CN103678805A - Actual effect simulated analysis method of low-voltage switch accessory vibration shock - Google Patents
Actual effect simulated analysis method of low-voltage switch accessory vibration shock Download PDFInfo
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- CN103678805A CN103678805A CN201310676666.4A CN201310676666A CN103678805A CN 103678805 A CN103678805 A CN 103678805A CN 201310676666 A CN201310676666 A CN 201310676666A CN 103678805 A CN103678805 A CN 103678805A
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Abstract
The invention discloses an actual effect simulated analysis method of a low-voltage switch accessory vibration shock. The method comprises the following steps of a) establishing a finite element model of a low-voltage switch accessory, b) analyzing the intensity and the distribution of the inside stress of the low-voltage switch accessory under the vibration shock, and c) optimizing the structure of the low-voltage switch accessory according to analysis results. According to the actual effect simulated analysis method of the low-voltage switch accessory vibration shock, the inside stress and the distribution of the stress can be obtained when an upper cover of a low-voltage switch is continuously subjected to impact loads, so that a basis is provided for structural optimization and design avoiding actual effect under the condition of vibration shock of the low-voltage switch accessory. The actual effect simulated analysis method of the low-voltage switch accessory vibration shock is high in applicability, can be applied to vibration shock failure analysis of low-voltage switch devices, and has important value to performance monitoring of the low-voltage switch.
Description
Technical field
The present invention relates to a kind of vibratory impulse actual effect simulating analysis, specifically, relate to a kind of low tension switch accessory vibratory impulse actual effect simulating analysis.
Background technology
Low tension switch is a kind ofly can connect or disconnect manually or automatically circuit according to extraneous signal and requirement, to realize the element of the switching of circuit or non-electric object, control, protection, detection, conversion and adjusting and equipment.In recent years, along with raising electrified, automatization level, low tension switch product is widely used in fields such as industrial automation, household electrical appliance, automobile, communications.Simultaneously, various low tension switches in electric system and low-voltage distribution system, have also been used, if breaking down, these low tension switches just cause electric system and low-voltage distribution system break down and cause power outage, the safety of entail dangers to supply line and consumer even, the economic loss that it causes will be more huge.According to standard GB/T 14048.5-2008 < < low voltage switch equipment and opertaing device the 5th part: the requirement of control circuit electrical equipment and on-off element > >, the break-make performance of low tension switch and life-span are not only the general performance of Design and machining of products technique, are also the important indicators of weighing low tension switch performance quality.Therefore the reliability consideration tool of, carrying out various low tension switches is of great significance.
The reasons such as vibratory impulse that low tension switch puts component aging into operation and is subject to surrounding environment due to improper use, for a long time in operational process all there will be fault, and failure mode is various.For example, when low tension switch is subject to vibratory impulse, can cause contact come off and cause loose contact; Because operating frequency is too high, make contact lasting vibration and cause the Fast Wearing of contact during the course; Because dynamic/static contact contact resistance is excessive or it is excessive to pass through electric current, cause that contact is overheated, when contact temperature surpasses permissible value, contact characteristic is degenerated, even produce melting welding etc.
Due to importance and himself the troublesome character of low tension switch in whole power industry, make test test and failure factor is analyzed and researched and seemed and be even more important of low tension switch.The test event of low tension switch mainly comprises general inspection, voltage drop mensuration, temperature rise test experiments, insulation resistance and voltage-withstand test, specified connection and capacity of decomposition test, short circuit making and breaking capacity test, KA Rms aptitude tests, acting characteristic test, life test, immunity to interference test etc.Foreign scholar mainly tends to the research to low tension switch field failure diagnostic system, domesticly aspect the research of low tension switch endurance testing device, making a few thing, simultaneously, domestic also have scholar being studied aspect low tension switch emulation technology, mainly comprises thermal process analysis, electromagnetic transient specificity analysis, mechanism action specificity analysis, switching arc analysis.Yet, in to the analysis of low tension switch function effect factor, also low tension switch accessory vibratory impulse actual effect is not carried out to the research of simulation analysis.
Summary of the invention
Consider that vibratory impulse is very large on the impact of low tension switch and accessory thereof, the object of the present invention is to provide a kind of low tension switch accessory vibratory impulse actual effect simulating analysis, by setting up the mathematical model of low tension switch accessory, the relation between research vibratory impulse and low tension switch accessory, thereby grasp the impact of vibratory impulse on low tension switch accessory performance, and then predict the performance of low tension switch accessory under the impact that environment externally and self internal vibration impact, for low tension switch accessory avoids actual effect to carry out structure optimization and design provides foundation in vibratory impulse situation.
For achieving the above object, the technical solution used in the present invention is as follows:
A low tension switch accessory vibratory impulse actual effect simulating analysis, comprises the steps:
A) set up the finite element model of low tension switch accessory;
B) analyze internal stress size and the distribution of low tension switch accessory under vibratory impulse;
C), according to analysis result, the structure of low tension switch accessory is optimized.
