CN103837320B - A kind of water surface flying device splash list hull model basin test method - Google Patents
A kind of water surface flying device splash list hull model basin test method Download PDFInfo
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Abstract
A kind of water surface flying device splash list hull model basin test method, test procedure is as follows: a) single hull model test is installed; B) testing equipment is installed; C) water surface flying device splash list hull model basin test.Advantage of the present invention is: the method is practical, feasible, simple to operate, and test findings is reliable, applied widely.
Description
Technical field
The present invention is specifically related to a kind of water surface flying device splash list hull model basin test method.
Background technology
Requirement at present with water surface flying device usable range significantly promotes, and behaviour at sea requires to improve gradually, also proposes higher requirement to the design of its water surface splash performance; For checking has the water surface flying device design of excellent water surface splash performance, at present mainly through water surface flying device splash pool scale model test, this model test can be divided into water surface flying device splash list hull model basin to test and the full mechanomotive force model basin test of water surface flying device splash; Single hull model basin tests the important means as shipform Selecting parameter and splash Preliminary Performance Analysis, in the checking of water surface flying device splash performance, play important reference role; By drawing splash envelope research water surface flying device model splash performance in single hull model basin test, and preliminarily predict the splash performance of water surface flying device thus, and then preliminarily verify the splash performance design of water surface flying device; Also there is not a kind of water surface flying device splash list hull model basin test method of practicality at present.
Summary of the invention
Object of the present invention is exactly for above-mentioned deficiency, and provides a kind of water surface flying device splash list hull model basin test method;
Test procedure of the present invention is as follows:
A) single hull model test is installed:
Single hull model is suspended on below hydrodynamic force high-speed test (HST) acting trailer system by discharge mechanism, comprise wire rope to drag the towing gear of line to pull single hull model to move together with trailer, discharge mechanism is by two pulleys, unloader box and wire rope messenger wire composition, two pulleys respectively by support installing bottom hydrodynamic force high-speed test (HST) acting trailer system, wire rope messenger wire is around on two pulleys, unloader box is arranged on wire rope messenger wire one end, the wire rope messenger wire other end is connected with single hull model, towing gear is by tugboat, wire rope drags line to form, tugboat by support installing in single hull model front, wire rope drags wire-wound on tugboat, wire rope drags line one end to be connected with the seaworthiness instrument below hydrodynamic force high-speed test (HST) acting trailer system, the other end is connected with single hull model, the tie point of towing gear and discharge mechanism and single hull model answers delivery type centre of gravity place point, and wire rope drags line substantially parallel with the water surface, single hull model can around the free pitch rotation of centre of gravity place point, and use pole to be dragged by wire rope line to be placed in single hull model both sides, thus can prevent wire rope from dragging line to disturb single hull model around the free pitch rotation of centre of gravity place point, front navigational chip and rear navigational chip respectively with bottom hydrodynamic force high-speed test (HST) acting trailer system before navigate bar and rear navigation bar match to prevent single hull model in process of the test from producing and go off course, under single hull model after water, longitudinal center of gravity should remain unchanged, bonding hull model is without obvious heel, record cast bow aft draft and initial attitude angle simultaneously, under its reading and this state, calculated value should be consistent, front navigational chip and rear navigational chip are arranged on single hull model rear and front end respectively, towing gear, front navigation bar and rear navigation bar are arranged on seaworthiness instrument,
B) testing equipment is installed:
The equipment relevant to splash list hull model test has front camera, side camera, camera fixing device, background grid, obliquity sensor and position transducer, and camera fixing device ensures the following installation requirement of camera:
