CN104679952A - Simulation calculation method for checking seismic property of nuclear hoisting machinery - Google Patents

Abstract

A simulation calculation method for checking a seismic property of nuclear hoisting machinery belongs to the technical field of simulation analysis of the seismic property and is characterized by comprising the following calculation steps of calculating to determine response spectrum interpolations under different damping coefficients, which comprises the steps of selecting connecting positions as high response spectrum elevations, selecting damping coefficients and selecting interpolation methods; correcting spectrum values under different seismic conditions; setting material attributes; determining a load working condition combination under a most unfavorable load action; setting boundary conditions; analyzing model statics, which comprises the steps of connecting a steep rope and a trolley, restraining large vehicle wheels and simulating a hoisting weight; carrying out spectrum analysis on respective components one by one; responding to analysis and synthesis; analyzing a result. Due to the simulation calculation method provided according to the most unfavorable load action, the load combination working condition and response analysis synthesis method and the like are completed, and a simulation result is more reasonable; the setting of the boundary conditions and one-by-one analysis of respective components are more consistent with an actual seismic wave condition, and a comprehensive and objective evaluation on the seismic property of the hoisting machinery is conveniently made.

Description

Check the emulated computation method of nuclear power hoisting machinery shock-resistance features

Technical field

The invention belongs to shock-resistance features simulation analysis technical field, be specifically related to a kind of emulated computation method of checking nuclear power hoisting machinery shock-resistance features.

Background technology

Hoisting machinery a kind ofly relates to life security, dangerous larger mechanic-electrical special equipment, be widely used in the every field of the developments of the national economy such as harbour, mine, metallurgy, nuclear power and national life, with the work characteristics of its gap, repetition, realize weight space displacement by the lifting of crampon or suspender and migration.Along with the development of science and technology, more and more high to the requirement of the aspects such as hoisting machinery functional reliability, personal security, structural design, shock-resistance features, and its application in nuclear power facility requires harsher.Earthquake is the extremely strong spontaneous phenomenon of a kind of destructiveness, and according to incompletely statistics, on the earth, average every day, secondary earthquake about up to ten thousand occurred, and caused the earthquake of serious harm nearly about 15 times every year, nearly about 2 times of the earthquake of especially severe disaster to the mankind.Within 2011, Fukushima, Japan nuclear leakage event causes the serious concern of various countries to nuclear power facility shock-resistance features.Therefore, do not possess at ground experiment and to carry out and under the condition designed without concrete theoretical direction, propose a kind of emulated computation method that can be used for engineering test and appraisal for nuclear power hoisting machinery shock-resistance features and be necessary.

In recent years, the open source literature relating to the research of hoisting machinery aseismic analysis has: as Gao Suhe is entitled as " research of nuclear power station 70/5t crane aseismic analysis ", " fuel for nuclear power plant factory building whipline aseismic analysis ", adopt response spectrum method, intensity and toughness, up-throwing force etc. under the various working such as, OBE and SSE earthquake fully loaded to crane zero load, lift heavy position have carried out simulation analysis; Wang Weiqing etc. are entitled as " EPR reactor building ring-shaped crane seismic Calculation ", adopt time history analysis method to analyze crane seismic Calculation.But above-mentioned document weak point is: all do not analyze the operating mode that suspension hook is fully loaded with Upper-lower Limit, load working condition is considered, response analysis synthetic method need perfect etc., and this all can not provide comprehensive objective appraisal to the shock-resistance features of hoisting machinery.

Summary of the invention

The object of the invention is to provide a kind of emulated computation method of checking nuclear power hoisting machinery shock-resistance features, thus instructs the design of metal construction improve or take corresponding protection measure, to improve device security better.

The present invention is achieved in that to it is characterized in that comprising and calculates the response spectrum interpolation determined under different damping coefficient, spectrum correction, material properties setting, load working condition combination, boundary condition setting, analysis of spectrum, response analysis synthesis, the interpretation of result one by one of model statics Analysis, each component; Calculation procedure is as follows:

Response spectrum interpolation calculation step under A, different damping coefficient is:

A-1, determines response spectrum absolute altitude: according to the location arrangements of hoisting machinery in nuclear power factory building, think that the junction of equipment and factory building is shot point, produces the seismic response of crane thus when there is earthquake, therefore to choose junction height is response spectrum absolute altitude;

