CN105547711A - Motorcycle acceleration fatigue durability test method based on road simulation stand - Google Patents
Motorcycle acceleration fatigue durability test method based on road simulation stand Download PDFInfo
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to the field of motorcycle performance testing, and especially relates to a motorcycle acceleration fatigue durability test method. The motorcycle acceleration fatigue durability test method based on a road simulation stand. An object load rain flow distribution matrix is obtained by acquiring a road spectrum of a user actual driving road, and a road spectrum of each reinforcement damage road is obtained through an actual driving test; data processing is performed on the road spectrums of reinforced roads and final driving signals are obtained through iteration on the stand; and simulation road spectrums of the reinforced roads are obtained through testing a motorcycle by use of the final driving signals, then through adjusting weight coefficients and combination of the driving signals of each road, complete driving signals are obtained, and a fatigue durability test result of the motorcycle in a full-life period is obtained through performing a fatigue durability test on the motorcycle on the road simulation stand by use of the complete driving signals. According to the invention, the road spectrums are further processed and iterated and the simulation road spectrums are obtained reversely so that the test period can be substantially shortened, the test efficiency is improved, the test cost is reduced, and the test safety is improved.
Description
Technical field
The present invention relates to Motorcycle Performance field tests, particularly relate to a kind of motorcycle fatigue endurance test method.
Background technology
The fatigue endurance performance of motorcycle is an important indicator in overall performance, directly related with the average annual cost of motorcycle life cycle; Be carry out in real roads mostly to motorcycle fatigue durability testing in prior art, the torture test based on road is very consuming time, and experimentation cost is also very high.In order to reduce testing cost, occurred the long duration test stand of simulated roadway, relative to actual road test, bench test has obviously advantage, the two relatively in table 1.Because actual road test needs driver, affect by weather conditions, test period is often difficult to control, and experimental enviroment is also usually change, and the observation of test findings also exists inconvenience.Comparatively speaking, bench test is easy to control, quicker, reproducible.In addition, the security of motorcycle is poorer relative to automobile, and therefore, motorcycle adopts stand to carry out the safety that fatigue endurance test can also ensure tester.
| Actual road test | Bench test | |
| Controlling test | Manually | Automatic control |
| Test period | Discontinuous | Round-the-clockly to carry out continuously |
| Experimental enviroment | Environment is change | Environment is controlled, reproducible |
| Test findings | Not easily discover | Destruction situation is easily found |
| Trial stretch | Car load | Car load, subsystem, parts |
| Scenario simulation | Actual tests scene | Can be stacked up multiple severe scene synchronism detection |
| Accelerated test | Can not compress | Accelerated test can be realized |
Table 1 actual road test and bench test characteristic comparing
Abroad with regard to starting, fatigue endurance test technology being studied at the beginning of last century, being mainly used in automobile research and development field.In early days, fatigue endurance test is carried out mainly through actual road surface.The twenties in last century, the U.S. builds military testing field, Aberdeen, and subsequently, oneself endurancing field built by general, Ford etc. in Michigan, endurancing road comprises broken stone road, sand road, old-fashioned rural dirt road, distortion road etc., for carrying out the harshest test to auto parts and components.
1962, American MTS company manufactured First 4 passage tire manifold type trap for automobile simulation test machine in the world, and indoor are moved in long duration test.From then on, hydraulic servo actuator is introduced into automobile long duration test, and the repeatability of test is greatly improved.1974, American MTS company invention RPC experimental technique, brought a brand-new developing stage into by Road Simulation Test technology.
In China, each large Automobile Enterprises from the beginning of the eighties in last century successively Introduced From Abroad road analogy stand carry out car load and parts fatigue endurance test research.At present, Road Simulation Test technology is used widely in vehicle complete vehicle and parts test, and coefficient of intensification reaches more than 10 times.Road analogy mainly completes on the road simulator stand frame of 16 passages, and simulative iteration realizes based on wheel force, and testing equipment and experimentation cost are very expensive, and every wheel force is up to RMB100 ten thousand yuan.
