CN105548521A - Gravity field simulation device and method for open type magnetic gravity model test system - Google Patents
Gravity field simulation device and method for open type magnetic gravity model test system Download PDFInfo
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Abstract
The invention discloses a gravity field simulation device and a method of an open type magnetic gravity model test system, wherein the device comprises a uniform magnetic field coil group, a gradient magnetic field coil group, a magnetic conduction armor iron, a uniform magnetic field correction ring and a radial magnetic field correction coil group; the uniform magnetic field coil group consists of a main coil and a compensation coil group and is coaxially sleeved on the magnetic-conductive armor iron, the gradient magnetic field coil group consists of two identical gradient coils and is coaxially and symmetrically arranged close to an A transmitting end and a B transmitting end of the magnetic-conductive armor iron respectively, and the two uniform magnetic field correction rings are sleeved outside the A transmitting end and the B transmitting end respectively; the radial magnetic field correction coil group is in a circular structure formed by four saddle-shaped radial magnetic field correction coils and coaxially sleeved outside the test space. The invention effectively overcomes the technical problems of low strength of the simulated gravity field, large radial error and closed test space of the magnetic gravity model test device at the present stage, and greatly promotes the development of the magnetic gravity model test.
Description
Technical field
The present invention relates to the model test in Geotechnical Engineering field, particularly a kind of open type magnetic Gravity Models pilot system gravitational field simulation device and method thereof.
Background technology
A large amount of engineering practice and the research in Geotechnical Engineering field prove, for large-scale, Special Rock engineering problem, model test method is under the condition substantially meeting the principle of similitude, the spatial relationship of tectonic structure and engineering structure can be reacted more realistically, construction simulation process and impact thereof more accurately, test findings can give more intuitive sensation, makes that people is easier holds Geotechnical Engineering global feature, evolution trend and stability from the overall situation, thus makes and judging more accurately.
Model test method, from being developed so far, has become a kind of important means of research geotechnical engineering problems both at home and abroad.20th century five, sixties physical simulation techniques are mainly based on plane stress resemble simulation test, after entering the middle and later periods seventies and the eighties, occur that plane strain resemble simulation test frame, three-dimensional modelling test stand peace template die intends the resemble simulation test device of the various ways such as test stand.But, in Geotechnical Engineering, the distortion of Rock And Soil and structure is the result of power effect, the main source of this power is then the gravity stress of Rock And Soil, even in a lot of engineering, gravity becomes unique power source, and Typical physical model test is because its gravity stress level is lower than prototype, cannot truly reflect rock mechanical behavior.Therefore, the simulation of gravity field is key point and the difficult point of Geotechnical Engineering model test always, soaring simulated gravity field is accelerated from early stage employing aircraft, extensively adopt centrifuge modelling gravity field till now, all cannot realize gravity field on all four with true gravity field, especially in underground works subject field, deep, due to the singularity of engineering specifications and underground structure, there be limited evidence currently of carries out centrifugal model test, but select the mode of face force compensating to carry out Approximate Equivalent gravity field, its approximation is also difficult to pass judgment at present.
In order to capture this difficult problem of effective simulated gravity field, scholar was had to propose the imagination adopting electromagnetic force field simulated gravity field in recent years successively, and the Geotechnical Engineering magnetic Gravity Models test method tentatively established based on electromagnetic force field simulated gravity field, the gravity field that the method is simulated by electromagnetic force field is completely similar to true gravity field, possess static test space and experimentation cost far below centrifugal model test, therefore will be the important breakthrough of Geotechnical Engineering physical experiments development.But the research and development of magnetic Gravity Models test unit are in the starting stage at present, face an a series of basic difficult problem and be difficult to break through.On the one hand, existing magnetic Gravity Models test unit only can simulate the low-intensity gravity field of 0-3g, and the magnetic Gravity Models test unit based on conventional electromagnetic coil, permanent magnet cannot break through the technology barriers simulating strong gravity field.Such as, the magnetic Gravity Models test unit (referring to patent CN102213658) of SanXia University's research and development only can simulate 1.06g gravity field, the magnetic Gravity Models test unit of China Mining University's research and development only can simulate 1.3g and 3.0g gravity field (referring to patent CN102841129 and CN103247208), this mode of coil that only adopts faces huge problem when simulating stronger gravity field, along with the increase of coil dimension, resistance and the heating of coil increase sharply, and bring huge challenge to power supply and magnet cooling.In addition on the one hand, the existing magnetic Gravity Models test unit based on conventional electromagnetic coil cannot break through the restriction of test space, the test space of such as, test unit in patent CN102213658 and CN103247208 is semi open model test space, creates great restriction to the physical experiments of being correlated with and surveying work.In addition, the magnetic field configuration that existing model test apparatus produces in test space all cannot meet magnetic Gravity Models test method to the requirement of magnetic field configuration, especially consider not enough in radial magnetic field intensity and gradient, its radial additional force produced is larger error to test findings band.Therefore, the simulation of high precision, high strength gravity field and the construction of open test space are the technical barrier that faces so far of magnetic gravity physical model test device field and challenge.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of open type magnetic Gravity Models pilot system gravitational field simulation device and method thereof, for solving the simulation high precision of current magnetic Gravity Models test unit field face, high strength gravity field and building the technical barrier of open test space.
