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Threaded connection critical transverse load accurate calculation method

A technology of lateral load and calculation method, which is applied in complex mathematical operations, design optimization/simulation, special data processing applications, etc., can solve the problems such as the anti-loosening performance of bolted connection structures that have not yet appeared, and achieve the effect of small calculation cost

Active Publication Date: 2020-08-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no evaluation model for anti-loosening performance of bolted connection structures based on the accurate calculation of critical lateral loads.

Method used

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  • Threaded connection critical transverse load accurate calculation method
  • Threaded connection critical transverse load accurate calculation method
  • Threaded connection critical transverse load accurate calculation method

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Experimental program
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Embodiment Construction

[0018] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0019] A method for accurately calculating the critical lateral load of a threaded connection, the steps are as follows:

[0020] Step a) Set the coarse interval of lateral load, the left end point F of the interval min Indicates the minimum value of the critical lateral load that may occur, and the right end point represents the maximum value of the critical lateral load that may occur F max ; Set the number of coarse interval segments n to discretize the interval, and the length of each small interval is

[0021] Step b) Calculate the angular acceleration value corresponding to the lateral load on the left end point of each small interval in the coarse interval, and record the lateral load and angular acceleration values ​​on all segment intervals. Typical results are as follows figure 1 Shown as the ...

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Abstract

The invention belongs to the technical field of bolt connection structure performance evaluation. The invention provides a threaded connection critical transverse load accurate calculation method. Thenumerical values of the end face torque, the thread torque and the pitch torque borne by the bolt are calculated to establish the relation between the load borne by the bolt and the rotation angle acceleration of the bolt, the change condition of the critical transverse load in a thick interval is obtained through calculation, then the accurate numerical value of the critical transverse load is obtained through function fitting, the anti-loosening performance of the bolt connection structure is evaluated, and reference is provided for bolt connection anti-loosening design. According to the method for accurately calculating the critical transverse load, the critical transverse load numerical value with high precision can be obtained through low calculation cost, and the anti-loosening performance of the bolt connection structure is quantitatively evaluated.

Description

technical field [0001] The invention belongs to the technical field of performance evaluation of bolted connection structures, and more specifically relates to a method for accurately calculating critical lateral loads of threaded connections. Background technique [0002] Complex equipment is often assembled from a large number of parts. Bolt connection is the most widely used assembly method because of its compact structure, simple assembly and easy disassembly. After the initial assembly stage, the bolt is subjected to three torque components: end face torque, thread torque and pitch torque. Among them, the pitch torque will cause the bolt to turn in the direction of loosening, causing the bolt to loosen, causing the loss of pretightening force, and finally causing failure. Torque and thread torque will resist the tendency of rotary loosening caused by pitch torque. [0003] Ideally, the sum of the end face torque and thread torque is equal to the pitch torque, the three...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/15G06F119/14
CPCG06F30/20G06F17/15G06F2119/14
Inventor 孙清超林清源赵勇张先连孙伟
Owner DALIAN UNIV OF TECH