Application of an Effective SIMP Method with Filtering for Topology Optimization of Motorcycle Tubular Frame

2017 ◽  
Vol 11 (11) ◽  
pp. 836
Author(s):  
Michele Calì ◽  
Salvatore Massimo Oliveri
Keyword(s):  
Topology Optimization ◽  
Simp Method

Topology Optimization of Electric Vehicle Body in White Based on SIMP Method

2011 ◽  
Vol 308-310 ◽  
pp. 606-609 ◽  
Author(s):  
Shu Yang ◽  
Chang Qi ◽  
Ping Hu ◽  
Zhi Yong Wei ◽  
Ying Li Wang
Keyword(s):  
Topology Optimization ◽  
Geometric Constraints ◽  
Vehicle Body ◽  
Numerical Instability ◽  
Static Loads ◽  
Simp Method ◽  
Proposed Model ◽  
Body In White ◽  
Braking Process ◽  
Moment Load

Based on Solid Isotropic Microstructure with Penalization (SIMP) method, a mathematical model for topology optimization of EV is proposed, which has design objective as minimizing compliance, with volumetric and geometric constraints. To make results more engineering value, the BIW optimization of EV takes into account not only the static loads, but also the torsion load in turning and moment load in braking process of EV. A number of implementation aspects in solving the numerical instability problem generated in optimization process are discussed, including checkboard patterns and mesh-dependency. Topology optimization of EV body in white with geometry and volumetric constraints is conducted, showing effectiveness of the proposed model.

Topology Optimization Using the SIMP Method for Multiobjective Conductive Problems

2012 ◽  
Vol 61 (6) ◽  
pp. 439-470 ◽  
Author(s):  
Gilles Marck ◽  
Maroun Nemer ◽  
Jean-Luc Harion ◽  
Serge Russeil ◽  
Daniel Bougeard
Keyword(s):  
Topology Optimization ◽  
Simp Method

Topology Optimization of Flywheel Rotors Using SIMP Method: A Preliminary Study

2012 ◽  
Vol 579 ◽  
pp. 427-434 ◽  
Author(s):  
T.D. Tsai ◽  
C.C. Cheng
Keyword(s):  
Topology Optimization ◽  
Energy Storage ◽  
High Speed ◽  
Optimization Technique ◽  
Design Sensitivity ◽  
Topology Design ◽  
Energy Storage Devices ◽  
Simp Method ◽  
Preliminary Study ◽  
Rotor Stiffness

Flywheels are kinetic energy storage and retrieval devices as chemical batteries. However, the high charge and discharge rates, as well as the high cycling capability make flywheels attractive as compared to other energy storage devices. This research serves as a preliminary study that aims for developing a technique in designing a flywheel rotor based on the solid isotropic method with penalization (SIMP) method. Examples are presented to illustrate the optimum structural layouts obtained given various design objectives. For a static rotor, the objectives are maximizing the first torsional natural frequency, maximizing the moment of inertia and maximizing both of them, respectively. The problem is formulated using bound formulation and the method of moving asymptotes (MMA), a first-order optimization technique, was employed. Therefore the design sensitivity becomes a necessity. The so-called checkerboard problem in the topology optimization is avoided using the nodal design variable. Also, a threshold is used to reduce the numerical imperfection in each iteration. For the topology design of a rotating rotor, the centrifugal force induced in the high-speed rotation is considered. The objective is to maximize the rotor stiffness and is demonstrated in the last example. Results show clear topology layout of flywheel was obtained using proposed method.

Incremental method of Young modulus updating procedure in topology optimization

2012 ◽  
Vol 60 (2) ◽  
pp. 223-228
Author(s):  
R. Kutyłowski ◽  
B. Rasiak
Keyword(s):  
Topology Optimization ◽  
Variational Approach ◽  
Strain Energy ◽  
Young Modulus ◽  
Material Density ◽  
Numerical Examples ◽  
Simp Method ◽  
Incremental Method ◽  
Preceding Step ◽  
Updating Procedure

Abstract. This paper presents a new Young modulus updating procedure as an extension to the SIMP method used for topology optimization. In essence, the modified Young modulus updating procedure consists in taking into account in a given optimization step not only the material density from the preceding step, but also the increment in density in the two preceding steps. Thanks to this, it is possible to obtain a solution in cases in which the classic SIMP method failed. The variational approach was adopted and the structure’s strain energy was minimized under constraints imposed on body mass. FEM was used to solve numerical examples. The numerical analysis confirmed the effectiveness of the proposed method, particularly for structures with relatively long spans.

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