CN-121980684-A - Method for calculating displacement of inward bending type transverse stabilizer bar end

CN121980684ACN 121980684 ACN121980684 ACN 121980684ACN-121980684-A

Abstract

A calculation method for the displacement of an inward-bending type transverse stabilizer bar end belongs to the technical field of vehicle suspension design, and mainly comprises the steps of carrying out subsection analysis on half of a transverse stabilizer bar based on symmetry, calculating total deformation potential energy in the half of the transverse stabilizer bar when two end points of the transverse stabilizer bar are subjected to acting forces with equal magnitudes and opposite directions, calculating work done by the acting force based on displacement generated by the stressed end points of the half of the transverse stabilizer bar when the two end points of the transverse stabilizer bar are stressed, and obtaining the displacement generated by the stressed end points of the inward-bending type transverse stabilizer bar according to a functional principle. The method adopts a sectional analysis method, utilizes the theory that the work done by acting force is equal to the total deformation potential energy in the transverse stabilizer bar, calculates the displacement of the end point, and has the advantages of easy understanding of the calculation mode, simple and convenient solution, higher calculation precision and more accurate result.

Inventors

ZHANG YAXIN
WANG MINGMING
LI CUILIAN
LU GUOWEI

Assignees

吉客传动科技(苏州)有限公司

Dates

Publication Date: 20260505
Application Date: 20260121

Claims (5)

1. The method for calculating the displacement of the inward bending type transverse stabilizer bar end is characterized by comprising the following steps of: s1, arranging acting forces with equal magnitudes and opposite directions at two end points of a transverse stabilizer bar Based on symmetry of the stabilizer bar, the on-force is calculated Under the action, the total deformation potential energy stored in the half transverse stabilizer bar; S2, based on force Displacement of the end point of the transverse stabilizer bar under action Calculating force Work done; S3, according to the functional principle, i.e. the force obtained in step S2 The work is equal to the total deformation potential energy in the half stabilizer bar obtained in the step S1, and the force is obtained Under the action of the force-bearing end point of the inward-bending transverse stabilizer bar, the displacement is generated 。
2. The method according to claim 1, wherein in the step S1, the total deformation potential energy in the stabilizer bar is calculated segment by segment according to straight line segments constituting the stabilizer bar; The straight line section of the transverse stabilizer bar comprises a terminal end section, a plurality of connected bent arm sections and a straight arm section positioned in the middle in sequence, wherein the terminal end section and the straight arm section are mutually vertical, and the foot is hung inside the straight arm section; The straight arm section is divided into a l 0 section positioned between the centers of the two supports, a l 2 section positioned between the centers of the supports and the end points on the same side of the straight arm section, and a l 3 section positioned between the projection point of the end point of the transverse stabilizer bar on the straight arm section and the end points on the same side of the straight arm section; The total deformation potential energy in the half transverse stabilizer bar comprises bending potential energy of the final section, bending potential energy and torsion potential energy of each bent arm section, The bending potential energy of the segment is, The bending potential energy of the segment is, Bending potential in half of the segment, and torsion potential in half of the entire straight arm segment.
3. The method according to claim 2, wherein in the step S1, the method for calculating each segment potential energy includes: (1) Bending potential of the final segment : In the formula, The force acting on the end point of the stabilizer bar is J, the sectional moment of inertia of the transverse stabilizer bar is J, E is the elastic modulus of the material, and l 8 is the length of the final section; (2) The bending potential of each bent arm section is as follows: In the formula, For the length of the bent arm segment; A distance from the force at the end of the stabilizer bar to the point adjacent to the end of the bent arm segment; an angle between an additional couple vector direction generated by translating a force representing an end point of the stabilizer bar to the curved arm segment and the curved arm segment; the torsion potential energy is as follows: In the formula, Shear modulus of elasticity for the material; the polar moment of inertia of the cross section of the transverse stabilizer bar; (3) The bending potential of the segment is: In the formula, The distance between the projection point of the end point of the transverse stabilizer bar on the straight arm section and the end point of the same side of the straight arm section; (4) The bending potential of the segment is: Wherein l 2 is the distance between the center of the support and the endpoint of the same side of the straight arm section; (5) the bending potential in half of the segment is: Wherein l 0 is the center distance of the stabilizer bar support; (6) The torsion potential energy in half of the straight arm section is Wherein l T is the length of the straight arm section of the stabilizer bar, and l is the vertical distance from the end point of the stabilizer bar to the straight arm section of the stabilizer bar.
4. The method according to claim 2, wherein in step S2, the stabilizer bar end point displacement is changed from 0 to In the course of (a) force The work is W= In the formula, Is the linear stiffness of the stabilizer bar.
5. The method according to claim 4, wherein the step S3 specifically includes: According to the functional principle, can be obtained: Bending potential of the final segment+bending potential of each bent arm segment+twisting potential of each bent arm segment = Bending potential energy of segment + Bending potential energy of segment + Bending potential in half of the segment + twisting potential in half of the straight arm segment Obtaining the force after the term is shifted Displacement of rod end of inward-bending type transverse stabilizer rod under action Is a calculation formula of (2).