A-2, with reference to American National Standard ANSI/ASME NOG-1-2004 " nuclear power plant's bridge-type and trestle crane manufacturer's standard " or CNS GB50267-1997 " code for seismic design of unclear power plants ", during selected SL-1 and OBE seismic shock, ratio of damping is 0.04; During SL-2 and SSE seismic shock, ratio of damping is 0.07;

A-3, be the logarithmic function interpolation at the end with e for the spectrum interpolation employing between sustained height different frequency, the frequency between differing heights-spectrum interpolation adopts linear interpolation;

B, spectrum correction step are:

B-1, horizontal direction SL-2 earthquake maximum ground acceleration is 0.15g, SL-1 earthquake is 0.075g; Vertical direction SL-2 earthquake maximum ground acceleration is 0.1g, SL-1 earthquake is 0.05g; Wherein g=10m/s ²;

B-2, certain absolute altitude place frequency be f equipment seismic acceleration response M calculation expression be:

B-2-1, horizontal direction SL-1 earthquake: M=SL-1 spectrum × 0.75; SL-2 earthquake: M=SL-2 spectrum × 1.50;

B-2-2, vertical direction SL-1 earthquake: M=SL-1 spectrum × 0.50; SL-2 earthquake: M=SL-2 spectrum × 1.00;

C, material properties are set to:

Material properties parameters has: elastic modulus E, Poisson ratio μ, density p, yield strength σ _s, tensile strength sigma _b;

D, load working condition combination step are:

D-1, load combinations carries out reasonable combination by the worst operative condition of hoisting machinery structure.For dolly (or cucurbit) lift heavy at span centre, across end two positions, span centre is selected to be most danger position;

D-2, operating mode one: span centre is fully loaded with, and payload values is SR ₁;

D-3, operating mode two: span centre is unloaded, and payload values is SR ₂;

D-4, operating mode three: span centre horizontal cross, payload values is SR ₃;

D-5, operating mode four: longitudinally, payload values is SR to span centre level ₄;

D-6, operating mode five: span centre is vertically unloaded, payload values is SR ₅;

D-7, operating mode six: span centre is fully loaded (hooking up)-limes superiors vertically, and payload values is SR ₆;

D-8, operating mode seven: span centre is fully loaded (off the hook)-smallest limit vertically, and payload values is SR ₇;

E, boundary condition are set to:

Constraint condition: equipment and external connections are stiff end, thinks that under seismic condition, equipment in tolerance zone internal strain, therefore can be set to continuous beam or the free beam of multiple connection;

F, model statics Analysis step are as follows:

F-1, sets up beam element model, and wire rope is simulated according to beam element;

F-2, wire rope upper end and dolly (or cucurbit) coupling part are hinged;

F-3, cart wheel place adds constraint, and one end is for fixing solid, and the other end is with reference to solid, and does suitable translation setup of attribute;

F-4, adds lifting capacity load in wire rope lower end, and adds gravitation, in order to simulate crane weight;

F-5, grid division calculates;

G, each component one by one analysis of spectrum step are:

G-1, carries out analysis of spectrum calculating after model analysis;

G-2-1, adopt response spectrum method, the maximum reacting value of items gets square root sum square of each vibration shape maximum reacting value;

G-2-2, when the ratio of the less frequency of absolute value and one of them of the difference on the frequency of two vibration shapes is not more than 0.1, get the absolute value sum of two vibration shape maximal values and the maximum reacting value of other vibration shapes by square root sum square (SRSS) combine;

G-3, the direction selecting a certain component direction to arrange acceleration to excite, and set direction multiplication factor is 1;

G-4, input damping ratio be 0.04 SL-1 frequency-acceleration or damping ratio be 0.07 SL-2 frequency-acceleration, selected curve differential technique is logarithm, generates response spectra, carries out analysis of spectrum calculating after grid division;

G-5, other component direction calculates respectively by G-3, G-4 step;

H, response synthetic method are:

H-1, result of calculation is the superposition of analysis of spectrum and statics analysis results, and max architecture reaction is SR _max;

H-2-1， ${\mathrm{SR}}_{\max }^1={\mathrm{SR}}_1+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_6^2};$

H-2-2， ${\mathrm{SR}}_{\max }^2={\mathrm{SR}}_1+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_7^2};$

H-2-3， ${\mathrm{SR}}_{\max }^3={\mathrm{SR}}_1+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_5^2};$

Wherein: SR _maxget in maximal value, i=1 ~ 3;

I, interpretation of result step are:

I-1-1, shock-resistance features stress criterion: σ < σ _s(SL-2);

I-1-2, under Static behavior, Static stiffness f must meet s is girder span;

I-2, SL-2 earthquake: crane is upthrow not, drops in order to avoid derailing causes;

Advantage of the present invention and good effect are:

1. analyze according to least favorable load combinations the operating mode that suspension hook is fully loaded with Upper-lower Limit, perfect load combinations operating mode, response analysis synthetic method etc., make simulation result process more reasonable.