Technical scheme: for realizing above technical purpose, the present invention will take following technical scheme:
Open type magnetic Gravity Models pilot system gravitational field simulation device, comprises uniform magnetic field coil groups, gradient magnetic field coil group, magnetic conduction armour iron, uniform magnetic field correcting ring and radial magnetic field correcting coil group;
Described uniform magnetic field coil groups is made up of main coil and compensating coil group, described compensating coil group is made up of A compensating coil, B compensating coil, C compensating coil and D compensating coil, and described main coil, A compensating coil, B compensating coil, C compensating coil and D compensating coil all have identical internal diameter;
Described main coil, A compensating coil, B compensating coil, C compensating coil and D compensating coil are by independent DC power supply, during energising, A compensating coil and B compensating coil and main coil have the identical current field in direction, and C compensating coil and D compensating coil have the current field contrary with main coil direction;
Described gradient magnetic field coil group is made up of A gradient magnetic field coil and B gradient magnetic field coil, A gradient magnetic field coil and B gradient magnetic field coil have identical interior diameter Dn, same external diameter Dw, identical height H and both coaxially fix, and there is gap between A gradient magnetic field coil and B gradient magnetic field coil
Described A gradient magnetic field coil and B gradient magnetic field coil are by independent DC power supply, and during energising, A gradient magnetic field coil and B gradient magnetic field coil have the current field that size is identical, direction is contrary;
Described magnetic conduction armour iron is made up of matrix and the transmitting terminal be arranged on matrix, described matrix is the xsect that a vertical long column and two the horizontal spreaders being arranged at vertical long column two ends are formed is circular " C " type magnetic conductor, and the end of the horizontal spreader of " C " type magnetic conductor opening part has the vertical short column arranged to opening inner side, described transmitting terminal comprises A transmitting terminal and B transmitting terminal, A transmitting terminal and the upper and lower coaxial-symmetrical of B transmitting terminal install and its clear distance is determined by Hf=Dt+2H, and H is the height of described A gradient magnetic field coil or B gradient magnetic field coil here;
Described C " type magnetic conductor is circular cross section and has the diameter identical with the interior diameter of main coil in shim coil set;
Main coil coaxial sleeve in described shim coil set is located on the vertical long column of " C " type magnetic conductor, A compensating coil and C compensating coil respectively coaxial sleeve are located on the horizontal spreader of " C " type magnetic conductor, and B compensating coil and D compensating coil respectively coaxial sleeve are located on the vertical short column of " C " type magnetic conductor opening part;
Described A gradient magnetic field coil and B gradient magnetic field coil coaxial-symmetrical are arranged in the A transmitting terminal of magnetic conduction armour iron and the gap of B transmitting terminal centre, and A gradient magnetic field coil next-door neighbour A transmitting terminal, B gradient magnetic field coil next-door neighbour B transmitting terminal;
Described uniform magnetic field correcting ring is made up of A uniform magnetic field correcting ring and B uniform magnetic field correcting ring, A uniform magnetic field correcting ring and B uniform magnetic field correcting ring on one side coaxial and gap be set in the A transmitting terminal of magnetic conduction armour iron and B transmitting terminal outside, described A uniform magnetic field correcting ring and B uniform magnetic field correcting ring can relative A transmitting terminal and B transmitting terminal move axially;
Described A uniform magnetic field correcting ring and B uniform magnetic field correcting ring are thin-wall circular loop configuration, have identical interior diameter, identical overall diameter and identical height;
Described radial magnetic field correcting coil group is by A radial magnetic field correcting coil, B radial magnetic field correcting coil, C radial magnetic field correcting coil and D radial magnetic field correcting coil composition, described A radial magnetic field correcting coil, B radial magnetic field correcting coil, C radial magnetic field correcting coil and D radial magnetic field correcting coil are " shape of a saddle " coil, and A radial magnetic field correcting coil and C radial magnetic field correcting coil have identical internal diameter, identical external diameter and identical height, B radial magnetic field correcting coil and D radial magnetic field correcting coil have identical internal diameter, identical external diameter and identical height, A radial magnetic field correcting coil has the internal diameter identical with the external diameter of B radial magnetic field correcting coil and both have identical thickness, relative with C radial magnetic field correcting coil position and in periphery with A radial magnetic field correcting coil, B radial magnetic field correcting coil and D radial magnetic field correcting coil positional symmetry and jointly surround circular configuration in interior position of enclosing and coaxial sleeve is located at by the outside of the magnet structure formed of A gradient magnetic field coil and B gradient magnetic field coil, the corresponding radian of interior hollow section in radial magnetic field correcting coil group on single coil flexure plane is 90 °, the overall radian of single coil flexure plane is 90+720 (Hj-hj)/(π (Dnj+Dwj)) degree, wherein Hj is coil whole height, hj is the interior hollow section height of coil, Dnj is coil interior diameter, Dwj is coil overall diameter,
