Implementation method applied to flexible line higher pair constraint simplification model

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 technical field of simulation, and in particular relates to an implementation method applied to a simplified model of a flexible line high pair constraint. Background technique [0002] The Axisymmetric Thrust Vectoring Nozzle (AVEN) can achieve vector propulsion in all directions and is easy to retrofit, and is currently widely used in fighter jets. Because the nozzle device has many components (more than 800), complex structure, and most of the constraints between the components are achieved by contact, it is a highly under-constrained complex mechanism, and it needs to withstand strong aerodynamic loads and high-temperature thermal loads during the working process. , which makes the deflection efficiency and reliability of the product seriously challenged. Restricted by the calculation conditions, the previous understanding of its performance largely relied on the bench test run, so it is difficult to fully obtain the l...

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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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