Method for calculating peak value of stress concentration coefficient of pipe joint under out-of-plane bending moment load and application
A technology of stress concentration factor and calculation method, which is applied in calculation, computer-aided design, electrical digital data processing, etc., can solve the problem of lack of peak calculation formula and achieve the effect of a convenient and reliable method
Pending Publication Date: 2022-04-29
DALIAN UNIV OF TECH
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Problems solved by technology
There have been many recommended formulas for stress concentration factors of different types of pipe joints at home and abroad, but there is still a lack of calculation formulas for the peak value of stress concentration factors of three-plane Y-pipe joints under out-of-plane bending moment loads
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[0065] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0066] The embodiment of the present invention discloses a method for calculating the peak value of the stress concentration factor of a three-plane Y-shaped pipe joint under an out-of-plane bending moment load, which specifically includes the following steps:
[0067] The front view and top view of a typical three-plane Y-shaped pipe joint are as follows: figure 1 and figure 2 shown. In the figure, L c Calculate the length for the chord, L 1 is the length ...
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The invention discloses a method for calculating a peak value of a stress concentration coefficient of a pipe joint under an out-of-plane bending moment load and application, and relates to the technical field of fatigue safety evaluation of steel pipe structures of civil and ocean engineering. Therefore, accurate prediction of the stress concentration coefficient of the pipe node is an important basis for fatigue design. At present, a stress concentration coefficient calculation formula of a three-plane Y-shaped pipe node is lacked. In order to solve the problem, a three-plane Y-shaped pipe joint numerical model library with different geometric parameters is established, and a stress concentration coefficient peak value calculation formula for the three-plane Y-shaped pipe joint under the action of an out-of-plane bending moment load is provided through calculation and analysis. According to the formula, a spatial tube node stress concentration coefficient calculation system is perfected, and a convenient and reliable method is provided for carrying out three-plane Y-shaped tube node fatigue safety evaluation by adopting an S-N curve method based on hot spot stress.
Description
technical field [0001] The invention relates to the technical field of fatigue safety evaluation of steel pipe structures in civil engineering and ocean engineering, and more specifically relates to a method for calculating the peak value of the stress concentration factor of a pipe joint under an out-of-plane bending moment load and its application. Background technique [0002] The high strength-to-weight ratio makes steel one of the highest quality structural materials in civil engineering construction. Good material mechanical properties make steel pipe members widely used in various engineering structures, and the joints of steel pipe members are pipe joints. Pipe joints can be divided into two categories: planar pipe joints and space pipe joints. Plane pipe joints refer to pipe joints whose axes are all in the same plane, and pipe joints whose axes are not all in the same plane are space pipe joints. In the past ten years, with the wide application of steel pipe struc...
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IPC IPC(8): G06F30/17G06F30/20G06F119/04G06F119/14
CPCG06F30/17G06F30/20G06F2119/04G06F2119/14
Inventor 王文华李昕赵海盛
Owner DALIAN UNIV OF TECH