As a kind of preferred version, step a) comprises following operation steps:
1. create the 3-D geometric model of low tension switch accessory and material properties is set and grid division unit type;
2. the 3-D geometric model creating is carried out to grid division;
3. to carrying out the model of grid division, impose restriction.
As further preferred version, 1. step arranges SOLID45 as grid division unit type.
As further preferred version, 2. step adopts freedom (free) grid division mode to carry out grid division.
As further preferred version, 3. step applies the boundary condition constraint of 6 degree of freedom to carrying out the model of grid division.
Low tension switch accessory described in the present invention comprises low tension switch upper cover.
As a kind of preferred version, the cross sectional shape of described low tension switch upper cover is L-type.
As further preferred version, described low tension switch upper cover adopts epoxy resin to make.
Compared with prior art, the present invention has following beneficial effect:
The present invention provides a kind of low tension switch accessory vibratory impulse actual effect simulating analysis first, by the inventive method, can access low tension switch upper cover is being subject under continuous impulsive force load, the stress that it is inner and distribution situation, thus in vibratory impulse situation, avoid actual effect to carry out structure optimization and design provides foundation for low tension switch accessory; Application of the present invention is strong, can be used for, in the vibratory impulse failure analysis of low tension switch components and parts, the performance monitoring of low tension switch being had to important value.
Accompanying drawing explanation
Fig. 1 is the structural representation of low tension switch accessory of the present invention.
In figure: 1, low tension switch upper cover.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is elaborated further:
As shown in Figure 1, low tension switch accessory of the present invention comprises low tension switch upper cover 1, and the cross sectional shape of described low tension switch upper cover 1 is L-type, adopts epoxy resin to make.
The present invention carries out the method for vibratory impulse actual effect simulation analysis to described low tension switch accessory, comprise the steps:
A) set up the finite element model of low tension switch accessory, comprise following operation steps:
1. create the 3-D geometric model of low tension switch accessory and material properties is set and grid division unit type;
2. the 3-D geometric model creating is carried out to grid division;
3. to carrying out the model of grid division, impose restriction;
B) analyze internal stress size and the distribution of low tension switch accessory under vibratory impulse;
C), according to analysis result, the structure of low tension switch accessory is optimized.
As a kind of preferred version, 1. step arranges SOLID45 as grid division unit type, and 2. step adopts freedom (free) grid division mode to carry out grid division, and 3. step applies the boundary condition constraint of 6 degree of freedom to carrying out the model of grid division.
Simulating analysis of the present invention can adopt Ansys software to realize; Described Ansys software is that merge structure, fluid, electric field, magnetic field, Analysis of The Acoustic Fields are in the large-scale general finite element analysis software of one, U.S. ANSYS by one of maximum in the world finite element analysis software company develops, it can with most CAD software interfaces, realize sharing and exchange of data, as Pro/Engineer, NASTRAN, Alogor, I-DEAS, AutoCAD etc., are one of senior CAE instruments in modern product design.
Embodiment
Adopt Ansys software to carry out vibratory impulse actual effect simulation analysis to low tension switch accessory of the present invention:
Step 1: the finite element model of setting up low tension switch accessory
1, create the 3-D geometric model of low tension switch accessory, and material properties and grid division unit type are set
The epoxide resin material parameter adopting is: density p=1.7 * 10
3kg/cm
3, yang type modulus E=10.2 * 10
3pa, Poisson ratio μ=0.42.
Mesolow switch fitting model meshes division unit type of the present invention adopts SOLID45.
2, the 3-D geometric model creating is carried out to grid division
Grid dividing mode has two kinds of free and map conventionally, select different modes will the result solving and computational accuracy be produced to conclusive impact, because the planform of mesolow switch fitting of the present invention is uncomplicated, the present invention adopts freedom (free) grid division mode to carry out grid division.
3, to carrying out the model of grid division, impose restriction
The present invention is respectively to applying the boundary condition constraint of 6 degree of freedom on whole of the bottom of L-type bracing frame.
Step 2: analyze internal stress size and the distribution of low tension switch accessory under vibratory impulse
First the integral body of low tension switch accessory is carried out to continuous impulsive force load, then by aftertreatment, check stress intensity and the distribution situation that low tension switch accessory inside produces, observe the stress limit whether it has surpassed respective material.
Internal stress distribution figure by described low tension switch accessory under vibratory impulse can learn: the upright position that is positioned at L-type upper cover all exists stress distribution to concentrate place.
Step 3: according to analysis result, the structure of low tension switch accessory is optimized
According to the analysis result of step 2, can learn: the upright position that is positioned at L lid all exist stress distribution to concentrate the stress value at place to distribute comparatively to concentrate and its stress value larger, but maximal value does not have the epoxy resin stress permissible value limit, but for preventing from producing fission herein, can set up in relevant position two gussets, to disperse concentrated stress.Had this analysis result, those skilled in the art has just had the design considerations of low tension switch accessory being carried out to structure optimization.
Finally be necessary to be pointed out that at this; above-mentioned explanation is only for being described in further detail technical scheme of the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art's foregoing according to the present invention is made and adjustment all belong to protection scope of the present invention.