I) front camera and side camera are arranged on dried up sustained height place, and using camera fixing device to be arranged on below hydrodynamic test high speed trailer by front camera and side camera, adjustment camera heights and focal length clearly can photograph the splash peak dot of single hull model on the water surface under exercise sessions prestige speed;
Ii) front camera should be positioned at model front, and its center of lens axis answers parallel model to indulge midship section, and the parallel water surface, side camera should be positioned at grid side, model side, and its center of lens axis line answers vertical mould to indulge midship section, record the measurement parameter that each camera is relevant, and camera synchronization photograph control device should be able to keep before, side two camera substantially can sync pulse jamming;
Iii) background grid is arranged on seaworthiness instrument, and is positioned at single hull model rear, and background grid answers vertical mould to indulge midship section, and ensures that background grid does not produce obviously to rock in process of the test and avoid affecting result precision;
Iv) obliquity sensor and position transducer are respectively used to model trim angle and model center of gravity place's heave value in acquisition test, and obliquity sensor is arranged on single hull model, and position transducer is arranged on seaworthiness instrument;
C) water surface flying device splash list hull model basin test:
Put into the required counterweight of test in unloader box in discharge mechanism after, hydrodynamic force high-speed test (HST) acting trailer system pulls single hull model and moves on the water surface when moving in orbit, after trailer accelerates to reach the travelling speed of testing requirements, continue to keep trailer travelling speed to be stabilized in the minimum variation range of this towed speed, record now trailer speed and placing an order hull model attitude angle in this towed speed, center of gravity heave is equivalent, and camera before using, side camera respectively in the past, taking pictures of model sport state and spraying state is synchronously carried out in direction, side two, after off-test, experimental data processing personnel are by corresponding trystate, in the past the photo of camera reads splash peak dot projection coordinate y respectively
1, z
1, and read splash peak dot projection coordinate x from the photo of synchronous side camera
1through converting, obtain splash peak dot coordinate x, y and the z relative to keel place faulted-stage, by splash peak dot coordinate x, y and z value under each speed, draw splash envelope, availability deciding is carried out to the raw data of collecting, reject fail data, the data of test data and expection are compared, the validity and reliability of preliminary judgement result, analyzing and processing is carried out to abnormal data, provides result,
By splash peak dot projection coordinate x
1, y
1and z
1draw splash peak dot coordinate x, y and the z relative to keel place faulted-stage by following relational expression, calculation procedure is as follows, first splash peak dot projection coordinate x
1, y
1and z
1conversion obtains
,
with
, as shown in Figure 4:
(1)
(2)
(3)
In formula:
A-front camera center of lens point is to faulted-stage distance;
B-front camera center of lens point is to model surface distance;
C-side camera center of lens point is to model surface distance;
D-front camera center of lens point is to the distance of tail grid;
E-front camera center of lens point is to the fore-and-aft distance of side image center point;
Then will
,
with
through converting, obtain splash peak dot coordinate x, y and the z relative to keel place faulted-stage;
(4)
(5)
(6)
In formula:
H
1-under fuselage coordinates system center of gravity from the height of faulted-stage;
Z
g-under fuselage coordinates system distance of centre of gravity level reference distance;
△ x
g-under fuselage coordinates system the fore-and-aft distance of center of gravity and faulted-stage;
F-front camera center of lens axis water clearance;
-initial attitude angle;
△ h-model center of gravity place's heave;
-attitude angle;
B
1-model faulted-stage place half bilge is wide;
the distance of dried up of keel faulted-stage point when-model is still in the water surface;
By splash peak dot coordinate x, y and z value under each speed above-mentioned, draw splash envelope.
Advantage of the present invention is: the method is practical, feasible, simple to operate, and test findings is reliable, applied widely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is Fig. 1 forward sight structural representation;
Fig. 3 is that the main jet of Fig. 1 spatters envelope drafting schematic diagram;
Fig. 4 is that the side spray of Fig. 1 spatters envelope drafting schematic diagram.