But in motorcycle research and development field, it is relatively less that fatigue endurance test research carried out by application road analogy stand.TVS motor corporation of India have extensively studied life prediction and the structure optimization of motorcycle relevant elements, and has carried out experimental study by MTS test-bed.Vehicle detection center, Taiwan (ATRC), has carried out accelerated fatigue test research to parts such as handlebar, the support of motorcycle.There is a set of MTS two passage tire coupling road simulator stand in Chongqing University of Technology, expands and cooperates for many years, in the bench test of motorcycle fatigue endurance, virtual test etc., carried out desk study with Jiangling, Longxin.Obviously, the actual loading situation of full simulation motorcycle is all failed in these researchs.Relatively find, the load of motorcycle impression is obviously different from automobile: four vibroshocks of automobile are substantially perpendicular to the ground, and four wheels mainly encourage by vertical load; And the front and back damping of motorcycle is tilted, main by vertical load and longitudinal loading.It should be noted that, the pertinent literature that the scholar of Chongqing University of Technology delivers is all the road simulator stand based on two passages, therefore, all cannot the actual loading situation of simulated motorcycle exactly, the fatigue endurance test effect consistent with actual road test cannot be obtained.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of motorcycle based on road analogy stand and accelerates fatigue endurance test method, the method adopts the motorcycle road simulator stand of four-way based on the motorcycle of the road analogy stand endurance test method that accelerates fatigue, can the true force-bearing situation of accurate simulation motorcycle, the puppet damage of simulation is composed as road by the acceleration signal of four-way, in order to improve simulation precision, and shorten the test period, spectrum of satisfying the need has done further process and iteration, and oppositely obtain simulation road spectrum reduction test error with the drive singal after iteration, solve the actual road test cycle long, cost is high, efficiency is low, the shortcomings such as poor stability.
The present invention is achieved in that a kind of motorcycle based on road analogy stand accelerates fatigue endurance test method, the road spectrum of targeted customer's actual travel road of motorcycle is obtained by actual test-drive, rain flow method statistics load cycle number is adopted to the road spectrum of actual travel road, obtain the target load rain stream distribution matrix of targeted customer's actual travel road, carry out simulation test according to following steps;
S1: the strengthening damage section that several type is set;
S2: the road spectrum being obtained each strengthening damage section by actual test-drive;
S3: be placed to by motorcycle on road analogy stand and test, carries out iterative respectively to the road spectrum in each strengthening damage section and obtains final drive singal;
The detailed process of described iterative is first test motorcycle with white noise signal, obtains the transport function of road analogy platform system; Then load road spectrum as the Expected Response signal needed for test, according to transport function and Expected Response signal, utilize the method for matrix inversion to try to achieve initial driving signal; Iterate finally by test and revise initial driving signal gradually, thus obtain the final drive singal in each strengthening damage section;
S4: motorcycle is placed on road analogy stand and utilizes final drive singal to carry out testing the simulation road spectrum obtaining each strengthening damage section;
S5: rain flow method statistics load cycle number is adopted to the simulation road spectrum in each strengthening damage section, obtains the strengthening load rain stream distribution matrix in each strengthening damage section;
S6: the strengthening load rain stream distribution matrix mixing each strengthening damage section according to certain scale-up factor obtains total rain stream distribution matrix, solved by minimum value and make total rain stream distribution matrix and the equivalence of target load rain stream distribution matrix, obtain the scale-up factor in each strengthening damage section;
S7: the scale-up factor in each strengthening damage section and final drive singal are combined, be compiled into a complete drive singal, road analogy stand carries out fatigue endurance test with complete drive singal to motorcycle, obtains the fatigue endurance test result in motorcycle life cycle management.
The concrete acquisition pattern of described road spectrum is first install vibration transducer respectively at the axle spindle nose of motorcycle, when motorcycle driving, and the signal that vibration transducer gathers and road spectrum.
