Simulation And Optimization Based On SiPESC Platform For Rigid-flexible Coupling System

With the development of modern mechanical systems, the traditional rigid multi-body dynamics analysis without the consideration of the component elastic deformation is difficult to meet the requirement of high speed and precision. However, the problem has been solved effectively by using the rigid-flexible coupling dynamics, finite element technology, and structure optimization technology based on the integrated optimization analysis system SiPESC.OPT.Firstly, in order to deal with the development requirements of precision and the lightweight design for mechanical products and consider the simulation of component deformation in the special case, a dynamics analysis of rigid-flexible coupling system is implemented by using the method of combining finite element analysis and multi-body dynamics, which the modal neutral file of flexible body can be generated by the finite element analysis software Nastran and it can be imported into the multi-body dynamic simulation software Adams for the modeling and simulation of rigid-flexible coupling multi-body mechanism.And then, the result data of co-simulation can be generated by different software tools which are driven by SiPESC JavaScript. Dynamic performance calculations can be compared between the rigid multi-body and the rigid-flexible coupling systems efficiently. With driven by JavaScript language based on the SiPESC integrated platform, the integration of numerical simulation and optimization can be achieved to improve the design for lightweight and performance of the industrial products and put forward an integrated solution for the rigid-flexible coupling system simulation and optimization, which using by the parametric modeling method of Patran and Adams, calling finite element analysis and multi-body dynamics softwares and combining the SiPESC.OPT integrated optimization analysis system.At last, the co-simulation and optimization method has been applied to several engineering optimization design examples successfully. Reasonable effective section can be designed by optimizing the reliability of rigid-flexible coupling mechanism that consists of two connecting rods; the driving function and material parameters of the revolving flexible cantilever with large deformation can be optimized; the reasonable parameters of the steering system model including the driving function, tie rod, steering column and steering shaft are optimized by using different optimization algorithms, and at the same time, the reliability and stability of rigid-flexible coupling system have been improved in the case of lightweight; finally, considering the solar wing locking up, the impact of inertia forces have been reduced by the optimization of the solar wing stiffened structure, which can cause the damage to the connection mechanism.