Implementation method applied to flexible line higher pair constraint simplification model

A technology that simplifies models and implementation methods, applied in the field of simulation, can solve the problems of many burrs in simulation results, poor calculation stability, low calculation efficiency, etc., and achieve the effects of smooth simulation results without burrs, reliable efficiency, and good stability

Inactive Publication Date: 2018-02-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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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

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  • Implementation method applied to flexible line higher pair constraint simplification model
  • Implementation method applied to flexible line higher pair constraint simplification model
  • Implementation method applied to flexible line higher pair constraint simplification model

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Embodiment Construction

[0034] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0035] The present invention provides an implementation method applied to a simplified model of high pair constraints of flexible lines. The technical solutions and application examples of the present invention are described in detail with reference to the accompanying drawings.

[0036] Taking the key parts in the vector nozzle mechanism as an example for analysis, the flexible member A in the present invention is the converging skeleton of the embodiment, and the roller is the A8 roller of the embodiment.

[0037] Considering that there is still a soft body contact between the ring and the convergent skeleton in the simplified model, and this group of contacts has more elements after the A8 ring has been flexed and the surface of the outer contour element is large, the calculation amount of the contact detection search is also relatively large. And it...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 王汉平张昊徐子豪王林鹏
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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