Design method of suspension composite material spiral spring
A composite material and coil spring technology, used in springs, low internal friction springs, springs/shock absorbers, etc., can solve the problem of not considering the variety of layup angles, spring performance, free height, and installation height. Corner spring stability, spring maximum stroke and other issues, to achieve the effect of strong practicability and expanded range
Active Publication Date: 2020-12-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
In the above design method, the change of the spring performance caused by the diversity of layup angles is not considered, and the theory of its stiffness and strength prediction is only limited to ±45° layup; and the free height of the actual suspension coil spring, installation Height, helix angle, spring stability and spring maximum stroke and other issues
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Embodiment 1
[0040] In this embodiment, the design parameters of the suspension system are: axle load M z =629kg, unsprung mass M f =94kg, offset frequency n f =1.25Hz, bushing equivalent stiffness K e =0 and leverage ratio i=1.2863, target maximum compression load is 7120N, installation height H=240mm, number of spring support circles n z = 1.5 (the upper and lower ends are each 0.75). The spring structure is cylindrical in shape.
[0041] A design method for a suspension composite coil spring, the method comprising the following steps:
[0042] (1) Obtain the design parameters of the suspension system, and determine the initial basic parameters of the suspension composite coil spring according to the design parameters of the suspension system; specifically, according to the above-mentioned axle load M z , unsprung mass M f , offset frequency n f , bushing equivalent stiffness K e and the leverage ratio i, the stiffness K of the coil spring of the suspension composite material is ...
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Abstract
The invention relates to a design method of a suspension composite material spiral spring, and belongs to the technical field of vehicle suspensions. The method comprises the following steps of obtaining suspension system design parameters, and determining initial basic parameters of the suspension composite material spiral spring according to the suspension system design parameters; selecting a composite material single-layer plate serving as a spiral spring material, and determining mechanical property parameters of the composite material single-layer plate; setting a design variable and a value range of the composite material spiral spring; determining the design rigidity and the maximum axial compression force of the composite material spiral spring; setting a target, determining an optimized constraint condition, and performing multi-target optimization calculation; and checking a result obtained by calculation, and determining a value of a design variable. According to the method, the influence of various design variables on the structure of the spiral spring is fully considered, and a reliable design scheme can be quickly obtained.
Description
technical field [0001] The invention relates to a design method of a suspension composite coil spring, which belongs to the technical field of vehicle suspension. Background technique [0002] In the existing automobile suspension system, the coil spring is generally made of steel, and the torsional deformation of the spring wire is used to absorb energy. However, with the development of new energy vehicles, people's requirements for lightweight vehicles are gradually increasing. [0003] The mass of composite coil springs is much smaller than that of steel springs, and it has great potential in realizing the lightweight of automobiles. Composite material coil spring refers to the elastic element obtained by curling composite material single-layer plate or laminated plate into composite material rod, and then rolling the composite material rod into a spiral shape by a certain process, and then cured by impregnating resin, such as figure 1 shown. The composite material lami...
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IPC IPC(8): G06F30/15G06F30/17G06F30/27F16F1/02F16F1/06G06F111/06G06F113/26G06F119/14
CPCG06F30/15G06F30/17G06F30/27F16F1/021F16F1/06G06F2111/06G06F2113/26G06F2119/14F16F2238/026
Inventor 陈潇凯李超
Owner BEIJING INSTITUTE OF TECHNOLOGYGY