Described A radial magnetic field correcting coil, B radial magnetic field correcting coil, C radial magnetic field correcting coil and D radial magnetic field correcting coil are by independent DC power supply, A radial magnetic field correcting coil passes to the identical electric current of size with C radial magnetic field correcting coil, B radial magnetic field correcting coil passes to the identical electric current of size with D radial magnetic field correcting coil, and A radial magnetic field correcting coil is different with the size of current in B radial magnetic field correcting coil, its current differential is determined by concrete coil dimension parameter, and the electric current being positioned at 4 arc-shaped edges of the upper and lower the same side of radial magnetic field correcting coil group in above-mentioned " shape of a saddle " coil is arrange with the clockwise that the axis around radial magnetic field correcting coil group is identical.
Preferably, also comprise thermostated cooling bath, described uniform field coil groups, gradient field coil group and radial magnetic field correcting coil group ectonexine be all surrounded with the coolant pipe that is connected with thermostated cooling bath and form cooling circuit.
As prior art, the solenoid structure with circular hole centered by main coil, A compensating coil, B compensating coil, C compensating coil, D compensating coil, A gradient magnetic field coil, B gradient magnetic field coil are equal.
Preferably, described main coil, A compensating coil, B compensating coil, C compensating coil, D compensating coil, A gradient magnetic field coil, B gradient magnetic field coil, A radial magnetic field correcting coil, B radial magnetic field correcting coil, C radial magnetic field correcting coil and D radial magnetic field correcting coil are all entwined by copper conductor using glass-reinforced plastic material as skeleton;
Preferably, described magnetic conduction armour iron, A uniform magnetic field correcting ring and B uniform magnetic field correcting ring process by magnetic conductive material, such as silicon steel, permalloy etc.
Open type magnetic Gravity Models pilot system gravity field analogy method, comprises the steps:
(1) respectively the cooling tube that main coil, A compensating coil, B compensating coil, C compensating coil, D compensating coil, A gradient magnetic field coil, B gradient magnetic field coil, A radial magnetic field correcting coil, B radial magnetic field correcting coil, C radial magnetic field correcting coil and D radial magnetic field correcting coil ectonexine are laid is connected with thermostated cooling bath, and opens thermostated cooling bath compressor and ebullator freezes to design temperature to coil;
(2) with between A gradient magnetic field coil and B gradient magnetic field coil and with the region corresponding to the interior hollow section of both A gradient magnetic field coil and B gradient magnetic field coil for pilot region, corresponding physical model and test and sensor-based system are installed in pilot region;
(3) power supply simultaneously connecting main coil, A compensating coil, B compensating coil, C compensating coil and D compensating coil in uniform magnetic field coil groups also passes to the strength of current of setting respectively, and carries out saturated magnetization by regulating the pilot region of position residing for physical model of A uniform magnetic field correcting ring and B uniform magnetic field correcting ring to produce axial uniform magnetic field to physical model;
(4) after saturated magnetization completes, connect the power supply of A radial magnetic field correcting coil, B radial magnetic field correcting coil, C radial magnetic field correcting coil and D radial magnetic field correcting coil in A gradient magnetic field coil in gradient magnetic field coil group, the power supply of B gradient magnetic field coil and radial magnetic field correcting coil group respectively according to predetermined simulated gravity field strength and pass to the electric current of predetermined size and Orientation simultaneously, the pilot region residing for physical model produces axial linear gradient magnetic field and eliminates radial magnetic field intensity and magnetic field gradient;
(5) corresponding physical experiments is carried out, continue to freeze to uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group by thermostated cooling bath in process of the test, and the temperature of each coil of Real-Time Monitoring and resistance value, if a certain parameter exceedes early warning value, immediately termination test;
(6) after physical experiments completes, disconnect the power supply of uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group respectively, and continue through thermostated cooling bath and continue to be cooled to room temperature to freezing to the coil of uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group to coil;
(7) compressor and the ebullator of thermostated cooling bath is stopped, termination test.
