SU1242746A1 - Installation for studying stress and shifts of ground under vehicle supports - Google Patents

Abstract

BACKGROUND OF THE INVENTION The invention relates to devices for investigating the interaction of a three-vehicle vehicle with ground. The purpose of the invention is to improve the accuracy and the expansion of the measurement range. The rails 3 are fixed to the housing 1 in the yoke x 2. In the supporting planes 5 of the carriage 4, knives or rods 9 are mounted with pressure sensors 10, rheostatic sensors of vertical 11 and transverse 12 movements. The carriage moves, with the help of the spindle 15 from the electric motor 19. When moving the vehicle under its supports, the ground is deformed. The physical properties of the soil vary both in depth and in transverse and longitudinal planes. 6 Il. but

Description

The invention relates to vehicle testing, in particular to devices investigating the interaction of a vehicle with a ground.

The purpose of the invention is to increase the accuracy and expansion of the measurement range.

Fig, 1 shows the installation with. the knives installed in the carriage; in fig. 2 - the same, with the rods with sensors installed in the carriage, FIG. 3 - the same, with a horizontal housing; in fig. 4 - rod with sensors, cut; in fig. 5 - size soil pressure sensors before the experiment; on € .. ig. 6 - the same when hitting a vehicle.

The installation for studying stresses and soil movements under vehicle supports includes a housing i on which guides 3 are fastened to the busbars 2, designed to install and provide for the movement of the carriage 4, in which reference planes 5 are mounted

assistance of nuts 6 and washers 7 knives 8 or rods U with strain gauge pressure sensors 10, vertical rheostat sensors 11 and 12 transverse displacements attached to them with the help of hinge assemblies 13, and longitudinal rheostat sensors 14; displacements. The carriage is moved along the guides by means of a lead screw 15, which is mounted in the yoke 16, the holder 17 with an internal thread rigidly connected to the carriage and the sleeve 18.

The torque on the spindle screw is transmitted from the reversing motor 19 through the coupling 20, a worm gear 21 and through the coupling 22 mounted on the frame 23 attached to the installation housing with screws 24. The installation housing can rotate relative to the frame. The contacts of strain gauge pressure sensors and rheostatic transducer displacements in transverse and vertical planes are connected to an amplifier (not shown), the output of which is in electrical communication with a loop oscilloscope (not shown), where the measurement results are recorded on an oscillographic screen.

lentoo

Rheostats 25 longitudinal sensors

displacements are connected to loops

oscilloscope through variable capacitances. To eliminate distortion of the measurement results due to the disruption of the soil structure, the pressure sensors are attached to the rods by means of hinges 26.

The installation works as follows.

At a short distance from the assumed gauge, the vehicle's two-rolls dig a hole in the soil, the dimensions of which correspond to the dimensions of the installation. In the supporting planes 5 of the carriage 4, 5 knives 8 are mounted and the installation in this form is placed in the hole.

Further, after switching on the reversing electric motor 19, through the coupling 23, the worm gearbox 21 and the coupling 0 22, the lead screw 15 is rotated, which rotates in the yoke 16, the hub 18 and in the yoke 17 with an internal thread rigidly connected with the carriage, moves it along the guides of the 3. Knives 8, embedded in the ground, cut through the channels under the assumed track of the vehicle (the structure of the ground under the track is practically not disturbed). 0 days of knives 8 out of the channels, it is enough to turn on the reversing motor for operation in the opposite direction. After this, it is necessary to prepare the installation directly for the measurement. In place of the knives 8, weights-9 with pressure sensors 10 and displacement sensors 11,12,14 are installed in the carriage 4.

The distance between the sensors 10 and the pressure must correspond to the distance between the knives 8 and is chosen from the experimental conditions. This adjustment is carried out with the help of nuts 6 and washers 7. Pressure sensors 10 are inserted into the barrel; with bars 9, into channels

similarly knives1M 8.-

When the vehicle moves under its supports, the ground is deformed, in addition, the physical properties of the ground change as

50 in depth, and in the transverse and longitudinal: Pressure sensors located at different depths provide a distribution of stresses depending on the depth.

55 Under the action of the load, the layers of soil, together with the pressure sensor, change their position, which is fixed

five

40

45

sensors 11, 12,14.

Claims (1)

The obtained data on F1–1 ziko-mechanical properties of the soil make it possible to measure the permeability of vehicles on soils with different bearing capacities. Invention Formula An installation for studying stresses and soil movements under vehicle supports, comprising a housing with guides, a carriage moving along the guides with horizontally mounted vertically movable rods with strain gauges pressure sensors at the outer ends and rheostat sensors of the longitudinal movement at the base, knives to form channels in the ground; a motion actuator ka2427464 racks and measuring and recording equipment, characterized in that, in order to improve the accuracy and expand the measurement range, 5 rods are installed in the carriage, at least B two rows and points: 1 tens of different lengths, outer ends and bases of rods svshsh with the middle parts with the help of hinge nodes, moreover, than in the hinge knots from the side The bases are fixed rheostatic sensors of worsted and transverse displacements, the rods are mounted into the carriage with their bases with the possibility of axial movement to ensure the operation of the rheostatic sensors of longitudinal movement and with the possibility of replacement with knives to form channels in the ground. four figure 1 ten .    th . / Y / V // 7 // /// /// /// 7 // /// / 7 / FIG. five / 7 / / 7 / / 7 / / 7/77 / (rig.V Editor P.Kossey Compiled by A.Gul ev Techred O.Gortvay Order 3691/38 Circulation 778 Subscription BNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d.A / 5 Production and printing company, Uzhgorod, Projecto st., A Proofreader M.Maksimiyiets