CN-121997641-A - Finite element simplified simulation method for winding of steel wire rope of amplitude variation mechanism

Abstract

The invention discloses a finite element simplified simulation method for winding a steel wire rope of an amplitude variation mechanism, which is characterized by comprising the steps of constructing a modeling plane coordinate system defined by a pulley sleeve shaft, customizing and releasing the normal rotation freedom degree of an amplitude variation pulley and the axis rotation freedom degree of a guide pulley, establishing a rod unit force transmission chain simulation steel wire winding path formed by rigid unit nodes, innovatively adopting a dynamic coupling node position adjustment mechanism, solving the problem of equivalent transmission of multi-layer winding tension, and realizing the rapid adaptation of different pitching working conditions by combining the boom rotation with a modeling plane real-time updating technology. The method breaks through the accuracy limitation of the traditional empirical formula, reduces the overall modeling nodes, improves solving speed, reduces the tension output error of the steel wire rope, can directly generate the tension data of the working condition pedigree, and provides a reliable analysis basis for the design of the luvium of the large hoisting equipment.

Inventors

• SUN WENJIE
• ZHANG SHOUYUN
• LIU SHAOPENG
• WANG WEI
• WANG MIN
• FENG YUTING

Assignees

• 大连华锐重工集团股份有限公司

Dates

Publication Date

20260508

Application Date

20251230

Claims (6)

1. 1. A finite element simplified simulation method for winding a steel wire rope of an amplitude variation mechanism is characterized by comprising the following steps of: Establishing a finite element model of a main body steel structure of hoisting equipment, wherein the main body steel structure comprises a herringbone frame and an arm support, and the herringbone frame and the arm support main body are modeled by adopting a beam unit; Simulating a pulley shaft through a beam unit, wherein the pulley shaft is connected with a rigid unit positioned at the center of a shaft hole through a head node; determining a modeling plane based on a pulley sleeve shaft of an upper cross beam of the propeller strut and the head of the arm support; Simplifying the steel wire rope into two-force rod unit simulation, and simplifying the pulley into rigid unit simulation; For the amplitude-variable pulley, releasing the normal rotation freedom degree of the modeling plane through the coupling coincident node; For the guide pulley and the balance pulley, the rotation freedom degree of the axis of the pulley is released through the coupling coincident joint; connecting rigid unit nodes of the simulation pulley in sequence through rod units according to a wire rope winding path; And after the arm support is rotated to a target pitching angle, updating a local coordinate system of the modeling plane.
2. 2. A method of finite element simplified simulation of wire rope winding of an amplitude variation mechanism as claimed in claim 1, wherein: The local coordinate system updating operation of the modeling plane occurs after the pitching angle of the arm support is changed, and the origin of the coordinate system is fixed at the intersection point of the propeller strut and the pulley sleeve shaft of the arm support.
3. 3. A method of finite element simplified simulation of wire rope winding of an amplitude variation mechanism as claimed in claim 1, wherein: When the winding type of the steel wire rope is multi-layer winding, the total tension value output by the rod unit is equal to the total tension of the actual steel wire rope by moving the coupling node position of the pulley shaft.
4. 4. A method of finite element simplified simulation of wire rope winding of an amplitude variation mechanism as claimed in claim 1, wherein: The connection mode of the rod units meets the tensile force proportion relation of the pulley sleeves on the side of the propeller strut and the side of the arm support, wherein the tensile force proportion of the pulley sleeves on the inner side of the propeller strut to the pulley sleeves on the outer side of the propeller strut is 8:7, and the tensile force unit of the pulley sleeves on the head of the arm support is 8.
5. 5. A method of finite element simplified simulation of wire rope winding of an amplitude variation mechanism as claimed in claim 1, wherein: The connection point of the rigid unit and the lug plate is precisely positioned at the center of the shaft hole of the lug plate, and the length extension direction of the rigid unit is matched with the radius direction of the pulley.
6. 6. A method of finite element simplified simulation of wire rope winding of an amplitude variation mechanism as claimed in claim 1, wherein: under different pitching working conditions, the positions of the physical tangential points of the guide pulleys and the steel wire rope are only adjusted.