Embodiment
Test procedure of the present invention is as follows:
A) single hull model test is installed:
Single hull model 1 is suspended on below hydrodynamic force high-speed test (HST) acting trailer system 17 by discharge mechanism 16, comprise wire rope to drag the towing gear 2 of line 4 to pull single hull model 1 to move together with trailer, discharge mechanism 16 is by two pulleys 19, unloader box 21 and wire rope messenger wire 22 form, two pulleys 19 respectively by support installing bottom hydrodynamic force high-speed test (HST) acting trailer system 17, wire rope messenger wire 22 is around on two pulleys 19, unloader box 21 is arranged on wire rope messenger wire 22 one end, wire rope messenger wire 22 other end is connected with single hull model 1, towing gear 2 is by tugboat 23, wire rope drags line 4 to form, tugboat 23 by support installing in single hull model 1 front, wire rope drags line 4 around on tugboat 23, wire rope drags line 4 one end to be connected with the seaworthiness instrument 12 below hydrodynamic force high-speed test (HST) acting trailer system 17, the other end is connected with single hull model 1, towing gear 2 and discharge mechanism 16 answer delivery type centre of gravity place point with the tie point of single hull model 1, and wire rope drags line 4 substantially parallel with the water surface, single hull model 1 can around the free pitch rotation of centre of gravity place point, and use pole to be dragged by wire rope line 4 to be placed in single hull model 1 both sides, thus can prevent wire rope from dragging line 4 to disturb single hull model 1 around the free pitch rotation of centre of gravity place point, front navigational chip 6 and rear navigational chip 14 respectively with bottom hydrodynamic force high-speed test (HST) acting trailer system 17 before navigate bar 7 and rear navigation bar 13 match to prevent single hull model 1 in process of the test from producing and go off course, after single hull model 1 time water, longitudinal center of gravity should remain unchanged, bonding hull model 1 is without obvious heel, record cast bow aft draft and initial attitude angle simultaneously, under its reading and this state, calculated value should be consistent, front navigational chip 6 and rear navigational chip 14 are arranged on single hull model 1 rear and front end respectively, towing gear 2, front navigation bar 7 and rear navigation bar 13 are arranged on seaworthiness instrument 12,
B) testing equipment is installed:
The equipment relevant to splash list hull model test has front camera 5, side camera 11, camera fixing device 3, background grid 15, obliquity sensor 9 and position transducer 10, and camera fixing device 3 ensures the following installation requirement of camera:
I) front camera 5 and side camera 11 are arranged on dried up sustained height place, and using camera fixing device 3 to be arranged on below hydrodynamic test high speed trailer 17 by front camera 5 and side camera 11, adjustment camera heights and focal length clearly can photograph the splash peak dot of single hull model 1 on the water surface under exercise sessions prestige speed;
Ii) front camera 5 should be positioned at model front, and its center of lens axis answers parallel model to indulge midship section, and the parallel water surface, side camera 11 should be positioned at grid side, model side, and its center of lens axis line answers vertical mould to indulge midship section, record the measurement parameter that each camera is relevant, and camera synchronization photograph control device should be able to keep before, side two camera substantially can sync pulse jamming;
Iii) background grid 15 is arranged on seaworthiness instrument 12, and is positioned at single hull model 1 rear, and background grid 15 answers vertical mould to indulge midship section, and ensures that background grid 15 does not produce obviously to rock in process of the test and avoid affecting result precision;
Iv) obliquity sensor 9 and position transducer 10 are respectively used to model trim angle and model center of gravity place's heave value in acquisition test, and obliquity sensor 9 is arranged on single hull model 1, and position transducer 10 is arranged on seaworthiness instrument 12;
C) water surface flying device splash list hull model basin test:
