A method for obtaining design parameters and installation parameters of a gas cylinder support fastening device

Abstract

The invention provides a method for acquiring a design parameter and an installation parameter of a gas cylinder supporting and fastening device. The method comprises the steps that under the condition of meeting safety criterions, torque of wrapping tapes and contact area of the wrapping tapes are regulated with a certain initial state serving as a starting point to enable mechanical properties of a combined body formed by a gas cylinder and the gas cylinder supporting and fastening device to meet a design requirement, and the design key parameter (namely, contact area of the buffering pad) and the installation parameter (namely, final pretightening torque of the wrapping tapes) in the gas cylinder supporting and fastening device are acquired finally, wherein the initial state is that 0.5-Nm initial torque is applied to the position between the two wrapping tapes, a buffering pad contacts with the gas cylinder completely, and 35-MPa pressure is filled into the gas cylinder; the safety criterions include that the stress of the wrapping tapes is 60 percent smaller than yield stress of wrapping tape materials, and the difference between the gas cylinder elongation before the wrapping tapes are pretightened and the gas cylinder elongation after the wrapping tapes are pretightened is smaller than five percent; the design requirement includes that first-order frequency of the combined body formed by the gas cylinder and the gas cylinder supporting and fastening device is greater than 90Hz;. The method can solve the problem that the design parameter and the installation parameter are hard to determine due to inaccurate analysis caused by nonlinearity of the mechanical properties of materials in the prior art. By means of the two-dimensional loop iteration test, the design parameter and the installation parameter are determined finally, and final using effect is confirmed.

Description

technical field [0001] The invention belongs to the field of design verification, and in particular relates to a method for obtaining design parameters and installation parameters of a gas cylinder support and fastening device. Background technique [0002] The general method of design verification is usually to first determine the design parameters, verify that the requirements are basically met through analysis, and then further verify or confirm through experiments. However, the current design and analysis methods cannot solve the particularity of the design of the support and fastening device for this type of gas cylinder. Due to the introduction of nonlinear materials such as rubber into the support and fastening device of the gas cylinder, and some design parameters of the material are related to the pre-tightening torque during installation (coupling), the current mechanical analysis tools cannot analyze the mechanical properties of the device. With accurate analysis...

AI Technical Summary

Problems solved by technology

However, the current design and analysis methods cannot solve the particularity of the design of the support and fastening device for this type of gas cylinder.

Due to the introduction of nonlinear materials such as rubber into the support and fastening device of the gas cylinder, and some design parameters of the material are related (coupling) to the pre-tightening torque during installation, the current mechanical analysis tools cannot analyze the mechanical properties of the device. Accurate analysis, some key design parameters (such as thickness, contact area) and mounting moment cannot be determined and verified

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