Description

Method for calculating displacement of inward bending type transverse stabilizer bar end Technical Field The invention relates to the technical field of vehicle suspension design, in particular to an inward bending type transverse stabilizer bar end displacement calculation method. Background For reasons of vehicle arrangement, the transverse stabilizer bar is often made into a relatively complex shape, in order to simplify calculation, when theoretical analysis is carried out on the transverse stabilizer bar, the transverse stabilizer bar is generally approximately considered to be an equal-arm trapezoid, displacement of an end point of the transverse stabilizer bar when a vehicle body is inclined can be conveniently calculated by means of an equal-arm trapezoid transverse stabilizer bar calculation formula, but if the complex inward bending transverse stabilizer bar is still calculated by adopting a standard equal-arm trapezoid stabilizer bar formula, the calculation accuracy is greatly reduced, so that the rigidity calculation result of the stabilizer bar is influenced, and design defects are easily caused. Disclosure of Invention Aiming at the inward bending type transverse stabilizer bar, the method disclosed by the invention is based on a material mechanics and theoretical mechanics method, and the sectional analysis method is adopted to accurately calculate the end point displacement of the transverse stabilizer bar, so that a reliable theoretical basis is provided for the rigidity calculation of the transverse stabilizer bar, and the precision of the axle design analysis is improved. The method for calculating the end point displacement of the inward bending type transverse stabilizer bar comprises the following steps: s1, arranging acting forces with equal magnitudes and opposite directions at two end points of a transverse stabilizer bar Based on symmetry of the stabilizer bar, the on-force is calculatedUnder the action, the total deformation potential energy stored in the half transverse stabilizer bar; S2, based on force Displacement of the end point of the transverse stabilizer bar under actionCalculating forceWork done; S3, according to the functional principle, i.e. the force obtained in step S2 The work is equal to the total deformation potential energy in the half stabilizer bar obtained in the step S1, and the force is obtainedUnder the action of the force-bearing end point of the inward-bending transverse stabilizer bar, the displacement is generated。 Further, in the step S1, the total deformation potential energy in the stabilizer bar is calculated segment by segment according to the straight line segments forming the stabilizer bar; The straight line section of the transverse stabilizer bar comprises a terminal end section, a plurality of connected bent arm sections and a straight arm section positioned in the middle in sequence, wherein the terminal end section and the straight arm section are mutually vertical, and the foot is hung inside the straight arm section; The straight arm section is divided into a l 0 section positioned between the centers of the two supports, a l 2 section positioned between the centers of the supports and the end points on the same side of the straight arm section, and a l 3 section positioned between the projection point of the end point of the transverse stabilizer bar on the straight arm section and the end points on the same side of the straight arm section; The total deformation potential energy in the half transverse stabilizer bar comprises bending potential energy of the final section, bending potential energy and torsion potential energy of each bent arm section, The bending potential energy of the segment is,The bending potential energy of the segment is,Bending potential in half of the segment, and torsion potential in half of the entire straight arm segment. Further, in the step S1, the method for calculating the potential energy of each segment includes: (1) Bending potential of the final segment : In the formula,The force acting on the end point of the stabilizer bar is J, the sectional moment of inertia of the transverse stabilizer bar is J, E is the elastic modulus of the material, and l 8 is the length of the final section; (2) The bending potential of each bent arm section is as follows: In the formula, For the length of the bent arm segment; A distance from the force at the end of the stabilizer bar to the point adjacent to the end of the bent arm segment; an angle between an additional couple vector direction generated by translating a force representing an end point of the stabilizer bar to the curved arm segment and the curved arm segment; the torsion potential energy is as follows: In the formula, Shear modulus of elasticity for the material; the polar moment of inertia of the cross section of the transverse stabilizer bar; (3) The bending potential of the segment is: In the formula, The distance between the projection point of the en