CN103678832A - Method for calculating composite stress of non-equal structure superposed valve plates of vehicle shock absorber - Google Patents
Method for calculating composite stress of non-equal structure superposed valve plates of vehicle shock absorber Download PDFInfo
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- CN103678832A CN103678832A CN201410000605.0A CN201410000605A CN103678832A CN 103678832 A CN103678832 A CN 103678832A CN 201410000605 A CN201410000605 A CN 201410000605A CN 103678832 A CN103678832 A CN 103678832A
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Abstract
The invention relates to a method for calculating the composite stress of non-equal structure superposed valve plates of a vehicle shock absorber and belongs to the technical field of the shock absorber. The method is characterized in that according to the inner radius, outer radius, thickness and number of the non-equal structure superposed valve plates, the outer radius unequal rate factor, the equivalent thickness, the equal thickness, and the thickness proportionality factor of each superposed valve plate are determined; according to structure parameters and material characteristic parameters, the composite stress factor of the non-equal structure superposed valve plates is calculated, so that the composite stress of each non-equal structure superposed valve plate at any radius under uniform pressure is calculated. Comparison with an ANSYS simulation verification result shows that the calculating method is correct, a reliable composite stress calculating method is provided to the detaching design and strength verification of the non-equal structure superposed valve plates of the vehicle shock absorber, the design level, the quality and the performance of the shock absorber can be improved, on the premise that characteristic design requirements are met, the design requirement on the stress strength of the valve plates is met, and the design and experiment cost and the production cost are reduced.
Description
Technical field
The present invention relates to hydraulic vibration damper used for vehicle, particularly the non-computing method that wait structure stack valve block compound stress of vehicle shock absorber.
Background technology
In order to meet vibration-damper characterist and valve block stress intensity; actual vehicle shock absorber often can adopt the non-structure stack valve block that waits of multi-disc; in, radius of circle equates the stack valve block that exradius does not wait; simultaneously; adopt the non-structure stack valve block that waits reasonable in design; can exempt from, with " gap limit packing ring ", therefore can reduce manufacturing cost, there is significant economic benefit and social benefit.To really realize non-fractionation design and the strength check that waits structure stack valve block of vehicle shock absorber, must solution wait by no means the compound stress computational problem of structure stack valve block.Although China is carrying out large quantity research and is obtaining breakthrough aspect vibration damper stack valve block Stress calculation, for example, once reciprocity structure stack valve block research of Shandong Technology Univ, and the computing method of the structure stack valve block compound stresses such as vibration damper have been provided, yet, the non-compound stress of structure stack valve block that waits is calculated, home and abroad but never provides easy, reliable computing method at present, mostly can only utilize ANSYS finite element emulation software, by setting up the non-entity simulation model that waits structure stack valve block, compound stress is carried out to numerical simulation calculating.Although utilize finite element emulation software can obtain value reliably, separate, because finite element emulation software can not provide calculating formula, therefore, can not meet the requirement of vehicle shock absorber and stack valve block modernization CAD des ign and strength checking.Along with the fast development of auto industry and improving constantly of travel speed, vibration damper and the design of stack valve block are had higher requirement, realize the modernization CAD design of vehicle shock absorber and the structure such as non-stack valve block, a kind of reliable non-computing method that wait structure stack valve block compound stress must be provided, thereby meet vibration damper and non-ly wait the superpose requirement of actual design, production and strength check of valve block of structure.
Summary of the invention
For the defect existing in above-mentioned prior art, technical matters to be solved by this invention is to provide the computing method of the structures such as a kind of easy, accurate, reliable vehicle shock absorber is non-stack valve block compound stress, and its calculation process as shown in Figure 1.