In general, selected direct supply is the adjustable DC power supply of power frequency way of full-wave rectification.
Beneficial effect:
Open type magnetic Gravity Models pilot system gravitational field simulation device provided by the invention and method thereof, prior art of comparing, possesses following advantage:
1, effectively overcome gravitational field simulation device in present stage magnetic Gravity Models test unit and be difficult to simulate the technical barrier of stronger gravity field, high strength uniform magnetic field on axial direction and high gradient linear magnetic field can be provided in open experimental enviroment, the gravity field strength exceeding an existing gravitational field simulation device simulated gravity field strength order of magnitude can be provided;
2, effectively overcome in present stage magnetic Gravity Models test unit and test the technical barrier that space-closed is narrow and small, be difficult to carry out test operation and test, open test space can be provided, make test operation and test no longer by the restriction in space, the scope greatly having expanded the physical experiments of carrying out and the measuring technology means that can adopt;
3, the technical barrier that cannot shield radial magnetic field intensity and gradient in present stage magnetic Gravity Models test unit is effectively overcomed, can provide at test space the magnetic field configuration meeting magnetic Gravity Models test method completely and require, drastically increase degree of accuracy and the validity of physical experiments.
Accompanying drawing explanation
Fig. 1 is inner structure schematic diagram of the present invention;
Fig. 2 is the front elevation of the magnetic conduction armour iron in the present invention;
Fig. 3 is the vertical view of the magnetic conduction armour iron in the present invention;
Fig. 4 is the structural representation of main coil in the present invention, and below is front view, top is upward view;
Fig. 5 is the structural representation of A compensating coil of the present invention and C compensating coil, and left side is front view, right side is left view;
Fig. 6 is the structural representation of B compensating coil of the present invention and D compensating coil, and below is front view, top is upward view;
Fig. 7 is the structural representation of A gradient magnetic field coil of the present invention and B gradient magnetic field coil, and below is front view, top is upward view;
Fig. 8 is the structural representation of A uniform magnetic field correcting ring of the present invention and B uniform magnetic field correcting ring, and below is front view, top is upward view;
Fig. 9 is the vertical view of radial compensating of the earth magnetic field coil groups in the present invention;
Figure 10 is the front elevation of A radial magnetic field correcting coil of the present invention;
In figure: 1, main coil, 2A, A compensating coil, 2B, C compensating coil, 3A, B compensating coil, 3B, D compensating coil; 4A, A gradient magnetic field coil, 4B, B gradient magnetic field coil; 5, magnetic conduction armour iron, 5A, " C " type magnetic conductor, 5B, A transmitting terminal, 5C, B transmitting terminal; 6A, A uniform magnetic field correcting ring, 6B, B uniform magnetic field correcting ring; 7A, A radial magnetic field correcting coil, 7B, B radial magnetic field correcting coil, 7C, C radial magnetic field correcting coil, 7D, D radial magnetic field correcting coil.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, be a kind of open type magnetic Gravity Models pilot system gravitational field simulation device, comprise uniform magnetic field coil groups, gradient magnetic field coil group, magnetic conduction armour iron 5, uniform magnetic field correcting ring and radial magnetic field correcting coil group.
Described uniform magnetic field coil groups is made up of main coil 1 and compensating coil group, described compensating coil group is made up of A compensating coil 2A, B compensating coil 3A, C compensating coil 2B and D compensating coil 3B, and the interior diameter of described main coil 1, A compensating coil 2A, B compensating coil 3A, C compensating coil 2B and D compensating coil 3B is 400mm;
Described main coil 1, A compensating coil 2A, B compensating coil 3A, C compensating coil 2B and D compensating coil 3B are by independent DC power supply, A compensating coil 2A has the identical current field in direction with B compensating coil 3A with main coil 1, and C compensating coil 2B and D compensating coil 3B has the current field contrary with main coil direction;
Described main coil 1, A compensating coil 2A, B compensating coil 3A, C compensating coil 2B and D compensating coil 3B press equidirectional by copper conductor and are wound around composition, and coil winding all adopts glass-reinforced plastic material as skeleton, to ensure the physical strength of coil.Described main coil 1, A compensating coil 2A, B compensating coil 3A, C compensating coil 2B and D compensating coil 3B are the structure of center hole, respectively as shown in Fig. 4, Fig. 5, Fig. 6: as described in main coil 1 interior diameter be 400mm, overall diameter is 600mm, is highly 550mm; The interior diameter of described A compensating coil 2A and B compensating coil 3A is 400mm, and overall diameter is 450mm, is highly 400mm; The interior diameter of described C compensating coil 2B and D compensating coil 3B is 400mm, and overall diameter is 500mm, is highly 43.5mm.
