CN104020007A - Large simulation test system for simulating combined effects of earthquakes, waves and ocean current - Google Patents
Large simulation test system for simulating combined effects of earthquakes, waves and ocean current Download PDFInfo
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Abstract
The invention discloses a large simulation test system for simulating combined effects of earthquakes, waves and ocean current, belonging to the technical field of a marine structure power test. The simulation test system comprises a test wave gutter channel, an absorption wave-maker device, a test water circulating device, an adjustable speed block platform, an earthquake simulation device, a two-way flow simulation device and a waterproof sealing device, wherein the upper plane of a vibration table body of the earthquake simulation device is parallel and level to the bottom plane of the test wave gutter channel; the waterproof sealing deice is arranged between the periphery of the upper plane of the vibration table body and the bottom plane of the test wave gutter channel; the absorption wave-maker device is arranged at the initial end of the test wave gutter channel; a flow making pump of the two-way flow simulation device is connected with an initial-end flow equalizing box and a tail-end flow equalizing box through a pipeline. The system is complete in test simulation function, different input excitation test conditions of the marine structure under combined effects of various loads can be simulated, the test simulation of the earthquakes, the waves and the ocean current is in full-digital control, and the large simulation test system is high in control accuracy and diverse in test function.
Description
Technical field
The present invention relates to a kind of simulated earthquake, wave, the symphyogenetic large scale mock up test system of ocean current, belong to ocean structure dynamic experiment technical field.
Background technology
The primary load that the building structures such as offshore oil production drilling platform, man-made island, harbour, nuclear power station are subject to is the disasteies such as wave, trend, earthquake, sea ice and strong storm.Especially, in the time that several in above-mentioned disaster occur simultaneously, larger to the security threat of large scale structure, the disaster causing is also more serious; Due to the complicacy of wave, trend, earthquake, so far the experimental study of said structure is limited in respectively to hydrodynamics test and only studies ripple, flow and carry out shock test research for the impact of aouatic structure and on plane bench to solve the individual event research state such as breakoff phenomenon and the simulation of mechanism of large scale structure under geological process.Obviously there is following problem in above several test method:
1, aouatic structure not only bears Earthquake Inertia Force Acting under seismic loading, and also has the additional loads such as flowing pressure at the surface in contact of structure and water body, the problem of modelling of the solid coupling of stream when traditional earthquake simulation equipment can not solve earthquake.
2, be that independent hydrodynamics is tested or earthquake simulation test all can not solve the synergy problem of modelling of the loads such as wave, trend, earthquake for structure,
3, at China's Bohai Sea Gulf periphery, no matter win, huge port or Liaohe Oil Field, its offshore drilling platform is all likely subject to the threat of sea ice in the winter time, more lacks and can realize the symphyogenetic simulated test facility of wave, trend, earthquake and sea ice in research technique before.
Summary of the invention
For solving the problem existing in existing research technique and technology, the present invention proposes a kind of simulated earthquake, wave, the symphyogenetic large scale mock up test system of ocean current.This simulation experiment system should be able to be simulated the different input stimulus operating condition of test of ocean structure under various load synergy, and the test simulation of earthquake, wave, ocean current is digital control, and control accuracy is high, test function is various.
The present invention for addressing the above problem adopted technical scheme is: a kind of simulated earthquake, wave, the symphyogenetic large scale mock up test system of ocean current, it comprises test wave current tank, absorption wave making machine device, test water circle device and adjustable speed coaster platform, and it also comprises earthquake simulator, bidirectional flow analogue means and water proof packoff; The head end below of described test wave current tank is provided with head end current-sharing case, and tail end below is provided with tail end current-sharing case, on test wave current tank, across an adjustable speed coaster platform, is provided with melt pit in the center of test wave current bottom of gullet; Described earthquake simulator is arranged in melt pit, the upper plane of the vibration stage body of earthquake simulator keeps concordant with the baseplane of test wave current tank, on vibration stage body, between the periphery of plane and the baseplane of test wave current tank, be provided with described water proof packoff, the catch pit that is arranged in melt pit bottom is provided with unwatering pump; Described absorption wave making machine device is arranged on the head end in test wave current tank, and head end and both sides in test wave current tank are provided with vertical type energy dissipating absorption mesh, and tail end is provided with tilting energy dissipating absorption mesh; Described bidirectional flow analogue means is arranged on a side of test wave current tank head end, and the stream pump of making of bidirectional flow analogue means is connected with head end current-sharing case and tail end current-sharing case by pipeline; Described test water circle device is arranged on a side of test wave current tank tail end, and the undercurrent pump that is arranged in circulating water pool is connected with test wave current tank by pipeline.
