This article research relying on the National Science Foundation Youth Fund" High-precision assembly strategy research of the large fragile objects - The fusion method based on visual and high-dimensional environmental constraints" and the major projects outsourcing project" The key technology research of digital assembly platform". Further research is made on the key technologies of the large optical components such as clamping, optimization analysis and so on. Based on the improved differential evolution algorithm and finite element method, a practical optimization clamping method is proposed, and the main contents are as follows: Firstly, the basic principles and analysis steps of the finite element method, widely used in the clamping optimization, is discussed, and the key technologies of applying the finite element analysis software ANSYS to the deformation optimization of the work-piece clamping are studied. Clamping Optimization of the contact processing is studied, and a spring is used to replace the contact between the work-piece and the clamping element, in order to speed up the optimization speed. Meanwhile, model with no thermal deformation under stress conditions is studied. Secondly, the basic principles of the classical differential evolution algorithm, the implementation steps as well as the strengths compared to other optimization methods are elaborated. Then, for the shortcomings of classical differential evolution algorithm, a adaptive population size differential evolution algorithm is proposed, which proved to be a good solution to the problem, such as slow convergence speed and prematurity, of the algorithm in the case of large populations. And it is applied to the actual research questions. Thirdly, the assembly process of the large optical components and the selection of the clamping scheme are introduced. Based on the optimization theory to minimize the work-piece deformation into the objective function, the optimization model of the research questions is established. On the basis of existing research, based on the combination of the improved differential evolution algorithm and finite element method, the clamping optimization method suitable for the clamping of the object of this paper is proposed. The effectiveness of the method is verified by experiments. Lastly, On the basis of further study of the method of secondary development of ANSYS, the development of a digital assembly simulation platform based on VC++ and ANSYS is ...
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