Claims (8)
1. a low tension switch accessory vibratory impulse actual effect simulating analysis, is characterized in that, comprises the steps:
A) set up the finite element model of low tension switch accessory;
B) analyze internal stress size and the distribution of low tension switch accessory under vibratory impulse;
C), according to analysis result, the structure of low tension switch accessory is optimized.
2. low tension switch accessory vibratory impulse actual effect simulating analysis as claimed in claim 1, is characterized in that, step a) comprises following operation steps:
1. create the 3-D geometric model of low tension switch accessory and material properties is set and grid division unit type;
2. the 3-D geometric model creating is carried out to grid division;
3. to carrying out the model of grid division, impose restriction.
3. low tension switch accessory vibratory impulse actual effect simulating analysis as claimed in claim 2, is characterized in that: 1. step arranges SOLID45 as grid division unit type.
4. low tension switch accessory vibratory impulse actual effect simulating analysis as claimed in claim 2, is characterized in that: 2. step adopts free grid division mode to carry out grid division.
5. low tension switch accessory vibratory impulse actual effect simulating analysis as claimed in claim 2, is characterized in that: 3. step applies the boundary condition constraint of 6 degree of freedom to carrying out the model of grid division.
6. the low tension switch accessory vibratory impulse actual effect simulating analysis as described in any one in claim 1 to 5, is characterized in that: described low tension switch accessory comprises low tension switch upper cover.
7. low tension switch accessory vibratory impulse actual effect simulating analysis as claimed in claim 6, is characterized in that: the cross sectional shape of described low tension switch upper cover is L-type.
8. low tension switch accessory vibratory impulse actual effect simulating analysis as claimed in claim 6, is characterized in that: described low tension switch upper cover is made by epoxy resin.
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| CN201310676666.4A CN103678805A (en) | 2013-12-11 | 2013-12-11 | Actual effect simulated analysis method of low-voltage switch accessory vibration shock |
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| CN201310676666.4A CN103678805A (en) | 2013-12-11 | 2013-12-11 | Actual effect simulated analysis method of low-voltage switch accessory vibration shock |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105158417A (en) * | 2015-08-18 | 2015-12-16 | 中国空间技术研究院 | Structure analysis method for SiP (system in package) device |
| CN106682305A (en) * | 2016-12-26 | 2017-05-17 | 中国西电电气股份有限公司 | Method for reducing transient impact load of switch operating mechanism insulating pull rod |
| CN106959210A (en) * | 2017-03-22 | 2017-07-18 | 国网江苏省电力公司电力科学研究院 | A kind of division condition detection method and device for open isolating switch |
| CN107016191A (en) * | 2017-04-05 | 2017-08-04 | 上海工程技术大学 | A kind of method of simulation analysis low tension switch end cap vibratory impulse failure |
| CN107515985A (en) * | 2017-08-24 | 2017-12-26 | 上海工程技术大学 | A kind of mechanical analyzing method for low-voltage circuit breaker vibrational excitation failure |
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| CN103235864A (en) * | 2013-05-13 | 2013-08-07 | 上海工程技术大学 | Low voltage apparatus accessory vibration impact actual-effect simulation analyzing method |
| CN203259326U (en) * | 2013-05-13 | 2013-10-30 | 上海工程技术大学 | Low-voltage electric appliance fitting |
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| CN103235864A (en) * | 2013-05-13 | 2013-08-07 | 上海工程技术大学 | Low voltage apparatus accessory vibration impact actual-effect simulation analyzing method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158417A (en) * | 2015-08-18 | 2015-12-16 | 中国空间技术研究院 | Structure analysis method for SiP (system in package) device |
| CN105158417B (en) * | 2015-08-18 | 2017-03-15 | 中国空间技术研究院 | A kind of structure analysis method of system in package device |
| CN106682305A (en) * | 2016-12-26 | 2017-05-17 | 中国西电电气股份有限公司 | Method for reducing transient impact load of switch operating mechanism insulating pull rod |
| CN106682305B (en) * | 2016-12-26 | 2019-10-29 | 中国西电电气股份有限公司 | A method of reducing switch operation mechanism insulated pull rod transient impact load |
| CN106959210A (en) * | 2017-03-22 | 2017-07-18 | 国网江苏省电力公司电力科学研究院 | A kind of division condition detection method and device for open isolating switch |
| CN106959210B (en) * | 2017-03-22 | 2019-06-11 | 国网江苏省电力公司电力科学研究院 | A kind of division condition detection method and device for open isolating switch |
| CN107016191A (en) * | 2017-04-05 | 2017-08-04 | 上海工程技术大学 | A kind of method of simulation analysis low tension switch end cap vibratory impulse failure |
| CN107515985A (en) * | 2017-08-24 | 2017-12-26 | 上海工程技术大学 | A kind of mechanical analyzing method for low-voltage circuit breaker vibrational excitation failure |
| CN107515985B (en) * | 2017-08-24 | 2020-05-15 | 上海工程技术大学 | Mechanical analysis method for vibration excitation failure of low-voltage circuit breaker |
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Application publication date: 20140326 |