Described earthquake simulator adopts hydraulic-driven, control electric signal and zoom into hydraulic pressure signal by three stage servovalve conversion, and control the horizontal actuator of shaking table body side surface and vibrate the vertical actuator vibration of stage body below, the below center position of vibration stage body is provided with a static pressure support air bag, both sides are provided with lateral slip and support, and are furnished with the accumulator of buffering hydraulic device oil shock in melt pit.
Described absorption wave making machine device adopts servomotor on line slideway, to be driven and made ripple push pedal by ball-screw.
The stream pump of making of described bidirectional flow analogue means adopts two connecting hoses to be connected with head end current-sharing case and tail end current-sharing case respectively by pipeline, above head end current-sharing case, be provided with and test the head end that wave current tank is communicated with and go out head piece and head end trash rack, above tail end current-sharing case, be provided with and test the tail end that wave current tank is communicated with and go out head piece and tail end trash rack.
Described water proof packoff is superimposed as double-deck ring seal structure upper strata O-ring seal and lower floor's O-ring seal, adopt O-ring seal pressing plate and sealed screw that the Inner of double-deck ring seal structure ring limit is fixed on the upper periphery of vibration stage body, the outer annular edge of double-deck ring seal structure is fixed on the bottom surface of test wave current tank.
The invention has the beneficial effects as follows: this simulated earthquake, wave, the symphyogenetic large scale mock up test system of ocean current comprise test wave current tank, absorption wave making machine device, test water circle device, adjustable speed coaster platform, earthquake simulator, bidirectional flow analogue means and water proof packoff.The upper plane of the vibration stage body of earthquake simulator keeps concordant with the baseplane of test wave current tank, on vibration stage body, between the periphery of plane and the baseplane of test wave current tank, be provided with described water proof packoff, absorption wave making machine device is arranged on the head end in test wave current tank, and the stream pump of making of bidirectional flow analogue means is connected with head end current-sharing case and tail end current-sharing case by pipeline.This system test analog functuion is complete, can simulate the different input stimulus operating condition of test of ocean structure under various load synergy, and the test simulation of earthquake, wave, ocean current is digital control, and control accuracy is high, test function is various.
Brief description of the drawings
Fig. 1 is the structure vertical view of a kind of simulated earthquake, wave, the symphyogenetic large scale mock up test system of ocean current.
Fig. 2 is the C-C cut-open view of Fig. 1.
Fig. 3 is the A-A cut-open view of Fig. 1.
Fig. 4 is B-B cut-open view in Fig. 1.
Fig. 5 makes flow structure basis vertical view in Fig. 1.
Fig. 6 is C-C cross-section structure in Fig. 1.
In figure: 1, earthquake simulator, 1a, vibration stage body, 1b, horizontal actuator, 1c, vertical actuator, 1d, test wave current tank, 1e, lateral slip support, 1f, model fixing threaded hole, 1g, tank base plate; 1h, accumulator, 1i, oil return case, 1j, dump pump, 1k, cover plate, 1n, melt pit, 1m, static pressure support air bag; 2, absorption wave making machine, 2a, line slideway, 2b, wave making machine basis, 2c, servomotor, 2d, make ripple push pedal, 2e, vertical type energy dissipating absorption mesh, 2f, tilting energy dissipating absorption mesh; 3, bidirectional flow analogue means, 3a, buncher, 3b, make stream pump, 3c, tail end current-sharing case, 3d, mozzle, 3e, catch pit, 3f, connecting hose, 3g, tail end go out head piece, and 3h, head end go out head piece, 3i, head end trash rack, 3j, tail end trash rack, 3k, head end current-sharing case, 3r, barrier sheet, 3m, make stream pump foundation, 3n, embedding anchor bolts hole, 3o, removable cover, 3p, blinding layer, 3q, Zao Liu cavern; 4, water proof packoff, 4a, upper strata O-ring seal, 4b, lower floor's O-ring seal, 4c, catch pit, 4d, O-ring seal pressing plate, 4e, sealed screw, 4f, unwatering pump; 5, test water circle device, 5a, inlet valve, 5b, water discharging valve, 5c, mozzle, 5d, undercurrent pump, 5e, circulating water pool, 5f, pump platform; 6, work coaster platform, 6a, line slideway, 6b, square steel backing plate, 6c, walking rack, 6d, walking driven wheel, 6e, travel driving motor, 6f, reductor, 6g, walking control desk, 6h, running wheel, 6i, staircase.