The signal of described vibration transducer collection gets vertical and longitudinal signal configuration acceleration four-matrix as road spectrum signal.
Described strengthening damage section includes but not limited to following 11 kinds: washboard road, Block Road, pebble path, sandy beach road, fish-scale pit road, rectangular slab of stone road, bituminous road, muddy and ruthed lane, cement road, waveform road, abrupt slope road.
Also comprise in described step S2 and compose to the road in each strengthening damage section the step processed, the process of spectrum of satisfying the need comprises average, removes anomaly peak point, filtering, the little value of removal.
The mode of described removal anomaly peak point is adopt the method arranging amplitude thresholding to remove anomaly peak point, and to obtain real road spectrum, amplitude thresholding is set to 3 ~ 6 times of mean square deviations.
Described being filtered into adopts low-pass filter to carry out filtering.
Signal value, for arranging removal amplitude, is less than the signal removing amplitude and removes, remove amplitude and be set as 5% ~ 10% of signal maximum by the little value of described removal.
In described step S6 each strengthening damage section scale-up factor specifically the mode of trying to achieve be,
First, target load rain stream distribution matrix is designated as
The strengthening load rain stream distribution matrix in each strengthening damage section is designated as X
i, i=1,2,3 ... n,
The scale-up factor of mixing is designated as A
i, i=1,2,3 ... n, obtains
In formula, X
iit is the strengthening load rain stream distribution matrix in i-th kind of strengthening damage section;
A
ibe the scale-up factor in i-th kind of strengthening damage section, i.e. hybrid weight coefficient;
Then, the minimum value of Y is asked by constraint condition 1,2, namely
Condition 1: scale-up factor A
ifor integer, i=1,2,3 ... n;
Condition 2: after mixing, section total length is the shortest, i.e. requirement
value minimum, in formula, S
ibe the length in i-th kind of strengthening damage section, i=1,2,3 ... n.
The motorcycle that the present invention is based on road analogy stand endurance test method that accelerates fatigue adopts the motorcycle road simulator stand of four-way, can the true force-bearing situation of accurate simulation motorcycle, the puppet damage of simulation is composed as road by the acceleration signal of four-way, in order to improve simulation precision, and shorten the test period, spectrum of satisfying the need has done further process and iteration, and oppositely obtains simulation road spectrum reduction test error with the drive singal after iteration; Adopt rain flow method statistics load cycle number, draw the rain stream distribution matrix of different kinds of roads, consider average and cyclic loading size simultaneously, easier relative to foil gauge measuring method, more easily realize; Generally speaking this method can shorten the test period significantly, improves test efficiency, reduce experimentation cost, improves experimental safe.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's statement.
Embodiment 1
A kind of motorcycle based on road analogy stand accelerates fatigue endurance test method, the road spectrum of targeted customer's actual travel road of motorcycle is obtained by actual test-drive, rain flow method statistics load cycle number is adopted to the road spectrum of actual travel road, obtain the target load rain stream distribution matrix of targeted customer's actual travel road, target load rain stream distribution matrix considers average simultaneously and cyclic loading size makes analog reslt more accurate, carries out simulation test according to following steps;
Road spectrum described in the present invention is the acceleration signal of motorcycle, concrete obtain manner is, respectively vibration transducer is installed at the axle spindle nose of motorcycle, when motorcycle driving, the signal that vibration transducer gathers and road spectrum, described vibration transducer is three-dimensional acceleration transducer, the vibration acceleration signal in axle three directions can be measured, comparatively speaking, the accekeration of the side direction of motorcycle is very little, therefore as preferred, in the present embodiment, only select vertical and longitudinal acceleration signal as road spectrum signal, structure acceleration four-matrix;
Simulation test is carried out according to following steps;
S1: the strengthening damage section that several type is set; In the present embodiment, described strengthening damage section has 11 kinds, is respectively washboard road, Block Road, pebble path, sandy beach road, fish-scale pit road, rectangular slab of stone road, bituminous road, muddy and ruthed lane, cement road, waveform road, abrupt slope road;
S2: the road spectrum being obtained each strengthening damage section by actual test-drive;
In the road spectrum test obtaining each strengthening damage section, different speeds of operation is respectively provided to various enhanced road surface, laboratory technician drives on request, consider the difference between different driver and average needs, generally at least measure 9 groups of data, then sort according to injury vector, get the road spectrum of median.Segmentation is carried out to the road spectrum signal recorded, needs the signal with reference to transition section, and carry out in conjunction with GPS positioning signal; And then spectrum of satisfying the need processes, treatment step comprises average, removes anomaly peak point, filtering, the little value of removal;
Wherein, anomaly peak point is not the collection signal of actual needs, mainly owing to measuring, record, interference in transfer process or transient error cause, a handstone on such as road surface just may bring interference, and anomaly peak point is often much bigger than normal signal, can bring comparatively big error to result, must be rejected, adopt the method that amplitude thresholding is set to remove, to obtain real road spectrum, generally amplitude thresholding is set to 3 ~ 6 times of mean square deviations;
Filtering adopts low-pass filter to carry out filtering, and according to signal analysis, the signal higher than 80Hz belongs to the vibration signal of engine, very little to fatigue damage contribution, can filtering;
In order to realize accelerated test, also need to remove undamaged a small amount of, at this moment, removal amplitude is set, signal value is less than the signal removing amplitude and removes, remove amplitude and be set as 5% ~ 10% of signal maximum;
S3: be placed to by motorcycle on road analogy stand and test, carries out iterative respectively to the road spectrum in each strengthening damage section and obtains final drive singal;
The detailed process of described iterative is first test motorcycle with white noise signal, obtains the transport function of road analogy platform system; Then load road spectrum as the Expected Response signal needed for test, according to transport function and Expected Response signal, utilize the method for matrix inversion to try to achieve initial driving signal; Iterate finally by test and revise initial driving signal gradually, thus obtain the final drive singal in each strengthening damage section;
S4: motorcycle is placed on road analogy stand and utilizes final drive singal to carry out testing the acceleration road spectrum measuring spindle nose place before and after motorcycle, obtain the simulation road spectrum in each strengthening damage section;
S5: rain flow method statistics load cycle number is adopted to the simulation road spectrum in each strengthening damage section, obtains the strengthening load rain stream distribution matrix in each strengthening damage section;
S6: the strengthening load rain stream distribution matrix mixing each strengthening damage section according to certain scale-up factor obtains total rain stream distribution matrix, solved by minimum value and make total rain stream distribution matrix and the equivalence of target load rain stream distribution matrix, obtain the scale-up factor in each strengthening damage section;
Described each strengthening damage section scale-up factor specifically the mode of trying to achieve be,
First, target load rain stream distribution matrix is designated as
The strengthening load rain stream distribution matrix in each strengthening damage section is designated as X
i, i=1,2,3 ... n,
The scale-up factor of mixing is designated as A
i, i=1,2,3 ... n, obtains
In formula, X
iit is the strengthening load rain stream distribution matrix in i-th kind of strengthening damage section;
A
ibe the scale-up factor in i-th kind of strengthening damage section, i.e. hybrid weight coefficient;
Then, the minimum value of Y is asked by constraint condition 1,2, namely
Condition 1: scale-up factor A
ifor integer, i=1,2,3 ... n;
Condition 2: after mixing, section total length is the shortest, i.e. requirement
value minimum, in formula, S
ibe the length in i-th kind of strengthening damage section, i=1,2,3 ... n.
Therefore, this belongs to constrained optimization problem.Solve constrained optimization problem to have and comprise Approximate programming method, cutting-plane method, Lagrange method, Lemke algorithm etc.Linear approximation method is by nonlinear programming linearization, asks the approximate solution of original problem by separating linear programming.Solve by approximating programming method.Objective function is
constraint function A
ifor integer, and requirement
value minimum.First, by objective function and constraint function linearization, the span of variable is limited, thus obtained linear-apporximation planning, then with this linear programming of simplex method solution, using its optimum solution being similar to as solution.After often obtaining an approximate solution, more from this starting point, repeat above-mentioned steps.Like this, by a series of linear programming, produce a sequence be made up of Optimal Solution of Linear Programming.Experience shows, such sequence often converges on the solution of nonlinear programming problem.
S7: the scale-up factor in each strengthening damage section and final drive singal are combined, be compiled into a complete drive singal, road analogy stand carries out fatigue endurance test with complete drive singal to motorcycle, obtains the fatigue endurance test result in motorcycle life cycle management.
For the domestic two-wheeled riding-type motorcycle of certain money, sketch this working of an invention mode:
1) this vehicle main towards southern suburb, rural market user.Condition of road surface comprises level road, urban district road, hill path, bad road.Different kinds of roads allocation proportion is: level road and suburb road 600km, hill path 300km, bad road 100km, adds up to 1000km.Select to compose on collection road, Qionghai surrounding area, Hainan Province.Average speed of operation: level road and suburb road 60km/h, hill path 50km/h, bad road 40km/h.Loads typical is: carry 1 people, loading 20kg.
2), after selected sample car, at the axle spindle nose of motorcycle, three-way vibration acceleration transducer is installed respectively, measures the vibration signal of forward and backward spindle nose in driving process.Range is set as 50g, and sample frequency is 1024Hz.Select vertical and longitudinal acceleration signal as road spectrum signal.
3) acquisition of pseudo-damage; After completing the road spectrum collection of 1000km, based on acceleration signal, calculate the target load distribution matrix of targeted customer's road spectrum.First certain editing and processing is carried out to the user's road spectrum gathered, to different road surface, carry out average value processing, select 5 times of variance yields to remove anomaly peak, carry out low-pass filtering with 100Hz; Then, adopt rain flow method statistics load cycle number, draw the rain stream distribution matrix of different kinds of roads, this matrix has reacted average and cyclic loading size; Finally, 1000km road spectrum is carried out superposing obtain a total rain stream distribution matrix, i.e. target load distribution matrix.
4) gather the road spectrum in the strengthening damage section at certain testing field, comprise 11 kinds, washboard road, Block Road, pebble path, sandy beach road, fish-scale pit road, rectangular slab of stone road, bituminous road, muddy and ruthed lane, cement road, waveform road, abrupt slope road etc.Driver drives according to the requirement in various strengthening damage section.Consider the difference between different driver and average needs, generally at least measure 9 groups of data, then sort according to injury vector, get the road spectrum of median.Signal with reference to transition section carries out segmentation to the road spectrum signal recorded, and carries out in conjunction with GPS positioning signal and map.Then, the spectrum signal that satisfies the need carries out necessary editing and processing, comprises average, removes burr (anomaly peak point), filtering etc.Anomaly peak point is not the collection signal of actual needs, mainly owing to measuring, record, interference in transfer process or transient error cause, a handstone on such as road surface just may bring interference, anomaly peak point is often much bigger than normal signal, comparatively big error can be brought to result, must be rejected.Adopt the method arranging amplitude thresholding to remove, thresholding is set to 5 times of variance yields.Adopt low-pass filter to carry out filtering, according to signal analysis, the signal higher than 80Hz belongs to the vibration signal of engine, very little to fatigue damage contribution, gives filtering.In order to realize accelerated test, removing undamaged a small amount of, with reference to the signal in transition section, is 8% of signal maximum by threshold sets.
