CN205538510U - Can apply vertical cyclic loading device of frequency conversion of complicated load form - Google Patents

Abstract

The utility model relates to a can apply vertical cyclic loading device of frequency conversion of complicated load form. The utility model aims at providing a simple structure, the can apply vertical cyclic loading device of frequency conversion of complicated load form that the cost is lower, high pressure heater carries the number of times. The utility model provides a: the device has mold box and vertical and is fixed in the model pile in the mold box, and model pile upper end coupling torque load mechanism, moment load mechanism have the focus and change mechanism and balancing weight I, and the focus changes the mechanism and is fixed in ground through the steel bracket, and the focus changes rotatable the connecing on the steel bracket of pivot that mechanism's one end was arranged through the level, and the focus changes the mechanism and connects through wire rope I and adapter sleeve linkage model pile upper end, I string wire rope is on the focus changes the pulley I of mechanism top, and the focus changes the mechanism and still connects II strings balancing weight I, wire rope on the focus changes the pulley II of mechanism top through wire rope II, and pulley I, II is all installed on the steel bracket.

Description

The frequency conversion vertical CYCLIC LOADING device of Complicated Loads form can be applied

Technical field

This utility model relates to a kind of frequency conversion vertical CYCLIC LOADING device applying Complicated Loads form.It is suitable for Single pile model test in the vertical reciprocating CYCLIC LOADING of single-point.

Background technology

Pile foundation is one of range widest base structure form in land-based area civil engineering, and it is in ocean Engineering (such as ocean platform, oceanic winds electric field) also there are bigger utilization potentiality.With offshore wind-powered electricity generation it is Example, external widely used single pile type foundation.During fan operation, along with rotation and other seas of blade The overlaying influence of ocean environmental load, pile foundation can be acted on by vertical cyclic load.Consider the operation of 20 years Total life cycle, the vertical cyclic load magnitude that pile foundation is subject to is relatively big, has the vertical bearing capacity of base structure Very important impact.Additionally, due to vertically circulation load-bearing deformation, may be weak to the contact of stake soil and stake week The raw a certain degree of disturbance of local products, also has potential impact to the lateral bearing capacity of pile foundation.Existing research The problems referred to above are conducted a research work by the method generally using indoor scale (model) test.When carrying out model test, Generally use excitational equipment or the MTS hydraulic loading system of routine that somewhat expensive version is complicated, on There is main following defect in equipment of stating:

1. equipment making processing or lease expenses are costly, and need plant maintenance is spent more manpower Material resources；

2. it is difficult to the waveform requirements meeting indoor model test to loading amplitude.As homemade excitational equipment is difficult to protect That demonstrate,proves Loaded contact analysis stablizes loading that is controlled and that realize Complicated Loads form.Conventional MTS generally loads magnitude Relatively big, and indoor model test required load amplitude applied after similar reduction is less, thus use MTS It is difficult to meet the demand of test；

3. test is loaded number of times and has certain restriction, it is difficult to realize the cyclic loading test of relatively large level.From Excitational equipment processed is generally difficult to ensure to load stablizing of number of times relatively big rear load waveform, and conventional MTS is then difficult to Realize the CYCLIC LOADING of relatively large level；

The most existing loading equipemtn is generally directed to the horizontal cyclic of pile foundation and loads, it is difficult to be directly used in the vertical of pile foundation Cyclic loading test.

Summary of the invention

The technical problems to be solved in the utility model is: for the problem of above-mentioned existence, it is provided that a kind of structure letter Singly, the frequency conversion vertical CYCLIC LOADING device of the applied Complicated Loads form of cost loading number of times relatively low, high.

This utility model be the technical scheme is that a kind of frequency conversion applying Complicated Loads form vertically follows Ring charger, has model casing and the Model Pile being vertically fixed in model casing, it is characterised in that: described Model Pile upper end coupling torque load maintainer, described moment load maintainer has gravity center shift mechanism and balancing weight I, ground is fixed on through steel bracket in gravity center shift mechanism, and gravity center shift mechanism one end turns through horizontally disposed Axle is rotatably connected on steel bracket, and described gravity center shift mechanism is through steel wire rope I and connects the collar described mould of connection Type stake upper end, steel wire rope I is hung on the pulley I above gravity center shift mechanism, and gravity center shift mechanism is also through steel Cord II connects balancing weight I, and steel wire rope II is hung on the pulley II above gravity center shift mechanism, pulley I, II is mounted on steel bracket.

Described gravity center shift mechanism includes connecting platform, motor, rotating disk and balancing weight II, wherein connecting platform One end is rotatably connected on described steel bracket through described rotating shaft, and motor is fixed on connecting platform, this motor Fix rotating disk in rotating shaft, rotating disk deviates rotating shaft position balancing weight II is set.

The beneficial effects of the utility model are: 1, this utility model is based on principle of moment balance, utilize center of gravity to become The gravity center shift changing mechanism applies cyclic load to Model Pile, can adjust vertically following of output according to test demand Ring power.2, this utility model simple in construction, be easily maintained, there is preferable economy and reliability, output Load stability preferably and precision is higher.3, can be according to test demand (such as model casing size, Model Pile chi Very little etc.) parts are carried out Customization Module.

Accompanying drawing explanation

Fig. 1 is the structural representation of embodiment.

