies and large amplitudes. The free decoupler is usually a plastic plate. It dominates the interaction between the two fluid chambers for high frequencies and small amplitudes. The model was analyzed for its response to a sinusoidal excitation applied as shown in the mesh plot of the solid model. The results are illustrated in the above animation with particle traces inside the fluid chambers and the inertia track. The left figure below shows the time history of the transmitted force to the fixed part of the rubber spring, while the figure to the right shows the time history of the upper chamber pressure. The ADINA-FSI results agree very well with the experimental results. For more information on ADINA FSI, please refer to our page on fluid-structure interaction.
http://www.adina.com/fig1.gifhttp://www.adina.com/fig3.gif *courtesy W.-B. Shangguan and Z.-H. Lu, Experimental study and simulation of a hydraulic engine mount with fully coupled fluid structure interaction finite element analysis model, Computers & Structures 82(22) (2004) 1751-1771 (Department of Automotive Engineering, Tsinghua University, P. R. China). 很不错嘛，ADINA的FSI的却很强 很不错嘛，ADINA的FSI的却很强 驼鸟哥，上次你说要给大家展示您的ADINA应用实例，怎么还没有啊，期待中( ⊙ o ⊙ )啊！ 2# kevinheavens 有模型吗？贡献给大家看看。 作为流体机械这方面的新手，谢谢楼主了 再顶。。。。。
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