Put into the required counterweight of test in unloader box in discharge mechanism 16 after, hydrodynamic force high-speed test (HST) acting trailer system 17 pulls single hull model when moving in orbit and moves on the water surface, after trailer accelerates to reach the travelling speed of testing requirements, continue to keep trailer travelling speed to be stabilized in the minimum variation range of this towed speed, record now trailer speed and placing an order hull model attitude angle in this towed speed, center of gravity heave is equivalent, and camera 5 before using, side camera 11 respectively in the past, taking pictures of model sport state and spraying state is synchronously carried out in direction, side two, after off-test, experimental data processing personnel are by corresponding trystate, in the past the photo of camera reads splash peak dot projection coordinate y respectively
1, z
1, and read splash peak dot projection coordinate x from the photo of synchronous side camera
1through converting, obtain splash peak dot coordinate x, y and the z relative to keel place faulted-stage, by splash peak dot coordinate x, y and z value under each speed, draw splash envelope, availability deciding is carried out to the raw data of collecting, reject fail data, the data of test data and expection are compared, the validity and reliability of preliminary judgement result, analyzing and processing is carried out to abnormal data, provides result,
By splash peak dot projection coordinate x in photo
1, y
1and z
1draw splash peak dot coordinate x, y and the z relative to keel place faulted-stage by following relational expression, calculation procedure is as follows, first splash peak dot projection coordinate x
1, y
1and z
1conversion obtains
,
with
, as shown in Figure 4:
(1)
(2)
(3)
In formula:
A-front camera center of lens point is to faulted-stage distance;
B-front camera center of lens point is to model surface distance;
C-side camera center of lens point is to model surface distance;
D-front camera center of lens point is to the distance of tail grid;
E-front camera center of lens point is to the fore-and-aft distance of side image center point;
Then will
,
with
through converting, obtain splash peak dot coordinate x, y and the z relative to keel place faulted-stage;
(4)
(5)
(6)
In formula:
H
1-under fuselage coordinates system center of gravity from the height of faulted-stage;
Z
g-under fuselage coordinates system distance of centre of gravity level reference distance;
△ x
g-under fuselage coordinates system the fore-and-aft distance of center of gravity and faulted-stage;
F-front camera center of lens axis water clearance;
-initial attitude angle;
△ h-model center of gravity place's heave;
-attitude angle;
B
1-model faulted-stage place half bilge is wide;
the distance of dried up of keel faulted-stage point when-model is still in the water surface;
By splash peak dot coordinate x, y and z value under each speed above-mentioned, draw splash envelope.
Test method principle is as follows:
The positional information of spattering peak dot by main jet in single hull model test draws splash envelope (as shown in 3,4, main jet spatters envelope 19 and surveys splash envelope 20), studies single hull model splash performance, and then the splash performance of prediction real machine, splash envelope is that under next series rate of a trystate, main jet spatters peak dot line successively, this method is used mainly to obtain the positional information that main jet spatters peak dot, the positional information of peak dot is spattered for obtaining main jet, first this method utilizes triangle similarity relation main jet to be spattered peak dot to project in side and two, front plane respectively, namely before using respectively, main jet is spattered peak dot and is projected in facet model surface mesh and front tail grid respectively by side two camera, then utilize geometric transform relation formula by front, in the camera photos of side, splash peak dot projection coordinate converts and obtains spattering peak dot coordinate relative to the main jet of model faulted-stage, because photos in camera reduces in a certain ratio material object, institute thinks and finds out this proportionate relationship, the grid of reference is prepared in advance in each camera, namely background grid in camera before, model side grid in the camera of side, in addition, in single hull model test, need to use counterweight handling in discharge mechanism 16 to simulate the aerodynamic lift increase and decrease of real machine, under same weight, center of gravity state, in discharge mechanism 16, counterweight weight changes with velocity variations.
Result evaluation:
Test data analyzer personnel carry out availability deciding to raw data and splash peak dot coordinate, reject fail data; The data of each test figure and expection are compared, the validity and reliability of preliminary judgement result; Analyzing and processing is carried out to abnormal data, provides result.