5) in four-way motorcycle road simulator stand, respectively iterative is carried out to strengthening road spectrum.Acceleration signal road collected on motorcycle spindle nose is the response signal of motorcycle to ground, i.e. road spectrum.In order to fatigue endurance test will be carried out in testing laboratory, just need the drive singal of trying to achieve road simulator stand.The step of solution procedure is: a) load road spectrum signal, namely tests required Expected Response signal R; B) motorcycle is arranged in road simulator stand, with white noise signal by electrohydraulic servo-controlling system driving device hydraulic mechanism, motorcycle is loaded, gather the response signal of spindle nose position before and after motorcycle, the transfer function H of computing system; C) according to transfer function H and Expected Response signal R, the method for matrix inversion is utilized to try to achieve initial driving signal D
0, D
0=H
-1r; D) simulative iteration, because whole pilot system is nonlinear, and the mensuration of above-mentioned transfer function matrix is linear prerequisite based on system, therefore needs to revise initial driving signal gradually by iterating, reduce iteration error, thus obtain the final drive singal of certain simulation precision.
6) on stand, motorcycle is tested with final drive singal, obtain the simulation road spectrum in each strengthening damage section; Rain flow method statistics load cycle number is adopted to the simulation road spectrum in each strengthening damage section, obtains the strengthening load rain stream distribution matrix in 11 kinds of strengthening damage sections;
7) optimization of hybrid weight coefficient calculates.In order to simulate the excitation of real road to motorcycle in road simulator stand, making the pseudo-equivalent damage of the two, different strengthening roads can be mixed according to certain scale-up factor and realize.This scale-up factor can be tried to achieve by mathematical method.Target load matrix is designated as Y, comprise four passages and front axle is vertical, front axle longitudinally, rear axle is vertical, rear axle is longitudinal, and the load diatibution matrix on 11 kinds of road surfaces is designated as X, also comprise this 4 passages, hybrid weight coefficient be designated as A, obtain equation
in fact, because mixing coefficient matrix A is integer, cannot try to achieve global solution, this equation is converted to the problem of minimizing, namely
final to hybrid weight coefficient solving result in table 2.As can be seen from Table 2, the hybrid weight coefficient solved is all integer, also has the mixing constant on partial reinforment road to be zero.Equivalence result of calculation between objective matrix and enhanced road surface is in table 3.Therefrom can find out, the two maintains good equivalence generally, and equivalent coefficient is 1.005, namely equivalence can replace mass society road with strengthening road.
The hybrid weight coefficient in table 211 kind of strengthening damage section
Table 3 equivalence result of calculation is analyzed
8) utilize four-way motorcycle road simulator stand, carry out fatigue endurance test.Optimize result of calculation according to equivalent lifetime, according to the hybrid weight coefficient in difference strengthening damage section, the final drive singal in difference strengthening damage section is combined, is compiled into a complete drive singal.Calculate according to upper table, the length of drive singal is 56.9km, and equivalence replaces target road 1000km, and therefore, coefficient of intensification is 1000/56.9=17.6 times.In four-way motorcycle road simulator stand, the drive singal utilized, encourages motorcycle to complete fatigue endurance test repeatedly.Fatigue endurance test contains life cycle management (as 100,000 kilometers).
Claims (9)
1. the motorcycle based on road analogy stand accelerates fatigue endurance test method, it is characterized in that: the road spectrum being obtained targeted customer's actual travel road of motorcycle by actual test-drive, rain flow method statistics load cycle number is adopted to the road spectrum of actual travel road, obtain the target load rain stream distribution matrix of targeted customer's actual travel road, carry out simulation test according to following steps;
S1: the strengthening damage section that several type is set;
S2: the road spectrum being obtained each strengthening damage section by actual test-drive;
S3: be placed to by motorcycle on road analogy stand and test, carries out iterative respectively to the road spectrum in each strengthening damage section and obtains final drive singal;
The detailed process of described iterative is first test motorcycle with white noise signal, obtains the transport function of road analogy platform system; Then load road spectrum as the Expected Response signal needed for test, according to transport function and Expected Response signal, utilize the method for matrix inversion to try to achieve initial driving signal; Iterate finally by test and revise initial driving signal gradually, thus obtain the final drive singal in each strengthening damage section;
S4: motorcycle is placed on road analogy stand and utilizes final drive singal to carry out testing the simulation road spectrum obtaining each strengthening damage section;
S5: rain flow method statistics load cycle number is adopted to the simulation road spectrum in each strengthening damage section, obtains the strengthening load rain stream distribution matrix in each strengthening damage section;
S6: the strengthening load rain stream distribution matrix mixing each strengthening damage section according to certain scale-up factor obtains total rain stream distribution matrix, solved by minimum value and make total rain stream distribution matrix and the equivalence of target load rain stream distribution matrix, obtain the scale-up factor in each strengthening damage section;
S7: the scale-up factor in each strengthening damage section and final drive singal are combined, be compiled into a complete drive singal, road analogy stand carries out fatigue endurance test with complete drive singal to motorcycle, obtains the fatigue endurance test result in motorcycle life cycle management.
2. to accelerate fatigue endurance test method based on the motorcycle of road analogy stand as claimed in claim 1, it is characterized in that: the concrete acquisition pattern of described road spectrum is, first respectively vibration transducer is installed at the axle spindle nose of motorcycle, when motorcycle driving, the signal that vibration transducer gathers and road spectrum.
3. to accelerate fatigue endurance test method based on the motorcycle of road analogy stand as claimed in claim 2, it is characterized in that: the signal of described vibration transducer collection gets vertical and longitudinal signal configuration acceleration four-matrix as road spectrum signal.
4. to accelerate fatigue endurance test method based on the motorcycle of road analogy stand as claimed in claim 1, it is characterized in that: described strengthening damage section includes, but are not limited to following 11 kinds, is respectively washboard road, Block Road, pebble path, sandy beach road, fish-scale pit road, rectangular slab of stone road, bituminous road, muddy and ruthed lane, cement road, waveform road, abrupt slope road.
5. the motorcycle based on road analogy stand as described in a claim any in Claims 1 to 4 accelerates fatigue endurance test method, it is characterized in that: also comprise in described step S2 and compose to the road in each strengthening damage section the step processed, the process of spectrum of satisfying the need comprises average, removes anomaly peak point, filtering, the little value of removal.
6. to accelerate fatigue endurance test method based on the motorcycle of road analogy stand as claimed in claim 5, it is characterized in that: the mode of described removal anomaly peak point is adopt the method arranging amplitude thresholding to remove anomaly peak point, to obtain real road spectrum, amplitude thresholding is set to 3 ~ 6 times of mean square deviations.
7. to accelerate fatigue endurance test method based on the motorcycle of road analogy stand as claimed in claim 5, it is characterized in that: described in be filtered into and adopt low-pass filter to carry out filtering.
8. to accelerate fatigue endurance test method based on the motorcycle of road analogy stand as claimed in claim 5, it is characterized in that: the little value of described removal is for arranging removal amplitude, signal value is less than the signal removing amplitude to remove, removes amplitude and be set as 5% ~ 10% of signal maximum.
9. the motorcycle based on road analogy stand as described in a claim any in Claims 1 to 4 accelerates fatigue endurance test method, it is characterized in that: in described step S6 the scale-up factor in each strengthening damage section specifically the mode of trying to achieve be,
First, target load rain stream distribution matrix is designated as
The strengthening load rain stream distribution matrix in each strengthening damage section is designated as X
i, i=1,2,3 ... n,
The scale-up factor of mixing is designated as A
i, i=1,2,3 ... n, obtains
In formula, X
iit is the strengthening load rain stream distribution matrix in i-th kind of strengthening damage section;
A
ibe the scale-up factor in i-th kind of strengthening damage section, i.e. hybrid weight coefficient;
Then, the minimum value of Y is asked by constraint condition 1,2, namely
Condition 1: scale-up factor A
ifor integer, i=1,2,3 ... n;
Condition 2: after mixing, section total length is the shortest, i.e. requirement
value minimum, in formula, S
ibe the length in i-th kind of strengthening damage section, i=1,2,3 ... n.
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