2. boundary condition setting and each component analyze seismic response comparatively coincidently seismic wave actual conditions one by one, are convenient to provide comprehensive objective appraisal to the shock-resistance features of hoisting machinery.

Therefore, the present invention is based on the nuclear power hoisting machinery shock-resistance features emulated computation method that Solidworks Simulation 2012 professional software proposes, the design of metal construction can be instructed to improve or take corresponding protection measure according to simulation result, improve device security.

Accompanying drawing explanation

Fig. 1 is the process flow diagram of shock-resistance features emulated computation method of the present invention;

Fig. 2 is continuous beam junction linked vector graph schematic diagram;

Fig. 3 is that model analysis quality participates in situation map;

Fig. 4 be SL-2 span centre fully loaded-smallest limit excites Z-direction axially and folding stress figure;

Fig. 5 be SL-2 span centre fully loaded-smallest limit excites Z-direction axial stress figure;

Fig. 6 be SL-2 span centre fully loaded-smallest limit excites Z-direction resultant displacement figure;

Fig. 7 be SL-2 span centre fully loaded-smallest limit excites Z-direction X to displacement diagram;

Fig. 8 be SL-2 span centre fully loaded-smallest limit excites Z-direction Y-direction displacement diagram;

Fig. 9 be SL-2 span centre fully loaded-smallest limit excites Z-direction Z-direction displacement diagram;

Figure 10 be SL-2 span centre fully loaded-smallest limit excites Z-direction Y retroaction to try hard to;

Number in the figure: 1-anchor plate, 2-welds, 3-channel-section steel, and 4-bolt connects, 5-joist steel.

Embodiment

Certain nuclear power plant's reactor building hoisting machinery hand-operated singletrack crane, correlation parameter is: lifting capacity Q=1000kg; Span S=3900mm, lifting altitude H=2m; Girder is joist steel, model 20a; Track model: joist steel, model 200mm × 100mm × 7mm, length 3900mm; Suspension hook upper extreme position is 441mm apart from girder distance from bottom, and cucurbit is conducted oneself with dignity about 220kg, and linked vector graph as shown in Figure 2.

Calculation procedure is as follows:

Response spectrum interpolation calculation step under A, different damping coefficient is:

A-1, according to the location arrangements of equipment in nuclear power factory building, choosing response spectrum absolute altitude is 3.35m;

A-2, with reference to American National Standard ANSI/ASME NOG-1-2004 " nuclear power plant's bridge-type and trestle crane manufacturer's standard " or CNS GB50267-1997 " code for seismic design of unclear power plants ", during selected SL-1 and OBE seismic shock, ratio of damping is 0.04; During SL-2 and SSE seismic shock, ratio of damping is 0.07;

A-3, be the logarithmic function interpolation at the end with e for the spectrum interpolation employing between sustained height different frequency, the frequency between differing heights-spectrum interpolation adopts linear interpolation; Calculate ratio of damping when being respectively 0.04 (SL-1), 0.07 (SL-2), the acceleration response spectrum in horizontal X direction, horizontal Y-direction and vertical Z direction, concrete data are in table 1; Ratio of damping listed by table 1 is 0.04 vertical Z directional acceleration response spectrum (SL-1), and other situation is slightly write, and in table, italic adds black data is logarithm interpolation.

