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Method and system for simulating contact friction nonlinear characteristics of tape connection structure

A technology of connecting structures and simulation methods, which is applied in the field of aerospace, can solve problems such as errors, influence on model calculation accuracy, and finite element simulation accuracy, and achieve the effects of improving calculation efficiency, accurate prediction, and reducing degrees of freedom

Active Publication Date: 2018-04-17
TSINGHUA UNIV
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Problems solved by technology

However, the axisymmetric approximation introduces errors into this model, affecting the computational accuracy of the model
In addition, due to factors such as processing and assembly errors, there are many uncertain parameters in the actual structure
These uncertain parameters will also affect the accuracy of finite element simulation
[0006] At present, there is no discussion on the error source of the finite element model of the tape and the research on improving the simulation accuracy of the nonlinear characteristics of the tape contact friction through model correction. It is impossible to directly use the uncorrected finite element model of the tape connection structure for engineering problem analysis. Accurately predict the mechanical properties of the tape-wrapped structure and the dynamics of the space-rocket coupling

Method used

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  • Method and system for simulating contact friction nonlinear characteristics of tape connection structure
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  • Method and system for simulating contact friction nonlinear characteristics of tape connection structure

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Embodiment Construction

[0032] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative impo...

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Abstract

The present invention proposes a method for simulating the non-linear characteristics of contact friction of a tape-wrapped connection structure, comprising the following steps: S1, establishing a three-dimensional finite element model of the basic sector of the tape-wrapped connection structure containing a single block; The element model is corrected to obtain the corrected parameters; S3, the two-dimensional finite element model is constructed according to the corrected parameters; S4, the two-dimensional finite element model is corrected, and the final two-dimensional axisymmetric finite element model is obtained to realize the simulation simulation. The invention adopts a two-step model correction method to ensure the accuracy of the two-dimensional nonlinear finite element model and the physical meaning of each parameter of the model, and realizes the rapid and accurate estimation of the nonlinear mechanical properties of the belt connection structure, and has higher calculation efficiency accuracy and efficiency. The invention also proposes a simulation system for the non-linear characteristic of contact friction of the tape connection structure.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a method and system for simulating the non-linear characteristics of contact and friction of a taped connection structure. Background technique [0002] Tape connection structure is currently the most widely used form of star-rocket connection structure in the aerospace field. A typical tape connection structure such as figure 1 As shown, it is mainly composed of metal belts, explosive bolts, clamping blocks, satellite docking frames and adapters and other components. Among them, the metal belt, the explosive bolt and the block are the connecting parts, and the satellite docking frame and the adapter are the connected parts. During assembly, by tightening the explosive bolts, a pre-tightening force is applied in the two metal strips, and then a radial pressure is generated on the discretely distributed clamping blocks on the inner side of the metal strips along the circumfer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T17/00
Inventor 秦朝烨褚福磊
Owner TSINGHUA UNIV
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