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[as880]

I'm reposting as it has been a few days and noone has been able to reach out in regards to my query. nHi guys so I want your advice upon setting up topology optimization.nProblem: set up TO in such a way that the output connects body 1 and body 3. i.e body 2 is my design inclusion region and 1 & 3 are my exclusion region. circular holes are fixed pins that hold the structure in place that i have modelled as fixed supports. 100Nm torque is applied through the big hole in the middle. All 3 bodies have shared topology and are of the same material.nDesired solution: the connecting structure of body 2 will deflect by around 5 deg (0.00307 rad)nMy thought process: I think that i can measure this deflection by setting up a new cylindrical coordinate system at the circumferential face of body 1 and the axis that goes around y axis lets say.nI will then measure this deflection by the rule THETA = L / R where R is the radius of body 1 from the centre point. and L will be the output direction deformation along the cylindrical axis (y axis)nThis then means i should set up a minimize compliance objective and set up a displacement constraint to get my 0.00307 rad deflection ( displacement i need = 0.00307 * R)nnnRoadblocks im facing:n1- Response constraint in ansys has displacement constraint only around nodal coordinate system, so is there any way that i can relate my cylindrical CS to this nodal CS? or an alternative way that i can achieve the same desired solution?n2- I want the result to be symmetrical around the circular space, so should i put a cyclic constraint (4 sections) or a symmetric constraint around multiple axes?n3- I also want the thickness of each strut that comes out of this result to be of the same thickness, so should i put an extrusion constraint as well?nArrayn

[Karthik Remella]

Hi @as880, nPlease refrain from creating duplicate posts on the forum. I see that we have provided a response to this question here.n

Hi guys so I want your advice upon setting up topology optimization.Problem: set up TO in such a way that the output connects body 1 and body 3. i.e body 2 is my design inclusion region and 1 & 3 are my exclusion region. circular holes are fixed pins that hold the structure in place that i have modelled as fixed supports. 100Nm torque is applied through the big hole in the middle. All 3 bodies have shared topology and are of the same material.Desired solution: the connecting structure of body 2 will deflect by around 5 deg (0.00307 rad)My thought process: I think that i can measure this deflection by setting up a new cylindrical coordinate system at the circumferential face of body 1 and the axis that goes around y axis lets say.I will then measure this deflection by the rule THETA = L / R where R is the radius of body 1 from the centre point. and L will be the output direction deformation along the cylindrical axis (y axis)This then means i should set up a minimize compliance objective and set up a displacement constraint to get my 0.00307 rad deflection ( displacement i need = 0.00307 * R)https://us.v-cdn.net/6032193/uploads/7HH9O7521SQE/screenshot-2021-02-09-143948.jpgRoadblocks im facing: 1- Response constraint in ansys has displacement constraint only around nodal coordinate system, so is there any way that i can relate my cylindrical CS to this nodal CS? or an alternative way that i can achieve the same desired solution?2- I want the result to be symmetrical around the circular space, so should i put a cyclic constraint (4 sections) or a symmetric constraint around multiple axes?3- I also want the thickness of each strut that comes out of this result to be of the same thickness, so should i put an extrusion constraint as well?https://us.v-cdn.net/6032193/uploads/ICCEZ3024OC7/draft1-archive-forum.wbpz/forum/discussion/24330/setting-up-topology-optimization-problem-to-achieve-displacement-in-cylindrical-coordinate-system

I'm closing this post now.nThank you.nKarthikn