CN103258080B - A kind of Reliablility simulation method of micro-acceleration gauge - Google Patents
A kind of Reliablility simulation method of micro-acceleration gauge Download PDFInfo
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Abstract
The present invention relates to the Reliablility simulation technology of micro-acceleration gauge, specifically a kind of Reliablility simulation method of micro-acceleration gauge.The invention solves the problem that there is no a kind of micro-acceleration gauge Reliablility simulation method based on Highly Accelerated Life Test technology at present.A Reliablility simulation method for micro-acceleration gauge, the method adopts following steps to realize: 1) utilize ANSYS simulation software to set up the realistic model of micro-acceleration gauge; By the material behavior of simulation model validation micro-acceleration gauge; 2) under high temperature stress, Reliablility simulation is carried out to micro-acceleration gauge; 3) under high impact stresses, Reliablility simulation is carried out to micro-acceleration gauge; 4) under high temperature, HI high impact, High Rotation Speed combined stress, Reliablility simulation is carried out to micro-acceleration gauge.The present invention is applicable to the Reliablility simulation of various micro-acceleration gauge.
Description
Technical field
The present invention relates to the Reliablility simulation technology of micro-acceleration gauge, specifically a kind of Reliablility simulation method of micro-acceleration gauge.
Background technology
As an important branch of microelectromechanical systems (MEMS), micro-acceleration gauge has a wide range of applications in fields such as Aeronautics and Astronautics, automobile, national defence.The environment for use of micro-acceleration gauge is usually comparatively harsh, therefore in order to ensure the reliability in its use procedure, needs to carry out Reliablility simulation to it before use.Along with the system complexity of micro-acceleration gauge is more and more higher, traditional micro-acceleration gauge Reliablility simulation technology limit due to self principle, generally occurs the problem of the long and emulation high cost of simulation time.In recent years, a kind of emerging, widely accepted method for testing reliability---Highly Accelerated Life Test (HALT) technical development is rapid.The principle of this kind of technology is: apply a series of single stress (as multiaxis random vibration, temperature cycles, electric stress etc.) and combined stress to product in a stepwise manner, and progressively gain in strength until product failure, then root cause analysis is carried out to each inefficacy occurred, constantly carry out testing, analyze, verify and improving.Practice shows, this kind of technology is very effective to the latent defect of exposing product, the intensity improving product and reliability.Based on this, be necessary to invent a kind of micro-acceleration gauge Reliablility simulation method based on Highly Accelerated Life Test technology.But there is no a kind of so method at present.
Summary of the invention
The present invention there is no a kind of problem of the micro-acceleration gauge Reliablility simulation method based on Highly Accelerated Life Test technology at present in order to solve, provide a kind of Reliablility simulation method of micro-acceleration gauge.
The present invention adopts following technical scheme to realize: a kind of Reliablility simulation method of micro-acceleration gauge, and the method adopts following steps to realize: 1) utilize ANSYS simulation software to set up the realistic model of micro-acceleration gauge; By the material behavior of simulation model validation micro-acceleration gauge; According to the material behavior of micro-acceleration gauge, draw the maximum permissible stress [τ] of micro-acceleration gauge, allow range of strain, maximum yield strength [σ]; 2) under high temperature stress, Reliablility simulation is carried out to micro-acceleration gauge, concrete steps are as follows: 2.1) according to the serviceability temperature scope of micro-acceleration gauge, setting emulation heated the higher limit that testing temperature is less than serviceability temperature scope, set 5 DEG C≤temperature variation Δ T≤10 DEG C; 2.2) according to realistic model, the thermodynamic analysis module of ANSYS simulation software is utilized to apply temperature loading to micro-acceleration gauge; Temperature loading starts to increase by having heated testing temperature, often increases maximum temperature variation Δ Tmax and is set as a sub-step; After temperature loading increaseds to over the higher limit of serviceability temperature scope, then increase by two sub-steps; 2.3) load and solve temperature loading, checking solving result; According to the stress distribution cloud atlas in solving result, draw stress maximal value distributed points and the region of stress concentration of micro-acceleration gauge; Check last sub-step in solving result; Suppose that the maximum stress value now suffered by micro-acceleration gauge is τ
t; 2.4) if τ
t< [τ], shows that the function of micro-acceleration gauge is normal, then continue to increase temperature loading to micro-acceleration gauge, often increases maximum temperature variation Δ Tmax and is set as a sub-step; Repeat step 2.3), until τ
ttime > [τ], show the dysfunction of micro-acceleration gauge; Now check the previous sub-step in solving result, determine the minimum temperature load during dysfunction of micro-acceleration gauge; Continue to increase temperature loading to micro-acceleration gauge, often increase by 1 DEG C and be set as a sub-step; Repeat step 2.3), determine the upper breaking limit temperature of micro-acceleration gauge; 3) under high impact stresses, carry out Reliablility simulation to micro-acceleration gauge, concrete steps are as follows: 3.1) according to the use acceleration range of micro-acceleration gauge, and the initial impact acceleration of setting emulation is less than the higher limit using acceleration range; If the higher limit of the use acceleration range of micro-acceleration gauge is less than 100,000 g, then set 10,000 g≤impact acceleration variation delta a≤50,000 g; If the higher limit of the use acceleration range of micro-acceleration gauge is greater than 100,000 g, then set 50,000 g≤impact acceleration variation delta a≤100,000 g; Z-direction constraint is applied to the housing of micro-acceleration gauge; 3.2) according to realistic model, the static numerical simulation module of ANSYS simulation software is utilized to apply static impact acceleration load to micro-acceleration gauge; Static impact acceleration load increases by initial impact acceleration; 3.3) load and solve static impact acceleration load, checking solving result; According to the stress and strain cloud charts in solving result, draw the stress maximal value distributed points of micro-acceleration gauge, region of stress concentration and strain maximal value distributed points; Suppose that the maximum stress value now suffered by micro-acceleration gauge is τ
s; 3.4) if τ
s< [τ], shows that the function of micro-acceleration gauge is normal, then continues to increase static impact acceleration load to micro-acceleration gauge; Repeat step 3.3), until τ
stime > [τ], show the dysfunction of micro-acceleration gauge; Suppose that static impact acceleration load is now a1, suppose that the maximum strain value now suffered by micro-acceleration gauge is ε
s; If maximum strain value ε
sbe less than the permission range of strain of micro-acceleration gauge, then continue to increase static impact acceleration load to micro-acceleration gauge; Repeat step 3.3), until maximum strain value ε
sbe greater than the permission range of strain of micro-acceleration gauge; Suppose that static impact acceleration load is now a2; If a1>a2, then a2 is defined as the maximum impact acceleration that micro-acceleration gauge can bear; If a1 < is a2, then a1 is defined as the maximum impact acceleration that micro-acceleration gauge can bear; 3.5) X-direction or Y direction constraint are applied to the housing of micro-acceleration gauge; Repeat step 3.2)-3.4); If the maximum impact acceleration that when applying Z-direction constraint, micro-acceleration gauge can bear is greater than the maximum impact acceleration that when applying X-direction or Y direction constraint, micro-acceleration gauge can bear, show that the constraint condition that micro-acceleration gauge fault occurs gets Z-direction; If the maximum impact acceleration that when applying Z-direction constraint, micro-acceleration gauge can bear is less than the maximum impact acceleration that when applying X-direction or Y direction constraint, micro-acceleration gauge can bear, show that the constraint condition that micro-acceleration gauge fault occurs gets X-direction or Y direction; 3.6) Z-direction constraint is applied to the housing of micro-acceleration gauge; According to realistic model, the dynamics simulation module of ANSYS simulation software is utilized to apply impact acceleration load to micro-acceleration gauge; Impact acceleration load increases by initial impact acceleration, often increases impact acceleration variation delta a and is set as a sub-step; After impact acceleration load increaseds to over the higher limit using acceleration range, then increase by two sub-steps; Repeat step 3.3)-3.5); 4) under high temperature, HI high impact, High Rotation Speed combined stress, carry out Reliablility simulation to micro-acceleration gauge, concrete steps are as follows: 4.1) repeat step 2.1); Repeat step 3.1); According to the environment for use of micro-acceleration gauge, the initial revolution of setting emulation is 10000r/min, setting 100r/min≤revolution variation delta R≤500r/min; 4.2) according to realistic model, the thermodynamic analysis module of ANSYS simulation software is utilized to apply temperature loading to micro-acceleration gauge; Temperature loading starts to increase by having heated testing temperature; According to realistic model, the static numerical simulation module of ANSYS simulation software is utilized to apply static impact acceleration load to micro-acceleration gauge; Static impact acceleration load increases by initial impact acceleration; According to realistic model, revolution load is applied to micro-acceleration gauge; Revolution load increases by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; After revolution load increaseds to over the higher limit of serviceability temperature scope, then increase by two sub-steps; 4.3) load and solve revolution load, checking solving result; According to the stress and strain cloud charts in solving result, draw the stress maximal value distributed points of micro-acceleration gauge, region of stress concentration and strain maximal value distributed points; Suppose that the maximum concentrated stress value now suffered by micro-acceleration gauge is σ; 4.4) if σ is < [σ], show that the function of micro-acceleration gauge is normal, then continue to increase revolution load to micro-acceleration gauge; Repeat step 4.3), until time σ > [σ], show the dysfunction of micro-acceleration gauge; Now check the previous sub-step in solving result, determine the minimum revolution load during dysfunction of micro-acceleration gauge, the working limit revolution of micro-acceleration gauge corresponding under this minimum revolution load being defined as Current Temperatures load and current static impact acceleration load; 4.5) continue to increase static impact acceleration load to micro-acceleration gauge; Often increase impact acceleration variation delta a and be set as a sub-step; Revolution load is applied to micro-acceleration gauge; Revolution load increases again by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; Repeat step 4.3)-4.4), the working limit revolution of the micro-acceleration gauge that each static impact acceleration load is corresponding under determining Current Temperatures load; 4.6) continue to increase temperature loading to micro-acceleration gauge; Often increase maximum temperature variation Δ Tmax and be set as a sub-step; Static impact acceleration load is applied to micro-acceleration gauge; Static impact acceleration load increases again by initial impact acceleration, often increases impact acceleration variation delta a and is set as a sub-step; Revolution load is applied to micro-acceleration gauge; Revolution load increases again by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; Repeat step 4.3)-4.4), the working limit revolution of micro-acceleration gauge corresponding under determining each temperature loading and each static impact acceleration load combination in any.
The Reliablility simulation method of a kind of micro-acceleration gauge of the present invention takes into account high temperature, HI high impact, High Rotation Speed three kinds of stress to the impact of micro-acceleration gauge, and achieve based on Highly Accelerated Life Test technology Reliablility simulation is carried out to micro-acceleration gauge, thus effectively overcome the problem of the long and emulation high cost of traditional micro-acceleration gauge Reliablility simulation technology simulation time.
The present invention efficiently solves the problem that there is no a kind of micro-acceleration gauge Reliablility simulation method based on Highly Accelerated Life Test technology at present, is applicable to the Reliablility simulation of various micro-acceleration gauge.
Embodiment
A Reliablility simulation method for micro-acceleration gauge, the method adopts following steps to realize:
1) ANSYS simulation software is utilized to set up the realistic model of micro-acceleration gauge; By the material behavior of simulation model validation micro-acceleration gauge; According to the material behavior of micro-acceleration gauge, draw the maximum permissible stress [τ] of micro-acceleration gauge, allow range of strain, maximum yield strength [σ];
2) under high temperature stress, carry out Reliablility simulation to micro-acceleration gauge, concrete steps are as follows:
2.1) according to the serviceability temperature scope of micro-acceleration gauge, setting emulation heated the higher limit that testing temperature is less than serviceability temperature scope, set 5 DEG C≤temperature variation Δ T≤10 DEG C;
2.2) according to realistic model, the thermodynamic analysis module of ANSYS simulation software is utilized to apply temperature loading to micro-acceleration gauge; Temperature loading starts to increase by having heated testing temperature, often increases maximum temperature variation Δ Tmax and is set as a sub-step; After temperature loading increaseds to over the higher limit of serviceability temperature scope, then increase by two sub-steps;
2.3) load and solve temperature loading, checking solving result; According to the stress distribution cloud atlas in solving result, draw stress maximal value distributed points and the region of stress concentration of micro-acceleration gauge; Check last sub-step in solving result; Suppose that the maximum stress value now suffered by micro-acceleration gauge is τ
t;
2.4) if τ
t< [τ], shows that the function of micro-acceleration gauge is normal, then continue to increase temperature loading to micro-acceleration gauge, often increases maximum temperature variation Δ Tmax and is set as a sub-step; Repeat step 2.3), until τ
ttime > [τ], show the dysfunction of micro-acceleration gauge; Now check the previous sub-step in solving result, determine the minimum temperature load during dysfunction of micro-acceleration gauge; Continue to increase temperature loading to micro-acceleration gauge, often increase by 1 DEG C and be set as a sub-step; Repeat step 2.3), determine the upper breaking limit temperature of micro-acceleration gauge;
3) under high impact stresses, carry out Reliablility simulation to micro-acceleration gauge, concrete steps are as follows:
3.1) according to the use acceleration range of micro-acceleration gauge, the initial impact acceleration of setting emulation is less than the higher limit using acceleration range; If the higher limit of the use acceleration range of micro-acceleration gauge is less than 100,000 g, then set 10,000 g≤impact acceleration variation delta a≤50,000 g; If the higher limit of the use acceleration range of micro-acceleration gauge is greater than 100,000 g, then set 50,000 g≤impact acceleration variation delta a≤100,000 g; Z-direction constraint is applied to the housing of micro-acceleration gauge;
3.2) according to realistic model, the static numerical simulation module of ANSYS simulation software is utilized to apply static impact acceleration load to micro-acceleration gauge; Static impact acceleration load increases by initial impact acceleration;
3.3) load and solve static impact acceleration load, checking solving result; According to the stress and strain cloud charts in solving result, draw the stress maximal value distributed points of micro-acceleration gauge, region of stress concentration and strain maximal value distributed points; Suppose that the maximum stress value now suffered by micro-acceleration gauge is τ
s;
3.4) if τ
s< [τ], shows that the function of micro-acceleration gauge is normal, then continues to increase static impact acceleration load to micro-acceleration gauge; Repeat step 3.3), until τ
stime > [τ], show the dysfunction of micro-acceleration gauge; Suppose that static impact acceleration load is now a1, suppose that the maximum strain value now suffered by micro-acceleration gauge is ε
s; If maximum strain value ε
sbe less than the permission range of strain of micro-acceleration gauge, then continue to increase static impact acceleration load to micro-acceleration gauge; Repeat step 3.3), until maximum strain value ε
sbe greater than the permission range of strain of micro-acceleration gauge; Suppose that static impact acceleration load is now a2; If a1>a2, then a2 is defined as the maximum impact acceleration that micro-acceleration gauge can bear; If a1 < is a2, then a1 is defined as the maximum impact acceleration that micro-acceleration gauge can bear;
3.5) X-direction or Y direction constraint are applied to the housing of micro-acceleration gauge; Repeat step 3.2)-3.4); If the maximum impact acceleration that when applying Z-direction constraint, micro-acceleration gauge can bear is greater than the maximum impact acceleration that when applying X-direction or Y direction constraint, micro-acceleration gauge can bear, show that the constraint condition that micro-acceleration gauge fault occurs gets Z-direction; If the maximum impact acceleration that when applying Z-direction constraint, micro-acceleration gauge can bear is less than the maximum impact acceleration that when applying X-direction or Y direction constraint, micro-acceleration gauge can bear, show that the constraint condition that micro-acceleration gauge fault occurs gets X-direction or Y direction;
3.6) Z-direction constraint is applied to the housing of micro-acceleration gauge; According to realistic model, the dynamics simulation module of ANSYS simulation software is utilized to apply impact acceleration load to micro-acceleration gauge; Impact acceleration load increases by initial impact acceleration, often increases impact acceleration variation delta a and is set as a sub-step; After impact acceleration load increaseds to over the higher limit using acceleration range, then increase by two sub-steps; Repeat step 3.3)-3.5);
4) under high temperature, HI high impact, High Rotation Speed combined stress, carry out Reliablility simulation to micro-acceleration gauge, concrete steps are as follows:
4.1) step 2.1 is repeated); Repeat step 3.1); According to the environment for use of micro-acceleration gauge, the initial revolution of setting emulation is 10000r/min, setting 100r/min≤revolution variation delta R≤500r/min;
4.2) according to realistic model, the thermodynamic analysis module of ANSYS simulation software is utilized to apply temperature loading to micro-acceleration gauge; Temperature loading starts to increase by having heated testing temperature; According to realistic model, the static numerical simulation module of ANSYS simulation software is utilized to apply static impact acceleration load to micro-acceleration gauge; Static impact acceleration load increases by initial impact acceleration; According to realistic model, revolution load is applied to micro-acceleration gauge; Revolution load increases by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; After revolution load increaseds to over the higher limit of serviceability temperature scope, then increase by two sub-steps;
4.3) load and solve revolution load, checking solving result; According to the stress and strain cloud charts in solving result, draw the stress maximal value distributed points of micro-acceleration gauge, region of stress concentration and strain maximal value distributed points; Suppose that the maximum concentrated stress value now suffered by micro-acceleration gauge is σ;
4.4) if σ is < [σ], show that the function of micro-acceleration gauge is normal, then continue to increase revolution load to micro-acceleration gauge; Repeat step 4.3), until time σ > [σ], show the dysfunction of micro-acceleration gauge; Now check the previous sub-step in solving result, determine the minimum revolution load during dysfunction of micro-acceleration gauge, the working limit revolution of micro-acceleration gauge corresponding under this minimum revolution load being defined as Current Temperatures load and current static impact acceleration load;
4.5) continue to increase static impact acceleration load to micro-acceleration gauge; Often increase impact acceleration variation delta a and be set as a sub-step; Revolution load is applied to micro-acceleration gauge; Revolution load increases again by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; Repeat step 4.3)-4.4), the working limit revolution of the micro-acceleration gauge that each static impact acceleration load is corresponding under determining Current Temperatures load;
4.6) continue to increase temperature loading to micro-acceleration gauge; Often increase maximum temperature variation Δ Tmax and be set as a sub-step; Static impact acceleration load is applied to micro-acceleration gauge; Static impact acceleration load increases again by initial impact acceleration, often increases impact acceleration variation delta a and is set as a sub-step; Revolution load is applied to micro-acceleration gauge; Revolution load increases again by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; Repeat step 4.3)-4.4), the working limit revolution of micro-acceleration gauge corresponding under determining each temperature loading and each static impact acceleration load combination in any.
Claims (1)
1. a Reliablility simulation method for micro-acceleration gauge, is characterized in that: the method adopts following steps to realize:
1) ANSYS simulation software is utilized to set up the realistic model of micro-acceleration gauge; By the material behavior of simulation model validation micro-acceleration gauge; According to the material behavior of micro-acceleration gauge, draw the maximum permissible stress τ of micro-acceleration gauge, allow range of strain, maximum yield strength σ;
2) under high temperature stress, carry out Reliablility simulation to micro-acceleration gauge, concrete steps are as follows:
2.1) according to the serviceability temperature scope of micro-acceleration gauge, setting emulation heated the higher limit that testing temperature is less than serviceability temperature scope, set 5 DEG C≤temperature variation Δ T≤10 DEG C;
2.2) according to realistic model, the thermodynamic analysis module of ANSYS simulation software is utilized to apply temperature loading to micro-acceleration gauge; Temperature loading starts to increase by having heated testing temperature, often increases maximum temperature variation Δ Tmax and is set as a sub-step; After temperature loading increaseds to over the higher limit of serviceability temperature scope, then increase by two sub-steps;
2.3) load and solve temperature loading, checking solving result; According to the stress distribution cloud atlas in solving result, draw stress maximal value distributed points and the region of stress concentration of micro-acceleration gauge; Check last sub-step in solving result; Suppose that the maximum stress value now suffered by micro-acceleration gauge is τ
t;
2.4) if τ
t< τ, shows that the function of micro-acceleration gauge is normal, then continue to increase temperature loading to micro-acceleration gauge, often increases maximum temperature variation Δ Tmax and is set as a sub-step; Repeat step 2.3), until τ
tduring > τ, show the dysfunction of micro-acceleration gauge; Now check the previous sub-step in solving result, determine the minimum temperature load during dysfunction of micro-acceleration gauge; Continue to increase temperature loading to micro-acceleration gauge, often increase by 1 DEG C and be set as a sub-step; Repeat step 2.3), determine the upper breaking limit temperature of micro-acceleration gauge;
3) under high impact stresses, carry out Reliablility simulation to micro-acceleration gauge, concrete steps are as follows:
3.1) according to the use acceleration range of micro-acceleration gauge, the initial impact acceleration of setting emulation is less than the higher limit using acceleration range; If the higher limit of the use acceleration range of micro-acceleration gauge is less than 100,000 g, then set 10,000 g≤impact acceleration variation delta a≤50,000 g; If the higher limit of the use acceleration range of micro-acceleration gauge is greater than 100,000 g, then set 50,000 g≤impact acceleration variation delta a≤100,000 g; Z-direction constraint is applied to the housing of micro-acceleration gauge;
3.2) according to realistic model, the static numerical simulation module of ANSYS simulation software is utilized to apply static impact acceleration load to micro-acceleration gauge; Static impact acceleration load increases by initial impact acceleration;
3.3) load and solve static impact acceleration load, checking solving result; According to the stress and strain cloud charts in solving result, draw the stress maximal value distributed points of micro-acceleration gauge, region of stress concentration and strain maximal value distributed points; Suppose that the maximum stress value now suffered by micro-acceleration gauge is τ
s;
3.4) if τ
s< τ, shows that the function of micro-acceleration gauge is normal, then continues to increase static impact acceleration load to micro-acceleration gauge; Repeat step 3.3), until τ
sduring > τ, show the dysfunction of micro-acceleration gauge; Suppose that static impact acceleration load is now a1, suppose that the maximum strain value now suffered by micro-acceleration gauge is ε
s; If maximum strain value ε
sbe less than the permission range of strain of micro-acceleration gauge, then continue to increase static impact acceleration load to micro-acceleration gauge; Repeat step 3.3), until maximum strain value ε
sbe greater than the permission range of strain of micro-acceleration gauge; Suppose that static impact acceleration load is now a2; If a1>a2, then a2 is defined as the maximum impact acceleration that micro-acceleration gauge can bear; If a1 < is a2, then a1 is defined as the maximum impact acceleration that micro-acceleration gauge can bear;
