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针对深海环境,压力表工作存在高背压的情况,研究波登管承受极大外压应力时的应变-压力特性,探究压力表能否有效工作。基于ANSYS建立波登管的非线性有限元模型。通过对高背压与无背压环境下工作的C型波登管有限元仿真分析,比较两种工况下的应力与应变分布,得出C型波登管在高背压环境下的应变-压力特性,并在深海模拟舱内进行试验验证。仿真结果表明:深海高背压环境会使波登管最大应变量缩小,最大误差为1.0%,在有效工作允许范围内;应力分布不变,最大应力减小。C型波登管压力表在高背压环境下工作示数减小,但压力表示数误差在工作允许范围内。在高背压条件下波登管不会失效,压力表可以有效工作。
In the deep sea environment, there is a situation of high back pressure in the work of the pressure gauges, and the strain-pressure characteristics of the Bourdon tube subjected to the great external compressive stresses are investigated to see if the pressure gauges can work effectively. Establishment of Bourdon Pipe Nonlinear Finite Element Model Based on ANSYS. Through the finite element analysis of C type Bourdon tube with high back pressure and no back pressure, the stress and strain distribution under two conditions are compared, and the strain of C type Bourdon tube under high back pressure is obtained - Pressure characteristics and experimental verification in a deep ocean simulation tank. The simulation results show that the maximum strain of Bourdon tube decreases with the high back pressure in deep ocean. The maximum error is 1.0%, which is within the allowable working range. The stress distribution keeps unchanged and the maximum stress decreases. C-type Bourdon tube pressure gauge in the work under high back pressure to reduce the number, but the pressure that the number of errors within the allowable range. The Bourdon tube will not fail under high backpressure conditions and gauges work effectively.