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Defence & Aerospace

China reduces noise levels of nuclear submarines


Chinese Submarines

Chinese Submarines

The following is based on a translation of a report on a Chinese news site:

A report on Chinese news site 163.com says that China has mastered the technology of soft Coupling and other vibration reduction technology (raft anti-vibration technology) for its nuclear submarines.

This involves the use of sound-proofing foam material and anechoic tiles to reduce the noise level of the 09-IIIB to 120-130 decibels.

The use of 7-blade propellers in most Chinese submarines has further reduced the noise level.

China is developing pump-jet propulsion technology and will use it in its new Type 09-V nuclear submarines to make its noise as low as the US Virginia-class submarines.

This will overcome the problem where Chinese submarines were easily detected by Japanese self-defence forces, so that China cannot be so easily detected.

Translation of the terms in the chart:

第一代 first generation
第二代 second generation
第三代 third generation
第四代 fourth generation
攻击型核潜艇 attack nuclear submarine
战略核潜艇 strategic nuclear submarine

米 meter
分贝 decibel

According to the chart:

China’s 1st generation nuke sub sinks 300 meters deep with 160 decibels of noise
China’s 2nd generation nuke sub sinks 350 meters deep with 140 decibels of noise
China’s 3rd generation nuke sub sinks 400 meters deep with 120-130 decibels of noise
China’s 4th generation nuke sub sinks 400 meters deep with 110 decibels of noise

Contributed by “Tiananmen’s Tremendous Achievements” – Author of “Tiananmen’s Tremendous Achievements” and “Space Era Strategy” – Also English/Chinese translation service

Source: war.163.com “PLA submarine was closely chased by Japan due to too high noise level” (summary by Chan Kai Yee based on the report in Chinese)

 

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About chankaiyee2

Author of the book "Tiananmen's Tremendous Achievements" about how with the help of Tiananmen Protests, talented scholars with moral integrity seized power in the Party and state and brought prosperity to China. The second edition of the book will be published within a few days to mark the 25th anniversary of Tiananmen Protests All the parts in the first edition remain in the second edition with a few changes due to information available later and better understanding. There are also some changes for improvements of style. The new parts are Chapters 12-19 on events in China after the first edition was published: The fierce power struggle for succession between reformists and conservatives; Xi Jinping winning all elders’ support during his mysterious disappearance for 2 weeks in early September, 2012; and Xi Jinping Cyclone. Chan Kai Yee's new book: SPACE ERA STRATEGY: The Way China Beats The US An eye-opening book that tells the truth how the US is losing to China. The US is losing as it adopts the outdated strategy of Air-Sea Battle while China adopts the space era strategy to pursue integrated space and air capabilities: It is losing due to its diplomacy that has given rise to Russian-Chinese alliance. US outdated strategy has enabled China to catch up and surpass the US in key weapons: Hypersonic weapons (HGV) that Pentagon regards as the weapon that will dominate the world in the future. Aerospaceplane in China’s development of space-air bomber that can engage enemy anywhere in the world within an hour and destroy an entire aircraft carrier battle group within minutes. Anti-satellite (ASAT) weapons, anti-ASAT weapons, stealth aircrafts, drones, AEW&C, etc. The book gives detailed descriptions of China’s weapon development based on information mainly from Chinese sources that the author monitors closely. U.S. Must Not Be Beaten by China! China is not a democracy. Its political system cannot prevent the emergence of a despotic leader or stop such a leader when he begins to bring disasters to people. A few decades ago, Mao Zedong, the worst tyrant in world history did emerge and bring disasters to Chinese people. He wanted to fight a nuclear war to replace capitalism with communism but could not bring nuclear holocaust to world people as China was too weak and poor at that time. If a despot like Mao Zedong emerges when China has surpassed the US in military strength, world people will suffer the misery experienced by Chinese people in Mao era. China surpassing the US in GDP is not something to worry about as China has the heavy burden to satisfy its huge population, but China surpassing the US in military strength will be world people’s greatest concern if China remains an autocracy. US people are of much better quality than Chinese people. What they lack is a wise leader to adopt the correct strategy and diplomacy and the creative ways to use its resources in developing its military capabilities. I hope that with the emergence of a great leader, the US can put an end to its decline and remain number one in the world. China, US, space era strategy, air-sea battle, space-air bomber, arms race, weapon development, chan kai yee

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