3.5) X-direction or Y direction constraint are applied to the housing of micro-acceleration gauge; Repeat step 3.2)-3.4); If the maximum impact acceleration that when applying Z-direction constraint, micro-acceleration gauge can bear is greater than the maximum impact acceleration that when applying X-direction or Y direction constraint, micro-acceleration gauge can bear, show that the constraint condition that micro-acceleration gauge fault occurs gets Z-direction; If the maximum impact acceleration that when applying Z-direction constraint, micro-acceleration gauge can bear is less than the maximum impact acceleration that when applying X-direction or Y direction constraint, micro-acceleration gauge can bear, show that the constraint condition that micro-acceleration gauge fault occurs gets X-direction or Y direction;
3.6) Z-direction constraint is applied to the housing of micro-acceleration gauge; According to realistic model, the dynamics simulation module of ANSYS simulation software is utilized to apply impact acceleration load to micro-acceleration gauge; Impact acceleration load increases by initial impact acceleration, often increases impact acceleration variation delta a and is set as a sub-step; After impact acceleration load increaseds to over the higher limit using acceleration range, then increase by two sub-steps; Repeat step 3.3)-3.5);
4) under high temperature, HI high impact, High Rotation Speed combined stress, carry out Reliablility simulation to micro-acceleration gauge, concrete steps are as follows:
4.1) step 2.1 is repeated); Repeat step 3.1); According to the environment for use of micro-acceleration gauge, the initial revolution of setting emulation is 10000r/min, setting 100r/min≤revolution variation delta R≤500r/min;
4.2) according to realistic model, the thermodynamic analysis module of ANSYS simulation software is utilized to apply temperature loading to micro-acceleration gauge; Temperature loading starts to increase by having heated testing temperature; According to realistic model, the static numerical simulation module of ANSYS simulation software is utilized to apply static impact acceleration load to micro-acceleration gauge; Static impact acceleration load increases by initial impact acceleration; According to realistic model, revolution load is applied to micro-acceleration gauge; Revolution load increases by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; After revolution load increaseds to over the higher limit of serviceability temperature scope, then increase by two sub-steps;
4.3) load and solve revolution load, checking solving result; According to the stress and strain cloud charts in solving result, draw the stress maximal value distributed points of micro-acceleration gauge, region of stress concentration and strain maximal value distributed points; Suppose that the maximum concentrated stress value now suffered by micro-acceleration gauge is Σ;
4.4) if Σ < is σ, show that the function of micro-acceleration gauge is normal, then continue to increase revolution load to micro-acceleration gauge; Repeat step 4.3), until during Σ > σ, show the dysfunction of micro-acceleration gauge; Now check the previous sub-step in solving result, determine the minimum revolution load during dysfunction of micro-acceleration gauge, the working limit revolution of micro-acceleration gauge corresponding under this minimum revolution load being defined as Current Temperatures load and current static impact acceleration load;
4.5) continue to increase static impact acceleration load to micro-acceleration gauge; Often increase impact acceleration variation delta a and be set as a sub-step; Revolution load is applied to micro-acceleration gauge; Revolution load increases again by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; Repeat step 4.3)-4.4), the working limit revolution of the micro-acceleration gauge that each static impact acceleration load is corresponding under determining Current Temperatures load;
4.6) continue to increase temperature loading to micro-acceleration gauge; Often increase maximum temperature variation Δ Tmax and be set as a sub-step; Static impact acceleration load is applied to micro-acceleration gauge; Static impact acceleration load increases again by initial impact acceleration, often increases impact acceleration variation delta a and is set as a sub-step; Revolution load is applied to micro-acceleration gauge; Revolution load increases again by initial revolution, often increases maximum revolution variation delta Rmax and is set as a sub-step; Repeat step 4.3)-4.4), the working limit revolution of micro-acceleration gauge corresponding under determining each temperature loading and each static impact acceleration load combination in any.
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| CN111307178B (en) * | 2020-03-17 | 2022-02-15 | 中国科学院微小卫星创新研究院 | Degradation test method of passive high-power single machine for navigation |
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| 仿真基加速寿命试验优化设计方法研究;汪亚顺等;《宇航学报》;20060731;第27卷(第4期);第755-760页 * |
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