Described gradient magnetic field coil group is made up of A gradient magnetic field coil 4A and B gradient magnetic field coil 4B, A gradient magnetic field coil 4A and B gradient magnetic field coil 4B is by independent DC power supply, and during energising, A gradient magnetic field coil 4A has with B gradient magnetic field coil 4B the current field that size is identical, direction is contrary;
Described A gradient magnetic field coil 4A and B gradient magnetic field coil 4B presses equidirectional by copper conductor and is wound around composition, and coil winding all adopts glass-reinforced plastic material as skeleton, to ensure the physical strength of coil.Described A gradient magnetic field coil 4A and B gradient magnetic field coil 4B is the structure of center hole, as shown in Figure 7: the interior diameter of described A gradient magnetic field coil 4A and B gradient magnetic field coil 4B is 200mm, and overall diameter is 500mm, is highly 100mm; Described A gradient magnetic field coil 4A and B gradient magnetic field coil 4B coaxial-symmetrical are fixed, and there is gap between A gradient magnetic field coil 4A and B gradient magnetic field coil 4B, and its clear spacing is
be 203mm.
As shown in Figure 2 and Figure 3, described magnetic conduction armour iron 5 is made up of " C " type magnetic conductor 5A and transmitting terminal, and described transmitting terminal comprises A transmitting terminal 5B and the upper and lower coaxial-symmetrical of B transmitting terminal 5C, A transmitting terminal 5B and B transmitting terminal 5C is installed, and its clear distance is determined by Hf=Dt+2H, is 203mm; Described C " type magnetic conductor 5A is circular cross section and has the diameter identical with the interior diameter of main coil in shim coil set 1, is 400mm.
Main coil 1 coaxial sleeve in described shim coil set is located on the vertical long column on the left of " C " type magnetic conductor 5A, A compensating coil 2A and C compensating coil 3A respectively coaxial sleeve is located on the horizontal spreader of " C " type magnetic conductor 5A upper and lower, and B compensating coil 2B and D compensating coil 3B respectively coaxial sleeve is located on the vertical short column of " C " type magnetic conductor 5A right upper portion and bottom.
Described A gradient magnetic field coil 4A and B gradient magnetic field coil 4B coaxial-symmetrical are arranged in the A transmitting terminal 5B of magnetic conduction armour iron 5 and the gap of B transmitting terminal 5C centre, and A gradient magnetic field coil 4A is close to A transmitting terminal 5B, and B gradient magnetic field coil 4B is close to B transmitting terminal 5C.
Described uniform magnetic field correcting ring is made up of A uniform magnetic field correcting ring 6A and B uniform magnetic field correcting ring 6B, A uniform magnetic field correcting ring 6A and B uniform magnetic field correcting ring 6B respectively coaxial sleeve is located at A transmitting terminal 5B and the B transmitting terminal 5C outside of magnetic conduction armour iron 5, and described A uniform magnetic field correcting ring 6A can move up and down by relative A transmitting terminal 5B and B transmitting terminal 5C with B uniform magnetic field correcting ring 6B;
Described A uniform magnetic field correcting ring 6A and B uniform magnetic field correcting ring 6B is thin-wall circular loop configuration, and as shown in Figure 8, and its interior diameter is 500mm, and overall diameter is 540mm, is highly 100mm.
As shown in Figure 9, Figure 10, described radial magnetic field correcting coil group is made up of A radial magnetic field correcting coil 7A, B radial magnetic field correcting coil 7B, C radial magnetic field correcting coil 7C and D radial magnetic field correcting coil 7D, and described A radial magnetic field correcting coil 7A, B radial magnetic field correcting coil 7B, C radial magnetic field correcting coil 7C and D radial magnetic field correcting coil 7D is " shape of a saddle " coil and jointly surrounds circular configuration and coaxial sleeve is located at by the outside of the magnet structure formed of A gradient magnetic field coil 4A and B gradient magnetic field coil 4B;
The interior diameter of described A radial magnetic field correcting coil 7A and C radial magnetic field correcting coil 7C is 700mm, and overall diameter is 800mm, is highly 400mm, and overall radian is 125 °, and the corresponding radian of interior hollow section is 90 °, is highly 200mm; The interior diameter of B radial magnetic field correcting coil 7B and D radial magnetic field correcting coil 7D is 600mm, and overall diameter is 700mm, is highly 400mm, and overall radian is 120 °, and the corresponding radian of interior hollow section is 90 °, is highly 200mm.