Table 1

Sequence number	Frequency (Hz)	0m	4.65m	3.35m
					1	0.3	0.066	0.067	0.067
2	2.49	0.532	0.476	0.492
					3	5.9	0.532	0.476	0.492
4	7.03	0.532	0.568	0.558
					5	11.01	0.586	0.568	0.573
6	12.92	0.645	0.77	0.735
					7	17.78	0.645	0.77	0.735
8	20.54	0.313	0.314	0.314
					9	22.97	0.239	0.267	0.259
10	30.14	0.239	0.267	0.259
					11	34.81	0.163	0.174	0.171
12	100	0.163	0.174	0.171

B, spectrum correction step are:

B-1, horizontal direction SL-2 earthquake maximum ground acceleration is 0.15g, SL-1 earthquake is 0.075g; Vertical direction SL-2 earthquake maximum ground acceleration is 0.1g, SL-1 earthquake is 0.05g; Wherein g=10m/s ²;

B-2, to be the equipment seismic acceleration response M calculation expression of f be certain absolute altitude place frequency:

B-2-1, horizontal direction SL-1 earthquake: M=SL-1 spectrum × 0.75; SL-2 earthquake: M=SL-2 spectrum × 1.50;

B-2-2, vertical direction SL-1 earthquake: M=SL-1 spectrum × 0.50; SL-2 earthquake: M=SL-2 spectrum × 1.00;

Concrete data are shown in Table 2, and ratio of damping listed by table 2 is 0.04 vertical Z direction, i.e. vertical direction acceleration response spectrum (SL-1), and other situation is slightly write.

Table 2

Sequence number	Frequency (Hz)	3.35m	Spectrum correction
				1	0.3	0.067	0.0335
2	2.49	0.492	0.246
				3	5.9	0.492	0.246
4	7.03	0.558	0.279
				5	11.01	0.573	0.2865
6	12.92	0.735	0.3675
				7	17.78	0.735	0.3675
8	20.54	0.314	0.157
				9	22.97	0.259	0.1295
10	30.14	0.259	0.1295
				11	34.81	0.171	0.0855
12	100	0.171	0.0855

C, material properties are set to:

Material is Q235B, and material properties parameters has: elastic modulus E=206GPa, Poisson ratio μ=0.3, density p=7850kg/m ³, yield strength σ _s=235MPa, tensile strength sigma _b=370MPa;

D, load working condition combination step are:

D-1, load combinations carries out reasonable combination by the worst operative condition of hoisting machinery structure, and for dolly (or cucurbit) lift heavy at span centre, across end two positions, span centre is most danger position; Table 3 is load working condition combination.

Table 3

Operating mode	Load condition	Payload values
			1	Span centre is unloaded	SR 1
2	Span centre is fully loaded with	SR 2
			3	Span centre horizontal cross-X	SR 3
4	Span centre level is-Z longitudinally	SR 4
			5	The vertical zero load of span centre-Y	SR 5
6	Span centre is fully loaded (hooking up)-limes superiors vertically	SR 6
			7	Span centre is fully loaded (off the hook)-smallest limit vertically	SR 7

E, boundary condition are set to:

Application business finite element software Solidworks Simulation 2012 pairs of hoisting machineries carry out three-dimensional modeling, arrange continuous beam or free beam that model is multiple connection;

F, model statics Analysis step are:

F-1, sets up beam element model, and wire rope is simulated according to beam element;

F-2, wire rope upper end and cucurbit coupling part are hinged;

F-3, this example does not relate to cart walking mechanism, therefore does not arrange it;

F-4, adds lifting capacity load in wire rope lower end, and adds gravitation, in order to simulate crane weight;

F-5, grid division calculates;

G, each component one by one analysis of spectrum step are:

G-1, have frequency at the emulation initial stage by oneself to complete machine and assess to ensure that all directions collision participating masses all reaches about 95%, collision participating masses as shown in Figure 3, carries out analysis of spectrum calculating after model analysis;

G-2-1, adopt response spectrum method, the maximum reacting value of items gets square root sum square of each vibration shape maximum reacting value;

G-2-2, when the ratio of the less frequency of absolute value and one of them of the difference on the frequency of two vibration shapes is not more than 0.1, get the absolute value sum of two vibration shape maximal values and the maximum reacting value of other vibration shapes by square root sum square (SRSS) combine;

G-3, the direction selecting a certain component direction to arrange acceleration to excite, and set direction multiplication factor is 1;

G-4, input damping ratio be 0.04 SL-1 frequency-acceleration or damping ratio be 0.07 SL-2 frequency-acceleration, selected curve differential technique is logarithm, generates response spectra, carries out analysis of spectrum calculating after grid division;

G-5, other component direction calculates respectively by G-3, G-4 step;

Simulation result extracts, and SL-2 span centre is fully loaded-and smallest limit excites Z-direction result of calculation as shown in Fig. 4 ~ 10, and other operating mode is slightly write.Table 4 is crane load result of calculation under seismic (seismal effect.