Claims (1)
1. a water surface flying device splash list hull model basin test method, is characterized in that test procedure is as follows:
A) single hull model test is installed:
Single hull model (1) is suspended on hydrodynamic force high-speed test (HST) acting trailer system (17) below by discharge mechanism (16), comprise wire rope to drag the towing gear of line (4) (2) to pull single hull model (1) to move together with trailer, discharge mechanism (16) is by two pulleys (19), unloader box (21) and wire rope messenger wire (22) composition, two pulleys (19) respectively by support installing in hydrodynamic force high-speed test (HST) acting trailer system (17) bottom, wire rope messenger wire (22) is around on two pulleys (19), unloader box (21) is arranged on wire rope messenger wire (22) one end, wire rope messenger wire (22) other end is connected with single hull model (1), towing gear (2) is by tugboat (23), wire rope drags line (4) to form, tugboat (23) by support installing in single hull model (1) front, wire rope drags line (4) around on tugboat (23), wire rope drags line (4) one end to be connected with the seaworthiness instrument (12) of hydrodynamic force high-speed test (HST) acting trailer system (17) below, the other end is connected with single hull model (1), towing gear (2) and discharge mechanism (16) answer delivery type centre of gravity place point with the tie point of single hull model (1), and wire rope drags line (4) substantially parallel with the water surface, single hull model (1) can around the free pitch rotation of centre of gravity place point, and use pole to be dragged by wire rope line (4) to be placed in single hull model (1) both sides, thus can prevent wire rope from dragging line (4) to disturb single hull model (1) around the free pitch rotation of centre of gravity place point, front navigational chip (6) and rear navigational chip (14) match to prevent single hull model (1) in process of the test from producing with the front navigation bar (7) bottom hydrodynamic force high-speed test (HST) acting trailer system (17) and rear navigation bar (13) respectively and go off course, under single hull model (1) after water, longitudinal center of gravity should remain unchanged, bonding hull model (1) is without obvious heel, record cast bow aft draft and initial attitude angle simultaneously, under its reading and this state, calculated value should be consistent, front navigational chip (6) and rear navigational chip (14) are arranged on single hull model (1) rear and front end respectively, towing gear (2), front navigation bar (7) and rear navigation bar (13) are arranged on seaworthiness instrument (12),
B) testing equipment is installed:
The equipment relevant to splash list hull model test has front camera (5), side camera (11), camera fixing device (3), background grid (15), obliquity sensor (9) and position transducer (10), and camera fixing device (3) ensures the following installation requirement of camera:
I) front camera (5) and side camera (11) are arranged on dried up sustained height place, and using camera fixing device (3) front camera (5) and side camera (11) to be arranged on hydrodynamic test high speed acting trailer system (17) below, adjustment camera heights and focal length clearly can photograph the splash peak dot of single hull model (1) on the water surface under exercise sessions prestige speed;
Ii) front camera (5) should be positioned at model front, and its center of lens axis answers parallel model to indulge midship section, and the parallel water surface, side camera (11) should be positioned at grid side, model side, and its center of lens axis line answers vertical mould to indulge midship section, record the measurement parameter that each camera is relevant, and camera synchronization photograph control device should be able to keep before, side two camera substantially can sync pulse jamming;
Iii) background grid (15) is arranged on seaworthiness instrument (12), and be positioned at single hull model (1) rear, background grid (15) answers vertical mould to indulge midship section, and ensures that background grid (15) does not produce obviously to rock in process of the test and avoid affecting result precision;
Iv) obliquity sensor (9) and position transducer (10) are respectively used to model trim angle and model center of gravity place's heave value in acquisition test, obliquity sensor (9) is arranged on single hull model (1), and position transducer (10) is arranged on seaworthiness instrument (12);
C) water surface flying device splash list hull model basin test:
Put into the required counterweight of test in unloader box in discharge mechanism (16) after, hydrodynamic force high-speed test (HST) acting trailer system (17) pulls single hull model and moves on the water surface when moving in orbit, after trailer accelerates to reach the travelling speed of testing requirements, continue to keep trailer travelling speed to be stabilized in the minimum variation range of this towed speed, record now trailer speed and placing an order hull model attitude angle in this towed speed, center of gravity heave value, and camera (5) before using, side camera (11) respectively in the past, taking pictures of model sport state and spraying state is synchronously carried out in direction, side two, after off-test, experimental data processing personnel are by corresponding trystate, in the past the photo of camera reads splash peak dot projection coordinate y respectively
1, z
1, and read splash peak dot projection coordinate x from the photo of synchronous side camera
1through converting, obtain splash peak dot coordinate x, y and the z relative to keel place faulted-stage, by splash peak dot coordinate x, y and z value under each speed, draw splash envelope, availability deciding is carried out to the raw data of collecting, reject fail data, the data of test data and expection are compared, the validity and reliability of preliminary judgement result, analyzing and processing is carried out to abnormal data, provides result.
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