Embodiment
Fig. 1,2 shows the structural drawing of a simulated earthquake, wave, the symphyogenetic large scale mock up test system of ocean current.In figure, simulated earthquake, wave, the symphyogenetic large scale mock up test system of ocean current comprise test wave current tank 1d, absorption wave making machine device 2, test water circle device 5, adjustable speed coaster platform 6, earthquake simulator 1, bidirectional flow analogue means 3 and water proof packoff 4.The head end below of test wave current tank 1d is provided with head end current-sharing case 3k, and tail end below is provided with tail end current-sharing case 3c, on test wave current tank 1d, across an adjustable speed coaster platform 6, is provided with melt pit 1n in the center of test wave current tank 1d bottom.Earthquake simulator 1 is arranged in melt pit 1n, the upper plane of the vibration stage body 1a of sub-elliptical keeps concordant with the baseplane of test wave current tank 1d, on vibration stage body 1a, between the periphery of plane and the baseplane of test wave current tank 1d, be provided with described water proof packoff 4, the catch pit 4c that is arranged in melt pit 1n bottom is provided with unwatering pump 4f.Absorption wave making machine device 2 is arranged on the head end in test wave current tank 1d, and head end and both sides in test wave current tank 1d are provided with vertical type energy dissipating absorption mesh 2e, and tail end is provided with tilting energy dissipating absorption mesh 2f.Bidirectional flow analogue means 3 is arranged on a side of test wave current tank 1d head end, and the stream pump 3b that makes of bidirectional flow analogue means 3 is connected with head end current-sharing case 3k and tail end current-sharing case 3c by pipeline.Test water circle device 5 is arranged on a side of test wave current tank 1d tail end, and the undercurrent pump 5d that is arranged in circulating water pool 5e is connected with test wave current tank 1d by pipeline.
Below the servo earthquake simulator of electricity-liquid, absorption wave making machine device, bidirectional flow analogue means, water proof packoff, test water circle device, adjustable speed coaster platform are done to introduce respectively:
1. the servo earthquake simulator of electricity-liquid
Fig. 1,2 shows the servo earthquake simulator of electricity-liquid.For carrying out the dynamic model test of aouatic structure, around it, have test wave current tank 1d, structural model can be placed in the middle of water environment.Earthquake simulator adopts displacement, speed, acceleration tri-consult volume control feedback system to realize the electronic digit control of shaking table motion; Device adopts hydraulic-driven, controls electric signal and zooms into hydraulic pressure signal by three stage servovalve conversion, and control each actuator and complete vibratory drive.Its horizontal actuator 1b and vertical actuator 1c direction actuator are placed in the melt pit 1n at device middle part, and the hydraulic oil of finishing the work is collected by oil return case 1i, and automatic liquid surface control unit controls dump pump 1j oil return is to oil pressure source; Separately have static pressure support air bag 1m to be placed in center, vibration stage body below, in the time of the high load operation of device, bearing stage body and model gravity or Vertical Static load has enough power output to ensure vertical actuator 1c; In melt pit, be furnished with the oil shock of accumulator 1h with buffering hydraulic device; For preventing from contacting the stage body surface metal parts corrosion of water body, vibration stage body 1a, O-ring seal pressing plate 4d, horizontal actuator upper cover plate 1k and whole set bolts etc. all adopt 410 stainless steel materials to make.For assurance device working oil temperature, oil pressure source is furnished with cooling water circulating device, temperature control valve is installed in cooling water circulating device and can starts when oil temperature higher than warning in oil temperature to ensure cooling device, to avoid causing device wearing and tearing because cooling device operation too early causes the long-term cold operation of hydraulic means.