Table 4

H, response synthetic method are:

H-1, result of calculation is the superposition of analysis of spectrum and statics analysis results, and max architecture reaction is SR _max;

H-2-1， ${\mathrm{SR}}_{\max }^1={\mathrm{SR}}_1+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_6^2};$

H-2-2， ${\mathrm{SR}}_{\max }^2={\mathrm{SR}}_1+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_7^2};$

H-2-3， ${\mathrm{SR}}_{\max }^3={\mathrm{SR}}_1+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_5^2};$

Wherein, SR _maxget in maximal value, i=1 ~ 3;

Table 5 is displacement structure and stress synthesis maximum value calculation (SL-2), and SL-1 situation is slightly write.

Table 5

Table 6 is displacement structure and stress maximal value under seismic (seismal effect.

Table 6

Sequence number	Explanation	SR max(SL-1)	SR max(SL-2)
				1	Axis and bending (MPa)	68.18181	71.59893
2	Axially (MPa)	14.46151	5.174887
				3	Resultant displacement (mm)	10.36747	10.752

4	X(mm)	0.08391	0.108201
				5	Y(mm)	2.059006	3.193032
6	Z(mm)	9.895535	10.37602

I, interpretation of result step are:

I-1-1, under seismic (seismal effect, the permissible stress of vibrative mechanism is: σ < σ _s=235MPa;

I-1-2, under the effect of Static Calculation load, Static stiffness allowable is:

I-2, SL-2 earthquake: crane is upthrow not, drops in order to avoid derailing causes;

According to table 6 data analysis, displacement structure and stress under seismic (seismal effect, SL-1 earthquake: stress maximal value 68.18181MPa, meets above formula, meets the requirements; SL-2 earthquake: stress maximal value 71.59893MPa, meets above formula, meets the requirements; Under basic load effect, displacement structure maximal value is 0.45mm (static load, span centre is fully loaded with), meets above formula, meets the requirements.

Associative list 4 data analysis, jacklift (or cucurbit) mechanism, SL-1 earthquake: displacement maximal value 10.36747mm, minimum wheel load 59077/4=14769.25N; SL-2 earthquake: displacement maximal value 10.752mm, minimum wheel load 59659/4=14914.75N; Please take necessary measure, as arranged anti-tilting apparatus and anchoring device etc., ensure under SL-1 and SL-2 geological process, hoisting device parts do not drop and missile do not occur.

Other, the ability of bearing transverse load due to joist steel is more weak, advises adopting at the solidified portion of device structure and factory building flexibly connecting, as adopted band elongated hole bolt-connected formula.

So far, the calculation and check that nuclear power hoisting machinery shock-resistance features emulated computation method for the present invention's proposition is used for this example terminates, it is comparatively objective that shock-resistance features is checked, and the evaluation index for simulation result shortcoming gives innovative approach, improves device security to a certain extent.

Supplementary notes;

Above content is only example of the present invention and describes; for those of ordinary skill in the art; according to thought of the present invention; all will change in specific embodiments and applications; this description should not be construed as limitation of the present invention; other occasion is directly applied to, all within protection scope of the present invention without improving.

Claims (1)

1. check an emulated computation method for nuclear power hoisting machinery shock-resistance features, it is characterized in that: comprise and calculate the response spectrum interpolation determined under different damping coefficient, spectrum correction, material properties setting, load working condition combination, boundary condition setting, analysis of spectrum, response analysis synthesis, the interpretation of result one by one of model statics Analysis, each component; Calculation procedure is as follows:

Response spectrum interpolation calculation step under A, described different damping coefficient is:

A-1, determines response spectrum absolute altitude: according to the location arrangements of hoisting machinery in nuclear power factory building, think that the junction of equipment and factory building is shot point, produces the seismic response of crane thus when there is earthquake, therefore to choose junction height is response spectrum absolute altitude;

A-2, with reference to American National Standard ANSI/ASME NOG-1-2004 " nuclear power plant's bridge-type and trestle crane manufacturer's standard " and CNS GB50267-1997 " code for seismic design of unclear power plants ", during selected SL-1 and OBE seismic shock, ratio of damping is 0.04; During SL-2 and SSE seismic shock, ratio of damping is 0.07;

A-3, be the logarithmic function interpolation at the end with e for the spectrum interpolation employing between sustained height different frequency, the frequency between differing heights-spectrum interpolation adopts linear interpolation;