In order to solve the problems of the technologies described above, the computing method of the non-grade of vehicle shock absorber provided by the present invention structure stack valve block compound stress, as shown in Figure 2, its technical scheme implementation step is as follows for the mechanical model of non-valve block such as stack such as grade:
(1) determine each non-external radius diversity factor coefficient that waits structure stack valve block
η i :
According to the non-external radius that waits structure stack valve block of vehicle shock absorber
r b1,
r b2...,
r bn, wherein,
r b1>
r b2> ... >
r bn , the external radius diversity factor of definite valve block that respectively superposes
η i , that is:
(2) calculate each non-equivalent depth that waits structure stack valve block of vehicle shock absorber
h ie
:
According to each non-thickness that waits structure stack valve block of vehicle shock absorber
h 1,
h 2...,
h n , and the external radius diversity factor in step (1)
η i , calculate each non-equivalent depth that waits structure stack valve block
h ie
, that is:
h 1e=
h 1，
h 2e=
，
h 3e=
,…,
h ne
=
；
(3) calculate the non-equivalent thickness that waits structure stack valve block
h ewith thickness proportion coefficient
k hi :
According to the non-sheet number that waits structure stack valve block
n 1,
n 2...,
n n, and the equivalent depth of the valve block that respectively superposes in step (2)
h ie
, calculate the non-equivalent thickness that waits structure stack valve block of vehicle shock absorber
h ethickness proportion coefficient with each stack valve block
k hi , that is:
(4) the non-structure stack valve block meaning radius in office that waits of vehicle shock absorber
rthe compound stress coefficient at place
calculate:
According to the 1st non-interior radius of circle that waits structure stack valve block
r a, exradius
r b1, elastic modulus
eand Poisson ratio
μ, calculate the non-structure stack valve block meaning radius in office that waits of vehicle shock absorber
r(
r a≤
r≤
r b1) the compound stress coefficient located
, that is:
In formula,
,
;
Wherein, when
r=
r acompound stress coefficient
, be the non-structure stack valve block that waits at interior radius of circle
r athe maximum compound stress coefficient at place
, that is:
In formula,
,
;
(5) each non-structure stack valve block compound stress that waits of vehicle shock absorber
calculating:
According to the non-suffered pressure of structure stack valve block that waits of vehicle shock absorber
p, the equivalent thickness in step (3)
h ewith thickness proportion coefficient
, and the compound stress coefficient in step (4)
, to each non-structure stack valve block meaning radius in office that waits of vehicle shock absorber
rthe compound stress amount at place
calculate, that is:
Wherein, when
for interior radius of circle
r athe maximum compound stress coefficient at place
,
be non-stack valve block
maximum compound stress in inner circle radial position
.
The present invention has advantages of than prior art:
At present, to vehicle shock absorber is non-, wait the compound stress calculating of structure stack valve block never to provide easy, reliable computing method both at home and abroad, mostly can only utilize ANSYS finite element emulation software, by setting up the non-entity simulation model that waits structure stack valve block, compound stress is carried out to numerical simulation calculating, obtain approximate compound stress value, yet, because finite element emulation software can not provide calculating formula or computing method, therefore, can not meet the requirement of vehicle shock absorber and the structure such as non-stack valve block actual design and production and strength check.The present invention is for the non-computing method that wait structure stack valve block compound stress of vehicle shock absorber, first, and according to each non-inside radius that waits structure stack valve block
, external radius
, thickness
with sheet number
, determine the external radius rate coefficient such as or not the valve block that respectively superposes
, equivalent depth
h ie
, and calculate the equivalent thickness of the structure stack valve block such as non-
thickness proportion coefficient with each stack valve block
; Then, according to the structure and material characterisitic parameter of stack valve block, calculate the non-compound stress coefficient that waits structure stack valve block
; Subsequently, according to the non-pressure that waits structure stack valve block
p, compound stress coefficient
, equivalent thickness
and the thickness proportion coefficient of each structure stack valve block such as non-
, utilize
to each non-compound stress that waits structure stack valve block
calculate.By more known with ANSYS simulation result, the computing method of the non-grade of this vehicle shock absorber structure stack valve block compound stress are correct, for actual vehicle shock absorber is non-, wait the fractionation des ign and strength checking of structure stack valve block, the reliable non-computing method that wait structure stack valve block compound stress are provided.
In order to understand better the present invention, below in conjunction with accompanying drawing, be further described.
Fig. 1 is the non-computing method process flow diagram that waits structure stack valve block compound stress of vehicle shock absorber;
Fig. 2 is the non-mechanical model that waits structure stack valve block of vehicle shock absorber;
Fig. 3 is the non-compound stress coefficient that waits structure stack valve block of the vehicle shock absorber of embodiment mono-
;
Fig. 4 is the non-compound stress that waits structure stack valve block of the vehicle shock absorber of embodiment mono-
curve;
Fig. 5 is the non-structure stack valve block compound stress emulation cloud atlas that waits of the vehicle shock absorber of embodiment mono-;
Fig. 6 is the non-compound stress that waits structure stack valve block of the vehicle shock absorber of embodiment bis-
curve;
Fig. 7 is the non-structure stack valve block compound stress emulation cloud atlas that waits of the vehicle shock absorber of embodiment bis-;
Fig. 8 is the non-compound stress that waits structure stack valve block of the vehicle shock absorber of embodiment tri-
curve;
Fig. 9 is the non-structure stack valve block compound stress emulation cloud atlas that waits of the vehicle shock absorber of embodiment tri-;
Figure 10 is the non-compound stress coefficient that waits structure stack valve block of the vehicle shock absorber of embodiment tetra-
;
Figure 11 is the non-compound stress that waits structure stack valve block of the vehicle shock absorber of embodiment tetra-
curve;
Figure 12 is the non-structure stack valve block compound stress emulation cloud atlas that waits of the vehicle shock absorber of embodiment tetra-.
Specific embodiments
Below by embodiment, the present invention is described in further detail.
Embodiment mono-: the non-interior radius of circle that waits structure stack valve block of certain vehicle shock absorber
r a=5.0mm, elastic modulus
e=200GPa, Poisson ratio
μ=0.3, thickness, sheet number and the external radius of stack valve block are respectively
h 1=0.25mm,
n 1=1,
r b1=8.5mm;
h 2=0.20mm,
n 2=1,
r b2=7.0mm;
h 3=0.15mm,
n 3=1,
r b3=6.0mm; Valve block pressure
p=3.0MPa, calculates the non-compound stress that waits structure stack valve block of this vehicle shock absorber.
(1) determine each non-external radius diversity factor coefficient that waits structure stack valve block
η i :
According to the non-external radius that waits structure stack valve block of vehicle shock absorber
=8.5mm,
=7.0mm,
=6.0mm, the external radius diversity factor of definite valve block that respectively superposes
η i ,
η 1=0,
=0.4286，
=0.7143；
(2) calculate each non-equivalent depth that waits structure stack valve block
h ie
:
According to each non-thickness that waits structure stack valve block of vehicle shock absorber
h 1=0.25mm,
h 2=0.20mm,
h 3=0.15mm,, and the external radius diversity factor in step (1)
η 1=0,
η 2=0.1286,
η 3=0.7143, calculate respectively each non-equivalent depth that waits structure stack valve block
h ie
,
h 1e=0.25mm，
h 2e=
=0.19206mm，
h 3e=
=0.12227；
(3) calculate the non-equivalent thickness that waits structure stack valve block
h ewith thickness proportion coefficient
k hi :
According to non-equivalent depth and the sheet number that waits structure stack valve block of certain vehicle shock absorber
h 1e=0.25mm,
n 1=1;
h 2e=0.19206mm,
n 2=1;
h 3e=0.12227mm,
n 3=1, calculate the non-equivalent thickness that waits structure stack valve block
h efor:
=0.29059mm；
Each non-thickness proportion coefficient that waits structure stack valve block
k hi be respectively;
(4) calculate the non-structure stack valve block meaning radius in office that waits
rcompound stress coefficient
:
According to the interior radius of circle of the 1st stack valve block
=5.0mm, exradius
=8.5mm, elastic modulus
e=2.0
and Poisson ratio
μ=0.3, calculate the non-structure stack valve block meaning radius in office that waits
r(
r a ≤ r≤r b1) compound stress coefficient
, that is:
In formula,
,
;
The compound stress coefficient calculating
with radius
r(
r a ≤ r≤r b1) change curve, as shown in Figure 3, wherein, at interior radius of circle
r athe maximum compound stress coefficient at place
=42.419mm
2;
(5) each non-structure stack valve block compound stress that waits of vehicle shock absorber
calculating:
According to the suffered pressure of stack valve block
p=3.0MPa, the equivalent thickness of the stack valve block in step (3)
h e=0.29059mm and thickness proportion coefficient
k h1
=0.8603,
k h2
=0.6609,
k h3
=0.4208, and the compound stress coefficient in step (4)
, to each non-structure stack valve block meaning radius in office that waits
rthe compound stress at place
calculate, that is:
Calculate resulting each non-compound stress that waits structure stack valve block
curve, as shown in Figure 4, wherein, each non-maximum compound stress of structure stack valve block that waits is respectively
1296.6MPa,
996.09MPa,
634.1MPa.
According to the non-interior radius of circle that waits structure stack valve block of vehicle shock absorber
r a=5.0mm, elastic model
e=200GPa, Poisson ratio
μ=0.3, and thickness, sheet number and the external radius of each structure stack valve block such as non-are respectively
h 1=0.25mm,
n 1=1,
r b1=8.5mm;
h 2=0.20mm,
n 2=1,
r b2=7.0mm;
h 3=0.15mm,
n 3=1,
r b3=6.0mm, utilizes ANSYS to set up stack valve block realistic model, and grid dividing unit is 0.1mm, is applying identical well-distributed pressure
pin=3.0MPa situation, the resulting stack valve block of emulation compound stress emulation cloud atlas, as shown in Figure 5.
As shown in Figure 5, at well-distributed pressure
punder=3.0MPa, the simulation value of the maximum compound stress of the non-grade of this vehicle shock absorber structure stack valve block is 1270MPa, match with utilizing the maximum compound stress 1296.6MPa of resulting the 1st stack valve block of these computing method, relative deviation is only 2.05%, shows that the computing method of the non-grade of the vehicle shock absorber structure stack valve block compound stress that the present invention sets up are reliable.
Embodiment bis-: the non-interior radius of circle that waits structure stack valve block of certain vehicle shock absorber
r a=5.0mm, elastic modulus
e=200GPa, Poisson ratio
μ=0.3, thickness, sheet number and the external radius of stack valve block are respectively
h 1=0.30mm,
n 1=1,
r b1=8.5mm;
h 2=0.20mm,
n 2=1,
r b2=7.0mm; The non-structure stack valve block pressure that waits
p=3.0MPa, calculates the non-compound stress that waits structure stack valve block of this vehicle shock absorber.
Step by embodiment mono-is calculated, that is:
(1) determine each non-external radius diversity factor coefficient that waits structure stack valve block
η i :
According to the non-external radius that waits structure stack valve block of vehicle shock absorber
=8.5mm,
=7.0mm, the external radius diversity factor of definite valve block that respectively superposes
η i , that is:
η 1=0,
=0.4286；
(2) calculate each non-equivalent depth that waits structure stack valve block
h ie
:
According to each non-thickness that waits structure stack valve block of vehicle shock absorber
=0.30mm,
=0.20mm, and the external radius diversity factor in step (1)
η 1=0,
η 2=0.4286, calculate respectively each non-equivalent depth that waits structure stack valve block
h ie
, that is:
h 1e=0.30mm，
h 2e=
=0.19312mm；
(3) calculate the non-equivalent thickness that waits structure stack valve block
h ewith thickness proportion coefficient
k hi :
According to non-equivalent depth and the sheet number that waits structure stack valve block of certain vehicle shock absorber
h 1e=0.30mm,
n 1=1;
h 2e=0.19312mm,
n 2=1, calculate the non-equivalent thickness that waits structure stack valve block
h efor:
Each non-thickness proportion coefficient that waits structure stack valve block
k hi be respectively;
(4) calculate the non-structure stack valve block meaning radius in office that waits
rcompound stress coefficient
:
Because the 1st non-structure, the material behavior of structure stack valve block of waiting is identical with embodiment's mono-, therefore, the non-structure stack valve block meaning radius in office that waits of this vehicle shock absorber
rcompound stress coefficient
, also identical with embodiment mono-, as shown in Figure 3;
(5) each non-structure stack valve block compound stress that waits of vehicle shock absorber
calculating:
According to the non-suffered pressure of structure stack valve block that waits of vehicle shock absorber
p=3.0MPa, the stack valve block equivalent thickness in step (3)
h ethe thickness proportion coefficient of the structure such as=0.3246mm and Ge Fei stack valve block
0.9242,
0.5949, and the compound stress coefficient in step (4)
, to each non-structure stack valve block meaning radius in office that waits
rthe compound stress at place
calculate, that is:
Calculate resulting each non-compound stress that waits structure stack valve block
curve, as shown in Figure 6, wherein, each non-maximum compound stress of structure stack valve block that waits is respectively
1116.2MPa,
718.55MPa.
According to the non-interior radius of circle that waits structure stack valve block of vehicle shock absorber
r a=5.0mm, elastic model
e=200GPa, Poisson ratio
μ=0.3, and thickness, sheet number and the external radius of each structure stack valve block such as non-are respectively
h 1=0.30mm,
n 1=1,
r b1=8.5mm;
h 2=0.20mm,
n 2=1,
r b2=7.0mm, utilizes ANSYS to set up stack valve block realistic model, and grid dividing unit is 0.1mm, is applying identical well-distributed pressure
pin=3.0MPa situation, the resulting stack valve block of emulation compound stress emulation cloud atlas, as shown in Figure 7.
As shown in Figure 7, at well-distributed pressure
punder=3.0MPa, the non-maximum compound stress of structure stack valve block that waits of this vehicle shock absorber
simulation value be 1110MPa, with utilize these computing method resulting the 1st stack valve block maximum compound stress
1116.2MPa matches, and relative deviation is only 0.56%, shows that the computing method of the non-grade of the vehicle shock absorber structure stack valve block compound stress that the present invention sets up are reliable.
Embodiment tri-: the non-interior radius of circle that waits structure stack valve block of certain vehicle shock absorber
r a=5.0mm, elastic modulus
e=200GPa, Poisson ratio
μ=0.3, thickness, sheet number and the external radius of stack valve block are respectively
h 1=0.2mm,
n 1=1,
r b1=8.5mm;
h 2=0.15mm,
n 2=1,
r b2=7.0mm; Stack valve block pressure
p=2.5MPa, calculates the non-compound stress that waits structure stack valve block of this vehicle shock absorber.
Step by embodiment mono-is calculated, that is:
(1) determine each non-external radius diversity factor coefficient that waits structure stack valve block
η i :
According to the non-external radius that waits structure stack valve block of vehicle shock absorber
=8.5mm,
=7.0mm, the external radius diversity factor of definite valve block that respectively superposes
η i ,
η 1=0,
η 2=
=0.4286；
(2) calculate each non-equivalent depth that waits structure stack valve block
h ie
:
According to each non-thickness that waits structure stack valve block of vehicle shock absorber
=0.20mm,
=0.15mm, and the external radius diversity factor in step (1)
η 1=0,
η 2=0.4286, calculate respectively each non-equivalent depth that waits structure stack valve block
h ie
,
h 1e=0.2mm，
h 2e=
=0. 14438mm；
(3) calculate the non-equivalent thickness that waits structure stack valve block
h ewith thickness proportion coefficient
k hi :
According to non-equivalent depth and the sheet number that waits structure stack valve block of certain vehicle shock absorber
h 1e=0.30mm,
n 1=1;
h 2e=0.19312mm,
n 2=1, calculate the non-equivalent thickness that waits structure stack valve block
h efor:
= 0.2224mm；
Each non-thickness proportion coefficient that waits structure stack valve block
k hi be respectively;
(4) calculate the non-structure stack valve block meaning radius in office that waits
rcompound stress coefficient
:
Because the 1st non-structure, the material behavior of structure stack valve block of waiting is identical with embodiment's mono-, therefore, the non-structure stack valve block meaning radius in office that waits of this vehicle shock absorber
rcompound stress coefficient
, also identical with embodiment mono-, as shown in Figure 3;
(5) each non-structure stack valve block compound stress that waits of vehicle shock absorber
calculating:
According to stack valve block pressure
p=2.5MPa, the stack valve block equivalent thickness in step (3)
h ethe thickness proportion coefficient of the structure such as=0.2224mm and Ge Fei stack valve block
k h1
=0.899,
k h2
=0.649, and in step (4) compound stress coefficient
, to each non-structure stack valve block meaning radius in office that waits
rthe compound stress at place
calculate, that is:
Calculate resulting each non-compound stress that waits structure stack valve block
curve, as shown in Figure 8, wherein, the non-structure stack valve block that waits is respectively at the maximum compound stress of inner circle radius
1926.5MPa,
1390.7MPa.
According to the non-interior radius of circle that waits structure stack valve block of vehicle shock absorber
r a=5.0mm, elastic model
e=200GPa, Poisson ratio
μ=0.3, and thickness, sheet number and the external radius of each structure stack valve block such as non-are respectively
h 1=0.20mm,
n 1=1,
r b1=8.5mm;
h 2=0.15mm,
n 2=1,
r b2=7.0mm, utilizes ANSYS to set up stack valve block realistic model, and grid dividing unit is 0.1mm, is applying identical well-distributed pressure
pin=2.5MPa situation, the resulting stack valve block of emulation compound stress emulation cloud atlas, as shown in Figure 9.
As shown in Figure 9, at well-distributed pressure
punder=2.5MPa, the simulation value of the maximum compound stress of the non-grade of this vehicle shock absorber structure stack valve block is 1870MP, match with utilizing the maximum compound stress 1926.5MPa of resulting the 1st stack valve block of these computing method, relative deviation is only 2.93%, shows that the computing method of the non-grade of the vehicle shock absorber structure stack valve block compound stress that the present invention sets up are reliable.
Embodiment tetra-: the non-interior radius of circle that waits structure stack valve block of certain vehicle shock absorber
r a=5.0mm, elastic modulus
e=200GPa, Poisson ratio
μ=0.3, thickness, sheet number and the external radius of stack valve block are respectively
h 1=0.25mm,
n 1=1,
r b1=10mm;
h 2=0.20mm,
n 2=2,
r b2=8.5mm;
h 3=0.15mm,
n 2=3,
r b2=7.0mm, the non-structure stack valve block pressure that waits
p=3.0MPa.
Step by embodiment mono-is calculated, that is:
(1) determine each non-external radius diversity factor coefficient that waits structure stack valve block
η i :
According to the non-external radius that waits structure stack valve block of vehicle shock absorber
r b1=10.0mm,
r b2=8.5mm,
r b3=7.0mm, the external radius diversity factor of definite valve block that respectively superposes
η i ,
η 1=0,
η 2=
=0.3，
η 3=
=0.6；
(2) calculate each non-equivalent depth that waits structure stack valve block
h ie
:
According to each non-thickness that waits structure stack valve block of vehicle shock absorber
h 1=0.25mm,
h 2=0.20mm,
h 3=0.15mm, and the external radius diversity factor in step (1)
η 1=0,
η 2=0.3,
η 3=0.6, calculate respectively each non-equivalent depth that waits structure stack valve block
h ie
,
h 1e=0.25mm，
h 2e=
=0.19728mm，
h 3e=
=0.13419；
(3) calculate the non-equivalent thickness that waits structure stack valve block
h ewith thickness proportion coefficient
k hi
According to non-equivalent depth and the sheet number that waits structure stack valve block of certain vehicle shock absorber
h 1e=0.25mm,
n 1=1;
h 2e=0.19728mm,
n 2=2;
h 3e=0.13419,
n 3=3, calculate the non-equivalent thickness that waits structure stack valve block
h efor:
=0.33688mm；
Each non-thickness proportion coefficient that waits structure stack valve block
k hi be respectively;
=0.7421，
=0.5856，
=0.3983；
(4) calculate the non-structure stack valve block meaning radius in office that waits
rcompound stress coefficient
:
According to the interior radius of circle of the 1st stack valve block
=5.0mm, exradius
=8.5mm, elastic modulus
e=2.0
and Poisson ratio
μ=0.3, calculate the non-structure stack valve block meaning radius in office that waits
r(
r a ≤ r≤r b1) compound stress coefficient
, that is:
In formula,
,
,
=200，
=
，
=0.01，
=5.0
，
=
，
＝-8.6734，
=2.6，
=
；
The compound stress coefficient calculating
with radius
r(
r a ≤ r≤r b1) change curve, as shown in figure 10, wherein, at interior radius of circle
r athe maximum compound stress coefficient at place
=92.563mm
2;
(5) each non-structure stack valve block compound stress that waits of vehicle shock absorber
calculating:
According to the suffered pressure of stack valve block
p=3.0MPa, the equivalent thickness of the stack valve block in step (3)
h e=0.29059mm and thickness proportion coefficient
k h1
=0.7421,
k h2
=0.5856,
k h3
=0.3983, and the compound stress coefficient in step (4)
, to each non-structure stack valve block meaning radius in office that waits
rthe compound stress at place
calculate, that is:
Calculate resulting each non-compound stress that waits structure stack valve block
curve, as shown in figure 11, wherein, each non-maximum compound stress of structure stack valve block that waits is respectively
1815.9MPa,
1432.9MPa,
974.72MPa.
According to the non-interior radius of circle that waits structure stack valve block of vehicle shock absorber
r a=5.0mm, elastic model
e=200GPa, Poisson ratio
μ=0.3, and thickness, sheet number and the external radius of each structure stack valve block such as non-are respectively
h 1=0.25mm,
n 1=1,
r b1=10mm;
h 2=0.20mm,
n 2=2,
r b2=8.5mm;
h 3=0.15mm,
n 2=3,
r b2=7.0mm, utilizes ANSYS to set up stack valve block realistic model, and grid dividing unit is 0.1mm, is applying identical well-distributed pressure
pin=3.0MPa situation, the resulting stack valve block of emulation compound stress emulation cloud atlas, as shown in figure 12.
As shown in Figure 12, at well-distributed pressure
punder=3.0MPa, the simulation value of the maximum compound stress of the non-grade of this vehicle shock absorber structure stack valve block is 1800MP, match with utilizing the maximum compound stress 1815.9MPa of resulting the 1st stack valve block of these computing method, relative deviation is only 0.88%, shows that the computing method of the non-grade of the vehicle shock absorber structure stack valve block compound stress that the present invention sets up are reliable.
Claims (1)
1. non-computing method that wait structure stack valve block compound stress of vehicle shock absorber, its concrete calculation procedure is as follows:
(1) determine each non-external radius diversity factor coefficient that waits structure stack valve block
η i :
According to the non-external radius that waits structure stack valve block of vehicle shock absorber
r b1,
r b2...,
r bn, wherein,
r b1>
r b2> ... >
r bn, the external radius diversity factor of definite valve block that respectively superposes
η i , that is:
(2) calculate each non-equivalent depth that waits structure stack valve block of vehicle shock absorber
h ie
:
According to each non-thickness that waits structure stack valve block of vehicle shock absorber
h 1,
h 2...,
h n , and the external radius diversity factor in step (1)
η i , calculate each non-equivalent depth that waits structure stack valve block
h ie
, that is:
h 1e=
h 1，
h 2e=
，
h 3e=
,…,
h ne
=
；
(3) calculate the non-equivalent thickness that waits structure stack valve block
h ewith thickness proportion coefficient
k hi :
According to the non-sheet number that waits structure stack valve block
n 1,
n 2...,
n n, and the equivalent depth of the valve block that respectively superposes in step (2)
h ie
, calculate the non-equivalent thickness that waits structure stack valve block of vehicle shock absorber
h ethickness proportion coefficient with each stack valve block
k hi , that is:
(4) the non-structure stack valve block meaning radius in office that waits of vehicle shock absorber
rthe compound stress coefficient at place
calculate:
According to the 1st non-interior radius of circle that waits structure stack valve block
r a, exradius
r b1, elastic modulus
eand Poisson ratio
μ, calculate the non-structure stack valve block meaning radius in office that waits of vehicle shock absorber
r(
r a≤
r≤
r b1) the compound stress coefficient located
, that is:
In formula,
,
;
Wherein, when
r=
r acompound stress coefficient
, be the non-structure stack valve block that waits at interior radius of circle
r athe maximum compound stress coefficient at place
, that is:
In formula,
,
;
；
(5) each non-structure stack valve block compound stress that waits of vehicle shock absorber
calculating:
According to the non-suffered pressure of structure stack valve block that waits of vehicle shock absorber
p, the equivalent thickness in step (3)
h ewith thickness proportion coefficient
, and the compound stress coefficient in step (4)
, to each non-structure stack valve block meaning radius in office that waits of vehicle shock absorber
rthe compound stress amount at place
calculate, that is:
Wherein, when
for interior radius of circle
r athe maximum compound stress coefficient at place
,
be non-stack valve block
maximum compound stress in inner circle radial position
.
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| CN105912785A (en) * | 2016-04-14 | 2016-08-31 | 周长城 | Method for calculating separate stresses of main and auxiliary springs of non-end contact and few-leaf diagonal type |
| CN109033708A (en) * | 2018-08-29 | 2018-12-18 | 华南理工大学 | A kind of Calculation of pressure loss method of series-parallel R formula vehicle shock absorber |
| CN109101748A (en) * | 2018-08-29 | 2018-12-28 | 华南理工大学 | A kind of Calculation of pressure loss method of parallel connection R formula vehicle shock absorber |
| CN109190240A (en) * | 2018-08-29 | 2019-01-11 | 华南理工大学 | A kind of and R formula vehicle shock absorber of connecting Calculation of pressure loss method |
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| US5769192A (en) * | 1993-05-10 | 1998-06-23 | Fichtel & Sachs Ag | Shock absorber having a piston permanently attached to its piston rod |
| CN103106349A (en) * | 2013-03-08 | 2013-05-15 | 山东理工大学 | Method for calculating radial stress of annular valve plate of vibration absorber |
| CN103106312A (en) * | 2013-03-08 | 2013-05-15 | 山东理工大学 | Calculation method for vibration absorber isodesmic annular superposed valve plate deformation |
| CN103150434A (en) * | 2013-03-08 | 2013-06-12 | 山东理工大学 | Method for calculating combined stress of annular valve sheet of shock absorber |
| CN103324824A (en) * | 2013-03-08 | 2013-09-25 | 山东理工大学 | Computing method for equivalent thickness of hydraulic buffer isomorphic annular sandwich valve plates |
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2014
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| US5769192A (en) * | 1993-05-10 | 1998-06-23 | Fichtel & Sachs Ag | Shock absorber having a piston permanently attached to its piston rod |
| CN103106349A (en) * | 2013-03-08 | 2013-05-15 | 山东理工大学 | Method for calculating radial stress of annular valve plate of vibration absorber |
| CN103106312A (en) * | 2013-03-08 | 2013-05-15 | 山东理工大学 | Calculation method for vibration absorber isodesmic annular superposed valve plate deformation |
| CN103150434A (en) * | 2013-03-08 | 2013-06-12 | 山东理工大学 | Method for calculating combined stress of annular valve sheet of shock absorber |
| CN103324824A (en) * | 2013-03-08 | 2013-09-25 | 山东理工大学 | Computing method for equivalent thickness of hydraulic buffer isomorphic annular sandwich valve plates |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105912785A (en) * | 2016-04-14 | 2016-08-31 | 周长城 | Method for calculating separate stresses of main and auxiliary springs of non-end contact and few-leaf diagonal type |
| CN109033708A (en) * | 2018-08-29 | 2018-12-18 | 华南理工大学 | A kind of Calculation of pressure loss method of series-parallel R formula vehicle shock absorber |
| CN109101748A (en) * | 2018-08-29 | 2018-12-28 | 华南理工大学 | A kind of Calculation of pressure loss method of parallel connection R formula vehicle shock absorber |
| CN109190240A (en) * | 2018-08-29 | 2019-01-11 | 华南理工大学 | A kind of and R formula vehicle shock absorber of connecting Calculation of pressure loss method |
| CN109101748B (en) * | 2018-08-29 | 2022-12-16 | 华南理工大学 | Pressure loss calculation method for parallel R-type automobile shock absorber |
| CN109033708B (en) * | 2018-08-29 | 2022-12-16 | 华南理工大学 | Pressure loss calculation method for series-parallel R type automobile shock absorber |
| CN109190240B (en) * | 2018-08-29 | 2022-12-16 | 华南理工大学 | Pressure loss calculation method for parallel-series R-type automobile shock absorber |
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