Described A radial magnetic field correcting coil 7A, B radial magnetic field correcting coil 7B, C radial magnetic field correcting coil 7C and D radial magnetic field correcting coil 7D is by independent DC power supply, it is identical that A radial magnetic field correcting coil 7A and C radial magnetic field correcting coil 7C pass to size, the electric current that direction is contrary, it is identical that B radial magnetic field correcting coil 7B and D radial magnetic field correcting coil 7D pass to size, the electric current that direction is contrary, the electric current of 4 arc-shaped edges being positioned at the upper and lower the same side of radial magnetic field correcting coil group in above-mentioned " shape of a saddle " coil is made to be arrange with the clockwise that the axis around radial magnetic field correcting coil group is identical, and A radial magnetic field correcting coil and B radial magnetic field correcting coil pass to the contrary but electric current varied in size in direction, its working current ratio is 1.4:1.
Described uniform field coil groups, gradient field coil group and radial magnetic field correcting coil group ectonexine be all surrounded with the coolant pipe that is connected with thermostated cooling bath and form cooling circuit.Described magnetic conduction armour iron 5, A uniform magnetic field correcting ring 6A and B uniform magnetic field correcting ring 6B process by silicon steel.
Open type magnetic Gravity Models pilot system gravity field analogy method, comprises the steps:
(1) respectively main coil 1, A compensating coil 2A, B compensating coil 3A, C compensating coil 2B, D compensating coil 3B, A gradient magnetic field coil 4A, B gradient magnetic field coil 4B, A radial magnetic field correcting coil 7A, B radial magnetic field correcting coil 7B, C radial magnetic field correcting coil 7C are connected with thermostated cooling bath with the cooling tube that D radial magnetic field correcting coil 7D ectonexine is laid, and open thermostated cooling bath compressor and ebullator freezes to design temperature to coil;
(2) with between A gradient magnetic field coil 4A and B gradient magnetic field coil 4B and with the region corresponding to the interior hollow section of both A gradient magnetic field coil 4A and B gradient magnetic field coil 4B for pilot region, corresponding physical model and test and sensor-based system are installed in pilot region;
(3) power supply simultaneously connecting main coil 1, A compensating coil 2A, B compensating coil 3A, C compensating coil 2B and D compensating coil 3B in uniform magnetic field coil groups also passes to the strength of current of setting respectively, and by regulating the pilot region of position residing for physical model of A uniform magnetic field correcting ring 6A and B uniform magnetic field correcting ring 6B to produce axial uniform magnetic field, saturated magnetization being carried out to physical model, table 1 gives this part input current intensity I
1with the corresponding relation of uniform magnetic field intensity in pilot region;
(4) after saturated magnetization completes, A gradient magnetic field coil 4A in gradient magnetic field coil group is connected respectively according to predetermined simulated gravity field strength, A radial magnetic field correcting coil 7A in the power supply of B gradient magnetic field coil 4B and radial magnetic field correcting coil group, B radial magnetic field correcting coil 7B, the power supply of C radial magnetic field correcting coil 7C and D radial magnetic field correcting coil 7D also passes to the electric current of predetermined size and Orientation simultaneously, test space residing for physical model produces axial linear gradient magnetic field and eliminates radial magnetic field intensity and magnetic field gradient, table 2 gives axial magnetic field gradient and this part input current intensity I in pilot region
2corresponding relation,
(5) corresponding physical experiments is carried out, continue to freeze to uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group by thermostated cooling bath in process of the test, and the temperature of each coil of Real-Time Monitoring and resistance value, if a certain parameter exceedes early warning value, immediately termination test;
(6) after physical experiments completes, disconnect the power supply of uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group respectively, and continue through thermostated cooling bath and continue to be cooled to room temperature to freezing to the coil of uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group to coil;
(7) compressor and the ebullator of thermostated cooling bath is stopped, termination test.