2. absorption wave making machine device
Fig. 1,2 also shows absorption wave making machine device.This device adopts servomotor 2c to drive ball-screw to drive push-plate type to make wave structure.Wave making machine is arranged on the head end of test wave current tank 1d, is made up of parts such as making ball-screw, servomotor 2c, servo power supply, motion control card, A/D interface and computing machine and peripheral hardware in ripple push pedal 2d, line slideway 2a.
Absorption wave making machine is equipped with secondary counter ejected wave absorption plant; This device adopts vertical type energy dissipating absorption mesh 2e at test wave current tank 1d head end, and tail end adopts tilting energy dissipating absorption mesh 2f, and tank two side is also furnished with vertical type energy dissipating absorption mesh 2e, and eliminates with this surge echo that tank end wall produces.
Absorption wave making machine wave making machine adopts approximant computer control mode to complete wave spectrum iteration, the wave spectrum producing when ensureing Random Wave simulation test with expect that spectrum approaches or consistent.
3. bidirectional flow analogue means
Fig. 1,2 also shows bidirectional flow analogue means.This device adopts 1 to make stream pump 3b outfit reversible variable frequency power supply, at bottom of gullet, head end current-sharing case 3k, tail end current-sharing case 3c are set, connect and compose circulation flow path by mozzle 3d, connecting hose 3f therebetween, connect two ends current-sharing case and make stream pump, can produce two-way flow field by computer controlled automatic buncher 3a; Also can manually control generation steady flow condition.Make the forward current of stream pump 3b generation and eliminate turbulent flow through head end current-sharing case 3k, go out head piece 3h by head end again and form tank flow field, current go out head piece 3g and enter tail end current-sharing case 3c through the experimental tank tail end of flowing through, return and make stream pump 3b and form closed flow field through mozzle 3d, or flow in the other direction and form closed flow field; For preventing that foreign material from entering current-sharing case, be respectively arranged with head end trash rack 3i and tail end trash rack 3j at the initial and end two ends of test wave current tank 1d; Fig. 3 is illustrated in head end current-sharing case 3k and mozzle 3d connecting portion arranges barrier sheet 3r, to prevent water body seepage in case.Buncher, make stream pump and be placed in the 3q of Zao Liu cavern, be fixed on that shown in Fig. 5, to make stream pump foundation 3m upper by foot bolt, for ease of maintenance, top, Zao Liu cavern arranges removable cover 3o, in the 3q of Zao Liu cavern, is also provided with catch pit 3e.
4. water proof packoff
Fig. 1,2 shows the distinctive water proof packoff of this Combined Trials analogue means.This device separates electrical equipment and space in water body and melt pit in test wave current tank 1d, to ensure that the devices such as unwatering pump 4f in accumulator 1h in melt pit 1n, horizontal actuator 1b, vertical actuator 1c, static pressure support air bag 1m, dump pump 1j, catch pit 4c are operated in without in hydrospace.For ensureing water proof sealing effectiveness, this device adopts double-deck water proof O-ring seal scheme.Fig. 6 is given in shaking table and the partial enlarged drawing that is fixedly connected with upper strata O-ring seal 4a, the O-ring seal 4b of lower floor around between cell body basis, upper strata is connected and fixed on respectively between vibration stage body 1a and tank base plate 1g by O-ring seal pressing plate 4d, sealed screw 4e and special seal gum every O-ring seal 4b every O-ring seal 4a and lower floor, two-layer water proof O-ring seal all adopts ocean elastomeric material to make, its tension resistance to spalling is higher than 20MPa, the anti-aging cycle is not less than 10 years, adopt entirety sulfuration shortening moulding process, between two-layer water proof O-ring seal, leave necessary gap.