Description

Finite element simplified simulation method for winding of steel wire rope of amplitude variation mechanism Technical Field The technical field of engineering machinery data processing, in particular to a finite element simplified simulation method for winding a steel wire rope of an amplitude variation mechanism in a complex structure linear analysis process. Background The web mechanism is an important component of a complex-structured lifting device, the safety and reliability of which are directly related to the overall performance of the lifting device. At present, lifting equipment is continuously developed towards the directions of large scale and heavy load, and higher requirements are placed on the wire rope winding design of an amplitude variation mechanism. With the increasing development of simulation means, the finite element analysis method is widely applied to engineering analysis and calculation of hoisting equipment. In order to improve the calculation accuracy and efficiency, an overall modeling method is increasingly adopted. How to simplify the simulation of the variable-amplitude steel wire rope winding system, realize the transmission of the steel wire rope to the structural variable-amplitude force, and further complete the integral modeling of hoisting equipment is a problem to be solved currently. The studies on the steel wire rope of the amplitude variation mechanism in the prior literature mainly have the following defects: 1. mainly focuses on the winding design of the steel wire rope to solve the problem of mess rope or insufficient bearing capacity frequently occurring; 2. Regarding the model selection calculation of the steel wire rope, the traditional theory or the empirical formula is only used as the main principle, and the calculation error of the tension of the steel wire rope is larger; 3. There is currently no detailed finite element modeling method for the winding of the hoisting equipment luffing mechanism wire rope. Disclosure of Invention According to the technical problems, the prior art lacks an effective luffing wire rope winding finite element modeling method, the calculation error of the wire rope tension is large and complete machine modeling cannot be achieved, a physical equivalent modeling framework based on three-dimensional degree-of-freedom decoupling is provided, the normal rotation degree of freedom of a luffing pulley and the rotation degree of freedom of a guide pulley axis are released in a customized mode through constructing a modeling plane coordinate system defined by pulley sleeve shafts, a rigid transmission chain of a rod unit is established, and the positions of multiple layers of winding coupling nodes are dynamically adjusted to achieve the precise transmission of luffing force, the complete machine linearization efficient modeling and the simplified simulation method of real-time output of multi-working condition tension data. The invention adopts the following technical means: A finite element simplified simulation method for winding a steel wire rope of an amplitude variation mechanism, Establishing a finite element model of a main body steel structure of hoisting equipment, wherein the main body steel structure comprises a herringbone frame and an arm support, and the herringbone frame and the arm support main body are modeled by adopting a beam unit; Simulating a pulley shaft through a beam unit, wherein the pulley shaft is connected with a rigid unit positioned at the center of a shaft hole through a head node; determining a modeling plane based on a pulley sleeve shaft of an upper cross beam of the propeller strut and the head of the arm support; Simplifying the steel wire rope into two-force rod unit simulation, and simplifying the pulley into rigid unit simulation; For the amplitude-variable pulley, releasing the normal rotation freedom degree of the modeling plane through the coupling coincident node; For the guide pulley and the balance pulley, the rotation freedom degree of the axis of the pulley is released through the coupling coincident joint; connecting rigid unit nodes of the simulation pulley in sequence through rod units according to a wire rope winding path; And after the arm support is rotated to a target pitching angle, updating a local coordinate system of the modeling plane. Further, the local coordinate system updating operation of the modeling plane occurs after the pitching angle of the arm support is changed, and the origin of the coordinate system is fixed at the intersection point of the propeller strut and the pulley sleeve shaft of the arm support. Further, when the winding type of the steel wire rope is multi-layer winding, the total tension value output by the rod unit is equal to the total tension of the actual steel wire rope by moving the coupling node position of the pulley shaft. Further, the rod unit connection mode meets the tensile force proportion relation of the pulley sleeve on the side of the h