Table 1. strength of current I
1with the corresponding relation of uniform magnetic field intensity in pilot region
Table 2. strength of current I
2with the corresponding relation of the axial magnetic field gradient in pilot region
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. open type magnetic Gravity Models pilot system gravitational field simulation device, is characterized in that: comprise uniform magnetic field coil groups, gradient magnetic field coil group, magnetic conduction armour iron (5), uniform magnetic field correcting ring and radial magnetic field correcting coil group;
Described magnetic conduction armour iron (5) is made up of matrix and the transmitting terminal be arranged on matrix, described matrix is the xsect that a vertical long column and two the horizontal spreaders being arranged at vertical long column two ends are formed is circular " C " type magnetic conductor (5A), and the end of the horizontal spreader of " C " type magnetic conductor (5A) opening part has the vertical short column arranged to opening inner side, described transmitting terminal comprises A transmitting terminal (5B) and B transmitting terminal (5C), A transmitting terminal (5B) and B transmitting terminal (5C) on one side one relatively coaxial and clear distance on the vertical short column being symmetricly set on the end of the horizontal spreader of the opening part of " C " type magnetic conductor (5A) and between A transmitting terminal (5B) and B transmitting terminal (5C) is Hf=Dt+2H,
Described uniform magnetic field coil groups is made up of main coil (1) and compensating coil group, described main coil (1) coaxial sleeve is located on the vertical long column in " C " type magnetic conductor (5A) left side, described compensating coil group is by A compensating coil (2A), B compensating coil (3A), C compensating coil (2B) and D compensating coil (3B) composition, described A compensating coil (2A) and C compensating coil (2B) respectively coaxial sleeve are located on two horizontal spreaders of " C " type magnetic conductor (5A), B compensating coil (3A) and D compensating coil (3B) respectively coaxial sleeve are located on the vertical short column of " C " type magnetic conductor (5A) opening part, above-mentioned main coil (1), A compensating coil (2A), B compensating coil (3A), C compensating coil (2B) and D compensating coil (3B) all have identical internal diameter and identical with the cross-sectional diameter of " C " type magnetic conductor (5A),
Described main coil (1), A compensating coil (2A), B compensating coil (3A), C compensating coil (2B) and D compensating coil (3B) are by independent DC power supply, during energising, A compensating coil (2A) has the identical current field in direction with B compensating coil (3A) with main coil (1), and C compensating coil (2B) and D compensating coil (3B) have the current field contrary with main coil direction;
Described gradient magnetic field coil group is made up of A gradient magnetic field coil (4A) and B gradient magnetic field coil (4B), A gradient magnetic field coil (4A) and B gradient magnetic field coil (4B) have identical interior diameter Dn, same external diameter Dw, identical height H, A gradient magnetic field coil (4A) and B gradient magnetic field coil (4B) are coaxially fixed in the gap between the A transmitting terminal (5B) of magnetic conduction armour iron (5) and B transmitting terminal (5C), A gradient magnetic field coil (4A) is close to A transmitting terminal, B gradient magnetic field coil (4B) is close to B transmitting terminal, and there is gap between A gradient magnetic field coil (4A) and B gradient magnetic field coil (4B)
Described A gradient magnetic field coil (4A) and B gradient magnetic field coil (4B) are by independent DC power supply, and during energising, A gradient magnetic field coil (4A) has with B gradient magnetic field coil (4B) current field that size is identical, direction is contrary;
Described uniform magnetic field correcting ring is made up of A uniform magnetic field correcting ring (6A) and B uniform magnetic field correcting ring (6B), described A uniform magnetic field correcting ring (6A) and B uniform magnetic field correcting ring (6B) are cirque structure and have identical interior diameter, identical overall diameter and identical height, and A uniform magnetic field correcting ring (6A) and B uniform magnetic field correcting ring (6B) are coaxial and gap is set in the A transmitting terminal (5B) of magnetic conduction armour iron (5) and the outside of B transmitting terminal (5C);
Described radial magnetic field correcting coil group is by A radial magnetic field correcting coil (7A), B radial magnetic field correcting coil (7B), C radial magnetic field correcting coil (7C) and D radial magnetic field correcting coil (7D) composition, described A radial magnetic field correcting coil (7A), B radial magnetic field correcting coil (7B), C radial magnetic field correcting coil (7C) and D radial magnetic field correcting coil (7D) are " shape of a saddle " coil, and A radial magnetic field correcting coil (7A) and C radial magnetic field correcting coil (7C) have identical internal diameter, identical external diameter and identical height, B radial magnetic field correcting coil (7B) and D radial magnetic field correcting coil (7D) have identical internal diameter, identical external diameter and identical height, A radial magnetic field correcting coil (7A) has the internal diameter identical with the external diameter of B radial magnetic field correcting coil (7B) and both have identical thickness, relative with C radial magnetic field correcting coil (7C) position and in periphery with A radial magnetic field correcting coil (7A), B radial magnetic field correcting coil (7B) and D radial magnetic field correcting coil (7D) positional symmetry and jointly surround circular configuration in interior position of enclosing and coaxial sleeve is located at by the outside of the magnet structure formed of A gradient magnetic field coil (4A) and B gradient magnetic field coil (4B), the corresponding radian of interior hollow section in radial magnetic field correcting coil group on single coil flexure plane is 90 °, the overall radian of single coil coil bent curved surface is 90+720 (Hj-hj)/(π (Dnj+Dwj)) degree, wherein Hj is coil whole height, hj is the interior hollow section height of coil, Dnj is coil interior diameter, Dwj is coil overall diameter,
Described A radial magnetic field correcting coil (7A), B radial magnetic field correcting coil (7B), C radial magnetic field correcting coil (7C) and D radial magnetic field correcting coil (7D) are by independent DC power supply, A radial magnetic field correcting coil (7A) passes to the identical electric current of size with C radial magnetic field correcting coil (7C), B radial magnetic field correcting coil (7B) passes to the identical electric current of size with D radial magnetic field correcting coil (7D), and A radial magnetic field correcting coil (7A) is different with the size of current in B radial magnetic field correcting coil (7B), and the electric current being positioned at 4 arc-shaped edges of the upper and lower the same side of radial magnetic field correcting coil group in above-mentioned " shape of a saddle " coil is arrange with the clockwise that the axis around radial magnetic field correcting coil group is identical.
