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Excitation rod and manufacturing method thereof, and high-temperature modal simulation test device and method

A technology for exciting rods and test pieces, which is applied in the field of high-temperature modal parameter measurement devices, can solve the problems of reduced strength of high-temperature-resistant nickel-based alloys, damage to the moving coil of the vibrator, and influence on high-temperature modal tests, so as to avoid damage Effect

Pending Publication Date: 2020-12-01
CASIC DEFENSE TECH RES & TEST CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing thermal modal test excitation rod cannot work for a long time at this high temperature. In the existing test method, the maximum temperature that the ordinary aluminum excitation rod can withstand is 300 ℃, and the high temperature resistant nickel-based alloy excitation rod It can work below 750°C. When it exceeds 750°C and reaches 1200°C, the strength of the high-temperature-resistant nickel-based alloy decreases and the plasticity increases, resulting in a large change in the mechanical properties of the excitation rod, which cannot accurately transmit the applied excitation signal. Quartz lamp The high temperature of tube radiation heating will also be transmitted to the exciter through the excitation rod, which will damage the moving coil of the exciter and affect the smooth progress of the high temperature modal test

Method used

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  • Excitation rod and manufacturing method thereof, and high-temperature modal simulation test device and method
  • Excitation rod and manufacturing method thereof, and high-temperature modal simulation test device and method
  • Excitation rod and manufacturing method thereof, and high-temperature modal simulation test device and method

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Embodiment 1

[0031] This embodiment provides an exciting rod 10, such as Figure 1-6 As shown, it includes a connecting piece 1, a cooling piece 2 and a supporting piece 3 which are fixedly connected in sequence. The end of the connecting piece 1 away from the cooling piece 2 is used for fixed connection with the test piece 30, and the end of the supporting piece 3 away from the cooling piece 2 is used for connecting with the test piece 30. The exciter 20 is fixedly connected, and the inside of the cooling part 2 forms a cooling cavity 21. The cooling part 2 is provided with a liquid inlet and a liquid outlet communicating with the cooling cavity 21. The liquid cooling medium passes through a liquid inlet pipe 22 from the liquid inlet. into the cooling chamber 21 , and flow out from the liquid outlet through the liquid outlet pipe 23 , so as to continuously feed the flowing liquid cooling medium into the cooling chamber 21 .

[0032] The exciting rod 10 provided in this embodiment is in a ...

Embodiment 2

[0046] This embodiment provides a high temperature modal simulation test device, such as Image 6 As shown, the vibration rod 10 in the first embodiment is included, and the lower end of the vibration rod 10 is fixedly connected with the vibration exciter 20. Preferably, the support cylinder 31, the bottom plate 32, and the rib 33 are welded together and connected to the vibration exciter. 20 flanges are fixedly connected by screws, the upper end of the excitation rod 10 is fixedly connected to the test piece 30, and the test piece is fixedly connected to the fixed column 90; according to requirements, the high temperature modal simulation test device can also include but not limited to quartz lamps Tube 40, heat insulating asbestos felt 50, ceramic rod 60, metal rod 70 and acceleration sensor 80. During the high-temperature modal test, the controller sends an electrical signal to drive the vibrator 20 to perform mechanical vibration, and the vibrating rod 10 moves together wi...

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Abstract

The invention discloses an excitation rod and a manufacturing method thereof, and relates to the technical field of high-temperature modal parameter measuring devices. The excitation rod comprises a connecting piece, a cooling piece and a supporting piece which are fixedly connected in sequence. The end, away from the cooling piece, of the connecting piece is used for being fixedly connected witha test piece, the end, away from the cooling piece, of the supporting piece is used for being fixedly connected with a vibration exciter, a cooling cavity is formed in the cooling piece, a liquid inlet and a liquid outlet which communicate with the cooling cavity are formed in the cooling piece, and flowing liquid cooling media are introduced into the cooling cavity. The invention further discloses a high-temperature modal simulation test device comprising the excitation rod and a high-temperature modal simulation test method. According to the excitation rod and the manufacturing method thereof, and the high-temperature modal simulation test device and method, normal application of excitation signals of the excitation rod at the temperature of 750-1200 DEG C in a high-temperature environment can be realized.

Description

technical field [0001] The invention relates to the technical field of high-temperature modal parameter measurement devices, in particular to an exciting rod and a manufacturing method thereof, and a high-temperature modal simulation test device and method. Background technique [0002] The vibration exciter is a common equipment used to excite the test object to generate forced vibration in the modal test. The vibration exciter converts the amplified electrical signal into mechanical energy, and acts on the test piece through the excitation rod and force sensor. The vibrator, the vibrating rod and the axis of the force sensor must be on the same straight line. As the flight speed of hypersonic vehicles is getting higher and higher, higher temperature requirements are put forward for ground high-temperature modal simulation tests. The temperature will reach 1200°C; in the thermal modal test, the application of the excitation signal is mainly applied to the test piece throug...

Claims

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Application Information

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IPC IPC(8): G01M7/02
CPCG01M7/022
Inventor 王毅赵朋飞秦强王刚张生鹏
Owner CASIC DEFENSE TECH RES & TEST CENT