For ensureing that in process of the test two-layer water proof O-ring seal all occurs destroying in the least favorable situation of leaking water level in melt pit 1n and can not flood horizontal actuator 1b, servo-valve on vertical actuator 1c, static pressure support air bag 1m air pump ECU (Electrical Control Unit), the appliance circuits such as dump pump 1j and control module, in melt pit, be provided with catch pit 4c, in hole, be placed with unwatering pump 4f, and is furnished with water level control module, once catch pit 4c internal water accumulation reaches warning line, level detecting device will be opened undercurrent pump 4f, to leak and pump melt pit and enter testing laboratory's drainage arrangement, in the time that catch pit 4c internal water accumulation is reduced to below safety level lower limit, level detecting device will close and stop unwatering pump 4f, normally move work with warranty test device.
5. test water circle device
Fig. 1 shows the distinctive test water circle device of this Combined Trials analogue means.Outside laboratory, have a underground water storage circulating water pool 5e, its one end is connected with test wave current tank 1d through inlet valve 5a, water discharging valve 5b with two mozzle 5c, other end water inlet pipe is direct-connected in circulating water pool 5e through undercurrent pump 5d, drainpipe, for preventing that the dirts such as the precipitation silt in circulating water pool 5e are pumped into test wave current tank 1d and current-sharing case, undercurrent pump 5d is placed on the pump platform 5f in circulating water pool 5e.Undercurrent pump discharge should be able to ensure that water circle device injects in tank by water and reaches the highest designated water level of test within the suitable time.
6. adjustable speed coaster platform
Adopt rack and pinion drive mechanism at the coaster platform shown in Fig. 1,2, on test wave current tank 1d bis-sidewalls, a square steel backing plate 6b is respectively set, respectively on square steel backing plate 6b fix a line slideway 6a, respectively in two line slideway 6a sides fix a walking rack 6c, travel driving motor drives the walking driven wheel 6d engaging with walking rack 6c through reductor 6f.On walking control desk 6g, adopt variable frequency control mode control coaster platform direction of travel and speed.The Main Function of coaster platform has two: the first facilitates testing crew on coaster platform, lay instrument and carry out Test Data Collecting; Its two, coaster platform utilizes adjustable speed and tuning function towing can ice to simulate sea ice the power of structure is pushed to the ice the causing use of bestirring oneself to complete.Testing crew is by the upper lower block platform of staircase 6i.
Use the method for work of above-mentioned earthquake, wave, ocean current synergy simulation experiment system to comprise the following steps:
(a) install, debugged test model
This link should comprise structural model installation, input seismic event or random wave control iteration; Testing ripple gathers warranty test such as spectrum iteration etc. and can reach the preliminary preparation of setup control index;
(b) in simulation test device tank, inject recirculated water
This work is to prepare for introduce test water body to tank, first ON cycle water inlet valve; Should check whether recirculated water water discharging valve closes to ensure the efficiency of intaking simultaneously.Then the undercurrent pump in ON cycle pond cuts out recirculated water undercurrent pump and cuts out recirculated water inlet valve in the time that combined simulation test unit tank middle water level arrives test setting height;
(c) open earthquake simulator ECU (Electrical Control Unit) and hydraulic pressure unit, carry out device preheating
Hydraulic means working temperature, higher than room temperature, therefore, need be carried out preheating to vibration platform apparatus, meanwhile, with low frequency displacement signal, vibration platform apparatus is slowly moved with to parts putting maintenance into practice operations such as solenoid valve, side hydraulic supports, makes the abundant preheating of device.Device, fully normally working after preheating, can extend its serviceable life valuably again;
(d) open absorption wave making machine and unlatching bidirectional flow analogue means ECU (Electrical Control Unit)
Wave making machine with make stream device do not need preheating operation, therefore, after vibration platform apparatus preheating, open ECU (Electrical Control Unit) under water;
(e) simulation test that links is opened the interlock electronic digit control device of earthquake, wave, water flow simulation test, formally starts linkage test, should note the oil temperature of hydraulic means in process of the test, starts if desired its cooling device and ensures that oil temperature is constant;
(f) close down earthquake, wave, water flow simulation test unit
Close successively control program software and each ECU (Electrical Control Unit) of earthquake simulator, bidirectional flow analogue means, absorption wave making machine device;
(g) send the water body in combined simulation test unit tank back to underground aqua storage tank
ON cycle water drainage valve, can utilize drop between experimental tank and circulating water pool that water body in experimental tank is put back to circulating water pool.