2. open type magnetic Gravity Models pilot system gravitational field simulation device according to claim 1, is characterized in that: described magnetic conduction armour iron (5), A uniform magnetic field correcting ring (6A) and B uniform magnetic field correcting ring (6B) process by magnetic conductive material.
3. open type magnetic Gravity Models pilot system gravitational field simulation device according to claim 1, it is characterized in that: also comprise thermostated cooling bath, described uniform field coil groups, gradient field coil group and radial magnetic field correcting coil group ectonexine be all surrounded with the coolant pipe that is connected with thermostated cooling bath and form cooling circuit.
4. open type magnetic Gravity Models pilot system gravitational field simulation device according to claim 1, is characterized in that: described main coil, A compensating coil, B compensating coil, C compensating coil, D compensating coil, A gradient magnetic field coil, B gradient magnetic field coil, A radial magnetic field correcting coil, B radial magnetic field correcting coil, C radial magnetic field correcting coil and D radial magnetic field correcting coil are all entwined by copper conductor using glass-reinforced plastic material as skeleton.
5. the analogy method of open type magnetic Gravity Models pilot system gravitational field simulation device according to claim 1, is characterized in that: comprise the following steps that order performs:
(1) respectively the cooling tube that main coil (1), A compensating coil (2A), B compensating coil (3A), C compensating coil (2B), D compensating coil (3B), A gradient magnetic field coil (4A), B gradient magnetic field coil (4B), A radial magnetic field correcting coil (7A), B radial magnetic field correcting coil (7B), C radial magnetic field correcting coil (7C) and D radial magnetic field correcting coil (7D) ectonexine are laid is connected with thermostated cooling bath, and opens thermostated cooling bath compressor and ebullator freezes to design temperature to coil;
(2) to be positioned between A gradient magnetic field coil (4A) and B gradient magnetic field coil (4B) and with the region corresponding to both interior hollow section of A gradient magnetic field coil (4A) and B gradient magnetic field coil (4B) for pilot region, corresponding physical model and test and sensor-based system are installed in pilot region;
(3) power supply simultaneously connecting main coil (1), A compensating coil (2A), B compensating coil (3A), C compensating coil (2B) and D compensating coil (3B) in uniform magnetic field coil groups also passes to the strength of current of setting respectively, and carries out saturated magnetization by regulating the test space of position residing for physical model of A uniform magnetic field correcting ring (6A) and B uniform magnetic field correcting ring (6B) to produce axial uniform magnetic field to physical model;
(4) after saturated magnetization completes, A gradient magnetic field coil (4A) in gradient magnetic field coil group is connected respectively according to predetermined simulated gravity field strength, A radial magnetic field correcting coil (7A) in the power supply of B gradient magnetic field coil (4B) and radial magnetic field correcting coil group, B radial magnetic field correcting coil (7B), the power supply of C radial magnetic field correcting coil (7C) and D radial magnetic field correcting coil (7D) also passes to the electric current of predetermined size and Orientation simultaneously, pilot region residing for physical model produces axial linear gradient magnetic field and eliminates radial magnetic field intensity and magnetic field gradient,
(5) corresponding physical experiments is carried out, continue to freeze to uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group by thermostated cooling bath in process of the test, and the temperature of each coil of Real-Time Monitoring and resistance value, if a certain parameter exceedes early warning value, immediately termination test;
(6) after physical experiments completes, disconnect the power supply of uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group respectively, and continue through thermostated cooling bath and continue to be cooled to room temperature to freezing to the coil of uniform magnetic field coil groups, gradient magnetic field coil group and radial magnetic field correcting coil group to coil;
(7) compressor and the ebullator of thermostated cooling bath is stopped, termination test.
6. the analogy method of open type magnetic Gravity Models pilot system gravity field device according to claim 5, is characterized in that: selected direct supply is the adjustable DC power supply of power frequency way of full-wave rectification.
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