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《China Mechanical Engineering》 2016-17
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Topological Multi-objective Dynamics Optimization of Constrained Damping Structure Based on Evolutionary Structural Optimization

He Honglin;Tao Jie;Liu Yaodi;Ling Pu;Nanchang Hangkong University;  
Aimed to realize vibration reduction of damping structure,constrained damping plate vibration optimization was studied.From the constitutive relations of damping materials,the dynamics equation of constrained damping plate was deduced by principle of virtual work,modal loss factor mathematical calculation formula was deduced based on the energy dissipation.A modal was built,which took maximum the modal loss factor and minimum modal frequency changes as the objective function,damping materials consumption as constraint conditions,the modal loss factor and frequency sensitivity formula was deduced,normalized composite sensitivity formula was constructed.Evolutionary structural optimization was introduced to solve the topological optimization mathematical model,A program of damping structure topological optimization process was given in order to realize simulation calculation of damping plates.The simulations show that multi-objective of the evolutionary structural optimization may significantly improve the vibration reduction effectiveness of the damping material,guarantee the stability of frequency characteristics of the damping plates and greatly reduce the dosage of damping materials.The harmonic response analysis was carried out on the damping plates to verify the effectiveness of the optimization results.The optimization method may be widely used in the design of vibration reduction which have strict requirements in structure dynamics characteristics.
【Fund】: 国家自然科学基金资助项目(51265040);; 江西省自然科学基金资助项目(20122BA216027)
【CateGory Index】: TB535
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