Claims (5)
1. a simulated earthquake, wave, the symphyogenetic large scale mock up test system of ocean current, it comprises test wave current tank (1d), absorption wave making machine device (2), test water circle device (5) and adjustable speed coaster platform (6), it is characterized in that: it also comprises earthquake simulator (1), bidirectional flow analogue means (3) and water proof packoff (4); The head end below of described test wave current tank (1d) is provided with head end current-sharing case (3k), tail end below is provided with tail end current-sharing case (3c), upper across an adjustable speed coaster platform (6) at test wave current tank (1d), be provided with melt pit (1n) in the center of test wave current tank (1d) bottom; Described earthquake simulator (1) is arranged in melt pit (1n), the upper plane of the vibration stage body (1a) of earthquake simulator (1) keeps concordant with the baseplane of test wave current tank (1d), between the periphery of the upper plane of vibration stage body (1a) and the baseplane of test wave current tank (1d), be provided with described water proof packoff (4), the catch pit (4c) that is arranged in melt pit (1n) bottom is provided with unwatering pump (4f); Described absorption wave making machine device (2) is arranged on the head end in test wave current tank (1d), and head end and both sides in test wave current tank (1d) are provided with vertical type energy dissipating absorption mesh (2e), and tail end is provided with tilting energy dissipating absorption mesh (2f); Described bidirectional flow analogue means (3) is arranged on a side of test wave current tank (1d) head end, and the stream pump (3b) of making of bidirectional flow analogue means (3) is connected with head end current-sharing case (3k) and tail end current-sharing case (3c) by pipeline; Described test water circle device (5) is arranged on a side of test wave current tank (1d) tail end, and the undercurrent pump (5d) that is arranged in circulating water pool (5e) is connected with test wave current tank (1d) by pipeline.
2. a kind of simulated earthquake according to claim 1, wave, the symphyogenetic large scale mock up test system of ocean current, it is characterized in that: described earthquake simulator (1) adopts hydraulic-driven, control electric signal and zoom into hydraulic pressure signal by three stage servovalve conversion, and control the horizontal actuator (1b) of vibration stage body (1a) side and vibrate vertical actuator (1c) vibration of stage body (1a) below, the below center position of vibration stage body (1a) is provided with a static pressure support air bag (1m), both sides are provided with lateral slip and support (1e), in melt pit (1n), is furnished with the accumulator (1h) of buffering hydraulic device oil shock.
3. a kind of simulated earthquake according to claim 1, wave, the symphyogenetic large scale mock up test system of ocean current, is characterized in that: described absorption wave making machine device (2) adopts servomotor (2c) to make ripple push pedal (2d) by ball-screw upper driving of line slideway (2a).
4. a kind of simulated earthquake according to claim 1, wave, the symphyogenetic large scale mock up test system of ocean current, it is characterized in that: the stream pump (3b) of making of described bidirectional flow analogue means (3) adopts two connecting hoses (3f) to be connected with head end current-sharing case (3k) and tail end current-sharing case (3c) respectively by pipeline, be provided with in the top of head end current-sharing case (3k) and test the head end that wave current tank (1d) is communicated with and go out head piece (3h) and head end trash rack (3i), be provided with in the top of tail end current-sharing case (3c) and test the tail end that wave current tank (1d) is communicated with and go out head piece (3g) and tail end trash rack (3j).
5. a kind of simulated earthquake according to claim 1, wave, the symphyogenetic large scale mock up test system of ocean current, it is characterized in that: described water proof packoff (4) is superimposed as double-deck ring seal structure upper strata O-ring seal (4a) and lower floor's O-ring seal (4b), adopt O-ring seal pressing plate (4d) and sealed screw (4e) that the Inner of double-deck ring seal structure ring limit is fixed on the upper periphery of vibration stage body (1a), the outer annular edge of double-deck ring seal structure is fixed on the bottom surface of test wave current tank (1d).
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