# Zizhe Wang

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1. ## Optiimization not successful

By the way. https://www.youtube.com/watch?v=mo2HdiJmxGc&t=431s This tutorial also shows how to optimize a rocker, and I think he didn't reduce the degree of freedom for rotation. So I'm little bit confused.
2. ## Optiimization not successful

One explanation: when the wishbone push the rocker (bell crank), the rocker will have a potential to rotate, that means it has the potential to push the spring damper and pull the anti-roll bar, so the spring damper and anti-roll bar will in turn apply forces to the rocker. I don't really know whether I should apply forces which from the spring damper and anti-roll bar on the rocker or simply only apply the force from wishbone. And also not really know which holes should be applied a Support. Thank you so much Zizhe
3. ## Optiimization not successful

Hi Felix, Is this the right result? Actually I don't really understand why my loadcase is a non-static loadcase. The force on the upper hole is the force from spring damper, the force on the right upper hole is the force from wishbone, and the force on the bottom hole is the force from anti-role bar. When the car moving, the rocker can rotate around the left bottom hole. I would be much appreciated if you could help me with my file. Thanks Zizhe
4. ## Optiimization not successful

Hi Felix Thanks for your quick answer! I need to explain my problems more specifically. The rocker should have the ability to rotate around one hole. I've watched some of your tutorials. And there is also one tutorial which optimized a rocker. http://solidthinking.com/training/2016/inspire/content/opti_setup/opti_setup_exercise.htm Based on this tutorial I think I should add a joint in that hole instead of a screw or a support. That's the reason why I added a joint before, the other forces are also added correctly. I'm optimizing two of my rockers, front and rear. I faced mainly 2 problems: 1. Front rocker, the analyse and optimization both are failed. It shows "Error 99" 2. Rear rocker, the analyse and optimization went well, but (a) the result with the optimization using maximum stiffness looks bad (picture shows the result) (b) after the analyse I got the factor of safety which is 0 (picture 2) (c) based on when I run optimization with minimum mass but the result shows always Design Violations (I tried factor of safety with 0.5, 1.2, 2.0) I've tried solving this problem for almost one week but still failed and I do really need some help Zizhe 01_Rocker Front.stmod 01_Rocker_Rear.stmod
5. ## Optiimization not successful

Hello! I have a rocker which should be optimized. I added force and joints, but no matter I try maximize stiffness or minimum mass (there is always "design violations" with the safety factor) the results are not so good. The picture shows how the rocker works. The .stmod file is also attached. Thank you very much! Best Regards 01_Rocker_FEM.stmod
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