SU531062A1 - Device for testing elements of seismic structures - Google Patents

Description

styling and expanding the functionality of the device for testing an ememe; keys of seismic resistant structures. The goal is achieved by introducing a program block, reference sensors and load cells into the device, while the pulse force actuator is made in the form of a supersonic nozzle passing into the drive cylinder, with side openings and equipped with gas filling valves, an internal pressure sensor, a pyro-cartridge head and a piston rod backstop, with the outputs of the program block connected to the gas filling valve, squibs, an internal pressure sensor, and force meters, ement is brought under the piston rod and is mounted on one of siloizmeritelej, reference elements that serves under the frame supports and mounted on the other siloizmeritelej x, solid rocket motors LAYOUT enes on the upper floors of the frame and provided with common fire bond. Fig, 1 shows a functional diagram of the proposed device; FIG. 2 is a section along the line A-A in FIG. 1. The device consists of a drive cylinder 1, which transforms into a supersonic nozzle 2, a piston 3 with a rod 4, seals 5 and a spring 6. The cylinder is mounted on a support frame 7, which has limiting guides 8 in place of the passage of the rod 4. the frame with the help of flanges 9, which are pressed to the frame by several reactive engines 1O, the engines 10 are interconnected by a common fire connection 11, which provides the same pressure on the flange from each engine due to simultaneous burning of towers 12. Pr aqueous cylinder 1 is provided with lateral apertures 13 (phi

employees to relieve pressure during downstroke of the piston. When selecting the impact force, the orifice is adjusted over the cross section using a ring 14 with a retainer in the form of a bolt. The supersonic nozzle 2 (Fig. 1) is equipped with a head 15 with several squibs 16 placed on it. Two nozzles 17, 18 are connected to the nozzle with gas filling valves 19, 20, which serve to introduce gas from cylinders 21, 22 supplied to the nozzle cavity gearboxes 23, 24. In addition, an internal pressure sensor 25 is mounted on the nozzle body.

The piston rod 4 is supported on the testing of an element 26, for example, a hydraulic buffer, a shock absorber, etc., mounted on a load cell 27, which in turn.

maximum load, and the oscilloscope 30 captures its value,

After the pressure is released, the load on the reference 32 and test / 1: 26 26 elements becomes the same due to the operation of the engines 10. At that, the readings of the 30, 34 and 35 must coincide,

if the test specimen meets the requirements of manufacture and is adjusted accordingly. When the oscilloscope 30 reads from the oscillographs 34, 35 and the need

calibrating element 26, its adjustment is made and all testing operations are repeated.

Thus, the proposed constructive implementation of the device allows

Claims (2)

Receive shock loads of instantaneous action are fixed at site 28. Valves, squibs, sensors and load cells are controlled by software block 29, and constant recording of load oscillations maintained by element 26 is carried out using, for example, an oscilloscope 30 connected to software block 29, The frame 7 has supports 31, which are mounted on the reference elements 32, which are placed, in turn, on force meters 33 that have individual recording blocks for changing load, for example, oscilloscopes 34, 35. On the rod 4 there is en backstop 36, the device operates as follows. The frame 7 is mounted on the reference elements 32 and load cells 33, then the test element 26 mounted on the load cell 27 is supplied under the rod 4, valves 19, 20, which conduct gas from cylinders 21, 22 and through pipelines 17, open at the command of the program block 29, 18 to the chamber of the nozzle 2; In this case, gas like acetylene oxygen, propane oxygen is supplied in a certain amount, and gas cutoff is performed when a certain pressure is reached in the chamber of the nozzle 2. On a special signal, engines 10 and oscillographs 30, 34, 35 are turned on. When recruiting engines 10, and this happens almost instantly, one of the squibs 16 is triggered and as a result the detonation of the explosive mixture occurs in the cavity of the nozzle 2. Shock wave falls on the piston 3, which through the rod 4 transmits an instantaneous sharp blow to the test element 26 "In this case, the piston 3 opens the holes 13, relieving the pressure in the chamber of the nozzle 2 and under the influence of the spring 6 returns to the neutral position. At this moment the sy gauge 27 at max. In accordance with the required program, it is also possible to perform a series of shock actions, i.e. It is possible to accurately simulate the law of increasing seismic effects caused, for example, by earthquakes. In addition, the device provides the necessary, in general, a number of cases, the calibration of the test items. Claim device for testing elements of seismic resistant structures, containing a pulsed exciter with a piston mounted on a support frame, the rod of which is oriented in the center of the test element, reactive solid propellant engines, characterized in that, in order to provide shock effects of increased sharpness and enhanced functionality, it has a program block, reference elements and force meters, and the pulse force 26, the pathogen is made in the form of a supersonic nozzle, the transition into the drive cylinder, with side openings and equipped with gas filling valves, an internal pressure sensor, a head with a pyro cartridge and a piston rod back stroke limiter, the outputs of the program block are connected to gas filling valves, a pyro cartridge, an internal pressure sensor and measuring instruments. it is brought under the piston rod and fixed on one of the measuring gauges, the reference elements are placed under the frame supports and mounted on the other measuring instruments; reactive solid fuel the engines are located on the upper platforms of the frame and are equipped with a common fire link. Sources of information taken into account in the examination of the invention: 1. Copyright certificate K9 246134, 1 pc. G01 N 3/32, 1967 2. Copyright certificate № 255615, class, G01 N 3/32, 1968 (prototype). FIG. one