Fig. 2 is the schematic diagram of moment load maintainer in embodiment.

Fig. 3 is the structural representation connecting the collar in embodiment.

Detailed description of the invention

As it is shown in figure 1, the present embodiment is a kind of frequency conversion vertical CYCLIC LOADING dress applying Complicated Loads form Putting, have model casing 1 and the Model Pile 2 being vertically fixed in model casing, the upper end of Model Pile 2 connects it Apply the moment load maintainer of vertical load.

As in figure 2 it is shown, moment load maintainer has gravity center shift mechanism and balancing weight I 13, center of gravity in this example Changeable mechanism includes connecting platform 3, motor 4, rotating disk 5 and balancing weight II 6, and wherein connecting platform 3 is through steel Support 14 is fixed on ground, realizes turning through horizontally disposed rotating shaft 7 between connecting platform 3 and steel bracket 14 Dynamic connected, the other end of connecting platform 3 installs motor 4, the vertical connecting platform of rotating shaft 3 of this motor, motor It is fixed with rotating disk 5 in the rotating shaft of 4, balancing weight II 6 is set in the deviation machine shaft position of rotating disk 5.Connect The medium position of platform 3 is through steel wire rope I 8 and the upper end of the connection collar 12 (Fig. 3) link model stake 2, steel Cord I 8 is hung on pulley I 10 and pulley III 15 successively, and pulley I 10 is positioned at above connecting platform 3, sliding Taking turns III 15 and be positioned at above Model Pile 2, pulley I 10 and pulley III 15 are installed on steel bracket 14.Connect flat The medium position of platform 3 connects balancing weight I 13 through steel wire rope II 9, and steel wire rope II 9 is hung on above connecting platform 3 Pulley II 11, pulley II 11 is installed on steel bracket 14.

The operation principle of the present embodiment is as follows: the present embodiment charger mainly utilizes the equalising torque in mechanics Principle realizes the gravity of balancing weight II 6 and motor 4 is converted into vertical force, and concrete principle is as follows:

Along with motor 4 operates, the rotating disk 5 below drive rotates, the position between balancing weight II 6 and rotating shaft 7 Relation is continually changing, and causes the connecting platform 3 external force resultant moment at rotating shaft 7 to change, connecting platform 3 7 rotating around the shaft, realize Model Pile 2 under the cooperation of balancing weight I 13 and steel wire rope I, II is vertical Load.

As shown in Figure 2, it is assumed that when balancing weight II 6 is in L1 position, connecting platform 3 be in level its Equalising torque, now has:

∑M_O=0=F_m2×L1+F_rotor×L0-F_load×L3-F_m1×L4

When motor runs, and mass turns to, when O point L2 distance, now to be had:

∑M_O=F_m2×L2+F_rotor×L0-F_Load×L3-F_m1×L4

Then the load suffered by pile body is:

$F_{Load}=\frac{F_{m2}\×L2+F_{rotor}\×L0-F_{m1}\×L4}{L3}$

Wherein F_m2Gravity for balancing weight II 6；F_rotorGravity for motor 4；F_m1For balancing weight I 13 Gravity；F_LoadActive force for I 8 pairs of Model Pile 2 of steel wire rope.

Along with motor runs, rotatable platform produces and rotates, and balancing weight II 6 moves in L1 and L2 position Dynamic, it is 0 to F that pile body receives amplitude_LoadHorizontal force action.When the weight of regulation balancing weight I, II, When the rotation amplitude of guarantee connecting platform 3 is less, moment charger can export stable sinusoidal wave form lotus Carry；Further, by adjusting the weight of balancing weight I, II and hanging extra at loading on the connection collar 12 Mass, can realize Loaded contact analysis such as part eccentric, fully eccentric and full symmetric.

Claims (2)

1. can apply a frequency conversion vertical CYCLIC LOADING device for Complicated Loads form, there is model casing (1) The Model Pile (2) being vertically fixed in model casing, it is characterised in that: described Model Pile (2) upper end connects Moment load maintainer, described moment load maintainer has gravity center shift mechanism and balancing weight I (13), and center of gravity becomes Change mechanism and be fixed on ground through steel bracket (14), and gravity center shift mechanism one end is through horizontally disposed rotating shaft (7) Rotatably being connected on steel bracket (14), described gravity center shift mechanism is through steel wire rope I (8) and connects the collar (12) Connecting described Model Pile (2) upper end, steel wire rope I (8) is hung on the pulley I (10) above gravity center shift mechanism On, gravity center shift mechanism also connects balancing weight I (13) through steel wire rope II (9), and steel wire rope II (9) is hung on On pulley II (11) above gravity center shift mechanism, pulley I (10), II (11) is mounted on steel bracket (14) On.

The frequency conversion vertical CYCLIC LOADING device applying Complicated Loads form the most according to claim 1, It is characterized in that: described gravity center shift mechanism includes connecting platform (3), motor (4), rotating disk (5) and joins Pouring weight II (6), wherein connecting platform (3) one end is rotatably connected to described steel bracket through described rotating shaft (7) (14) on, motor (4) is fixed on connecting platform (3), and the rotating shaft of this motor is fixed rotating disk (5), In rotating disk (5) upper deviation machine shaft position, balancing weight II (6) is set.