A Realization Method Applied to the Simplified Model of Flexible Line High Pair Constraint

Abstract

The invention discloses an implementation method applied to a flexible line higher pair constraint simplification model. The method includes: defining a workpiece with at least one arc face being a contact face as a flexible component A; subjecting a flexible component A and roller mutual contact model to constraint simplification to obtain a flexible line higher pair constraint model; defining aface, acting on a roller, of the flexible component A as an operating face of the flexible component A to construct a dynamic flexible line, and subjecting to further constraint processing; subjectingthe roller and flexible component A simplified model to loading processing; finally calculating a roller driving angle. By adoption of the method, defects of high mechanism contact quantity, poor calculation stability, difficulty in convergence, high simulation result burr quantity, low calculation efficiency and the like in axisymmetric vectoring exhaust nozzle many-body dynamics simulation canbe overcome.

Description

technical field [0001] The invention belongs to the field of simulation technology, and in particular relates to a realization method applied to a simplified model of flexible wire-to-height pair constraints. Background technique [0002] The axisymmetric thrust vectoring nozzle (AVEN) can realize vector propulsion in all directions and is easy to modify. It is widely used by fighter jets at present. Due to the large number of components (more than 800) and complex structure of the nozzle device, most of the constraints between the components are realized by contact. , which seriously challenges the deflection efficiency and reliability of the product. Restricted by calculation conditions, previous understanding of its performance largely relied on bench test tests, which made it difficult to fully obtain the load and dynamic characteristics of each link in the mechanism, and at the same time, the cycle was long, the cost was high, and the consumption of manpower and materi...

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Problems solved by technology

[0003] In view of this, the present invention provides an implementation method applied to the simplified model of flexible line-line-height pair constraints, which can be used to overcome the problems of many mechanism contacts, poor calculation stability, and convergence similar to the multi-body dynamics simulation of the axisymmetric vector nozzle. Difficult, and the simulation results have many burrs and low calculation efficiency.

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