B, spectrum correction step are:

B-1, horizontal direction SL-2 earthquake maximum ground acceleration is 0.15g, SL-1 earthquake is 0.075g; Vertical direction SL-2 earthquake maximum ground acceleration is 0.1g, SL-1 earthquake is 0.05g; Wherein g=10m/s ²;

B-2, certain absolute altitude place frequency be f equipment seismic acceleration response M calculation expression be:

B-2-1, horizontal direction SL-1 earthquake: M=SL-1 spectrum × 0.75; SL-2 earthquake: M=SL-2 spectrum × 1.50;

B-2-2, vertical direction SL-1 earthquake: M=SL-1 spectrum × 0.50; SL-2 earthquake: M=SL-2 spectrum × 1.00;

C, material properties are set to:

Material properties parameters has: elastic modulus E, Poisson ratio μ, density p, yield strength σ _s, tensile strength sigma _b;

D, load working condition combination step are:

D-1, load combinations carries out reasonable combination by the worst operative condition of hoisting machinery structure, for dolly (or cucurbit) lift heavy at span centre, across end two positions, selects span centre to be most danger position;

D-2, operating mode one: span centre is fully loaded with, and payload values is SR ₁;

D-3, operating mode two: span centre is unloaded, and payload values is SR ₂;

D-4, operating mode three: span centre horizontal cross, payload values is SR ₃;

D-5, operating mode four: longitudinally, payload values is SR to span centre level ₄;

D-6, operating mode five: span centre is vertically unloaded, payload values is SR ₅;

D-7, operating mode six: span centre is fully loaded (hooking up)-limes superiors vertically, and payload values is SR ₆;

D-8, operating mode seven: span centre is fully loaded (off the hook)-smallest limit vertically, and payload values is SR ₇;

E, boundary condition are set to:

Constraint condition: equipment and external connections are stiff end, thinks that under seismic condition, equipment in tolerance zone internal strain, therefore can be set to continuous beam or the free beam of multiple connection;

F, model statics Analysis step are:

F-1, sets up beam element model, and wire rope is simulated according to beam element;

F-2, wire rope upper end and dolly (or cucurbit) coupling part are hinged;

F-3, cart wheel place adds constraint, and one end is for fixing solid, and the other end is with reference to solid, and does suitable translation setup of attribute;

F-4, adds lifting capacity load in wire rope lower end, and adds gravitation, in order to simulate crane weight;

F-5, grid division calculates;

G, each component one by one analysis of spectrum step are:

G-1, carries out analysis of spectrum calculating after model analysis;

G-2-1, adopt response spectrum method, the maximum reacting value of items gets square root sum square of each vibration shape maximum reacting value;

G-2-2, when the ratio of the less frequency of absolute value and one of them of the difference on the frequency of two vibration shapes is not more than 0.1, get the absolute value sum of two vibration shape maximal values and the maximum reacting value of other vibration shapes by square root sum square (SRSS) combine;

G-3, the direction selecting a certain component direction to arrange acceleration to excite, and set direction multiplication factor is 1;

G-4, input damping ratio be 0.04 SL-1 frequency-acceleration or damping ratio be 0.07 SL-2 frequency-acceleration, selected curve differential technique is logarithm, generates response spectra, carries out analysis of spectrum calculating after grid division;

G-5, other component direction calculates respectively by G-3, G-4 step;

H, response synthetic method are:

H-1, result of calculation is the superposition of analysis of spectrum and statics analysis results, and max architecture reaction is SR _max;

$H-2-1,{\mathrm{SR}}_{\max }^1={\mathrm{SR}}_1+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_6^2};$

$H-2-2,{\mathrm{SR}}_{\max }^2={\mathrm{SR}}_1+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_7^2};$

$H-2-3,{\mathrm{SR}}_{\max }^3={\mathrm{SR}}_2+\sqrt{{\mathrm{SR}}_3^2+{\mathrm{SR}}_4^2+{\mathrm{SR}}_5^2};$

Wherein, SR _maxget in maximal value, i=1 ~ 3;

I, interpretation of result step are:

I-1-1, shock-resistance features stress criterion: σ < σ _s(SL-2);

I-1-2, under Static behavior, Static stiffness f must meet s is girder span;

I-2, SL-2 earthquake: crane is upthrow not, drops in order to avoid derailing causes.