A calculation method for satellite storage tank critical detonation under the action of high-speed impact of fragments
A technology for storage tanks and debris, applied in the field of critical detonation of satellite storage tanks, can solve the problems of different physical and chemical properties, difficult to accurately describe the problem of liquid propellant impact detonation, etc., and achieve accurate and effective calculation results, good consistency and low cost. Effect
Pending Publication Date: 2019-06-18
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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[0008] In fact, compared with heterogeneous explosives, liquid propellants have very different physical and chemical properties, and there are also differences in the propagation process and mechanism of shock waves after fragment impact. Therefore, it is difficult to accurately describe the liquid The Problem of Shock Initiation of Propellants
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[0022] specific implementation plan
[0023] The calculation method for the critical detonation of the satellite tank under the high-speed impact of the fragments of the present invention will be further described in detail in conjunction with the accompanying drawings.
[0024] figure 1 Main steps for the derivation and verification of the present invention.
[0025] Step 1: Construct calculation formulas for the shock wave pressure and pressure duration in the tank.
[0026] Walker and Wasley proposed the famous Walker-Wasley criterion for the shock initiation of heterogeneous explosives:
[0027] P 2 τ=C (1)
[0028] Among them, P refers to the shock wave pressure; τ refers to the pressure pulse duration; C is a constant determined by experience.
[0029] For liquid hydrazine, the most widely used propellant in satellite propulsion systems, Garcia et al. used the Walker-Wasley criterion to study its explosive characteristics in the report "Detonability Study of Liquid ...
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The invention belongs to the field of explosion and impact dynamics, relates to a calculation method for satellite storage tank critical detonation under the action of high-speed impact of fragments,and aims to judge whether the satellite storage tank explosion can be caused by the high-speed impact of the fragments or not. The calculation method for the critical detonation of the satellite storage tank under the action of the high-speed impact of the fragments comprises the following steps: firstly, constructing a calculation formula of shock wave pressure and pressure duration in the storage tank; Secondly, determining a power density threshold value of propellant liquid hydrazine, and establishing a critical initiation model suitable for a satellite storage tank; And finally, verifyingthe effectiveness of the satellite storage tank critical detonation model. The method has the advantages that whether fragment impact causes explosion of the satellite storage tank or not can be quantitatively judged without developing a fragment high-speed impact test, the cost is low, and implementation is easy.
Description
technical field [0001] The invention belongs to the field of explosion and impact dynamics, and relates to a calculation method for the critical detonation of a satellite tank under the impact of fragments at high speed. Background technique [0002] With the rapid increase in the number of space debris, the probability of collisions between orbiting satellites and space debris is greatly increased. The satellite tank containing liquid hydrazine accounts for about half of the satellite's mass and is one of the most critical components threatened by debris. The high-speed impact of debris may cause the satellite storage tank to rupture and the propellant to leak; it may also cause the liquid hydrazine to decompose and release a large amount of heat, causing the storage tank to explode and cause the catastrophic disintegration of the satellite. [0003] The NASA standard disintegration model of the United States can describe the failure mode and degree of disintegration of sa...
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IPC IPC(8): G06F17/50
Inventor 赵继广赵蓓蕾崔村燕杜小平段永胜王岩辛腾达
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV